Low voltage switchgear Compact Merlin Gerin

Low voltage switchgear Compact Merlin Gerin Exploitation guide

d

pe

trip

t

se

re

O F OF

ex

4

sh pu to trip

RIN GE

LIN S ER t N M pac

Io

1

m co

250N

2 Nm

1

P93083

MERLIN GERIN compact

NS250 N

OFF

Ui 750V. Uimp 8kV. Icu Ue (kA) (V) 85 220/240 36 380/415 35 440 30 500 8 660/690 50 250 cat A Ics=100% Icu

M

IEC947-2 UNE NEMA UTE VDE BS CEI push to trip

.95

3

.98

2

8 Im

E

E/G

5

ON R

ST

22 Ir

.93

64/ h pus to trip

.98

R

ST

Io

A

.63

.8 xIo

.9

1

.8

4 T

t

s

t

c

3

te

le s

1 .85

co co nn S nn T1 ec ec 08 tio tin ... g n 41 to 8

G it k

Im

s

t

E

R

L

IN

xIr

co co nn S nn TR ec ec 22 tintio ... g n 58 to

A

60

=1

11

t

tes

10 2

.98

In

9

8 3

te bs at t

4

7

5 4

.95

M

.93

.9

e

6

1 .85

.5 xIn

Im

4 3 E 3 6 R (T 2 IN ) /36 7 0 1 /2

Im

1

.7

Ir

Ih

SE

.88 .9

.8

60

=1

.5 xIn

)

r %I rm 905 10

ala

22 Ir

t

tes

xIr

.88

Io

A

1,5

7

10 2

(S

R

6

8 3

1

0A 16

64/ h pus to trip

ST

Im 5 4

.95

te

OFF

.93

.98

1 .8 xIo

.7 .63

SE

8

.85

In

1

r %I rm 905 10

ala

22 Ir

.9

2

.9 1

0A 16

.95

.88

.8

3

2

SE

.9 Io

ed

tripp

S

22 S

STR

Ir

xIr

xIn

T

alarm

6

10

1.5

1

.63

STR 22 SE

90 %Ir 105 5

4

.9

.85 .8 .7

TES

160/250A

Im

Ir

In=250A

.8 xIo

cat

.7 .63

Ir

.5 xIn

3

928

no 2

Im

62

433

A

160

M5 6x 2 in 6x.

A 144 .9 = 136.8A In x = Io = o x .95 820.8A I Ir =GERIN Ir x 6 = MERLIN Im =


NS400 H

compact

C 1001 H

Ui 750V. Uimp 8kV. Icu Ue (kA) (V)

OFF

100 70 65 40 35

220/240 380/415 440 500/525 660/690

3

cat B Icw 8kA / 0,25s. Ics = 100% Icu IEC 947-2

UTE VDE BS UNE NEMA

Ui 750V. Ue (V)

Uimp 8kV. Icu (kA)

220/240 380/415 440 500/525 660/690

100 70 65 40 35

8

In ex:

m 8m in .31

cat B Icw 6kA / 0,25s Ics = 100% Icu IEC 947-2 UTE VDE BS UNE NEMA

CEI

In = 400A

CEI

PUSH TO TRIP

push to trip

60 70 80 90

STR 55UE

fault

Ir

test

Im

I

OFF

Ih

t

Io

STR 53 UE

Ir

Io .8

.63

.9

.93 .95

.8

1

.88

tr

T

tm

test

120 60

240

ON I

th

tm

15 Ir

Im I

4

5

1.5

10

2

240

(s) at 1.5 Ir

6

3

8

2

.3

0

6

12

0 2 I t off

fault

test

µP

8 10

>Ir Ic .88

.93 .95

.85

.98

.9

.1

on

4

1.5

.3 .2

.2

R

x In

x Ir

tm (s)

.1

30

E

E/G

22 S

STR

105 %Ir

90

I

3

.98

x Io

x In

tr

T

TES

75

60

Im

.85 1

.5

tr

xIn

i

400

105 %Ir

.8

>Im

1

TFR

1

d

pe

trip

OFF

t

se

re

O F OF

1

64/ h pus to trip

R

ST

a

22 Ir

SE .93

.95

.9 .98 Io

sh pu to trip

RIN GE LIN S ER t N M pac m co

.88 .9

1

1

.85

.8

60

=1

In

.8 xIo

.7 .63

Ir

2

.5 xIn

Im

1

Nm

■ Merlin Gerin ■ Square D ■ Telemecanique

4

A

ex:

60A

In 1

discovering your circuit breaker

the toggle operated circuit breaker ..................................... 4 the motor mechanisms .................................................................... 5 the circuit breaker with rotary handle ....................................... 7 electrical auxiliaries .......................................................................... 8

Merlin Gerin

3

the toggle operated circuit breaker

rating plate MERLIN GERIN

posative contact indication range

E32507

compact NS160 H

Compact NS circuit breakers are suitable for isolation as defined by IEC 947-1 et 947-2.

model (rating and breaking capacity) standardised characteristics: v Ui = rated insulation voltage v Uimp = impulse withstand voltage v Ue = rated operational voltage v Icu = ultimate breaking capacity v Ics = service breaking capacity

Ui 750V. Uimp 8kV. Ue (V) 220/240 380/415 440 500/525 660/690 250

Icu (kA) 100 70 65 50 10 85

When the toggle is in the "OFF" position, the main contacts are ALWAYS open. It is therefore possible to carry out maintenance on the downstream circuits. When doing so, it is advised to lock the circuit breaker in the OFF position and to comply with applicable servicing regulations for low voltage circuits.

colour indicating the type of device: v yellow = E v silver = N v pink = H v blue = L v green = switch

Ics = 100% Icu cat A

symbol indicating suitability for isolation as defined by IEC 947.2

IEC 947.2

main standards with which device conforms

UTE VDE BS CEI UNE NEMA

Resetting following a trip When the circuit breaker is in the "tripped" position it must first be reset by moving the toggle to the OFF position before reclosing is possible.

E32505

circuit breaker with toggle upstream connections

rating plate (see above) MERLIN GERIN compact NS160 H

E32506

fixing hole

indication of closed (I/ON) position

I

ON "I" closing

Ui 750V. Uimp 8kV. Ue (V) 220/240 380/415 440 500/525 660/690 250

Icu (kA) 100 70 65 50 10 85

tripped toggle (shown in tripped position) push to trip


indication of open (O/OFF) position

O

OFF "O" reset

circuit identification

IEC 947.2 UTE VDE BS CEI UNE NEMA

push to trip

In=100A .8

Io

Im

x In

.88

.93 .95

.85

.98

.9 1

.5 Ir

Ir

.9

.7 .63

.8

x Io

1

trip unit rating "push to trip" button

40/100

STR 22 SE

alarm

%Ir 90 105

STR 22 SE Im 6

5 4

7

3

+

-

trip unit (see page 11)

8 10

2

x Ir

test

fixing hole downstream connections

4

Merlin Gerin

the motor mechanisms

The motor mechanism module can be used to open and close the circuit breaker and charge the operating mechanism spring via electrical signals. Its position and small dimensions leave trip unit settings visible and accessible. It can be tipped forward for access to connections ans auxiliaries (voltage releases, indication switches).

E32508

NS100 to 630 motor mechanisms upstream connection

lock for access to electrical auxiliaries circuit identification "off" position keylock (option available on NS400/630 only)


2

NS400 H Ui 750V. Uimp 8kV. Ue Icu (V) (kA)

spring-charging lever (stored-energy mechanism) rating plate (see page 4) main contacts position indicator (1)

cat B Icw 6kA / 0,25s. Ics = 100% Icu

I ON

charged

IEC 947-2 UTE VDE BS UNE NEMA

(1) main contacts position indicator E32509

100 70 65 40 35

CEI

In = 400A

manu

O

I

push OFF

push ON

auto

STR 53 UE Io .8

1

.5

+

-

.93 .95

.85 x Io

tr 120 60

Im

75

4

tm .3 (s)

2

I

6

3

6

T

> 105 %Ir

90

5

2 8 1.5 x Ir 10

1 240

60

4 3

.98 .8

x In

tr

Ir

.9 .88

.5 8

.4

2 10 1.5 x In 12

.3

test

.3

2

manual/automatic operation selector (3)

.4 .3

> Ih

open/isolated

charged

spring charged spring discharged

(3) manual/automatic operation selector : c in manual mode, electrical control signals are inhibited, c in automatic mode, only electrical control signals are executed.

push button to open contacts

> Im

OFF

discharged

fault

> Ir

.8 .2 x In 1

O

(2) mechanism status indicator

µP

.6 .7

th (s) .4

.3

Ih

closed

mechanism "charged/ discharged" indicator (2)

push button to close contacts .63

ON

Isolation is guaranteed when the indicator signals OFF.

operations counter (option available on NS400/630 only)

1

I

"off" position locking with a padlock (see page 40)

E32510

220/240 380/415 440 500/525 600/690

E32511

operation cycle in manual mode

O

OFF

I

O

push ON

push OFF

I

charged

(locking in position is possible)

ON

fault

or

discharged

O

OFF

discharged

(locking in position is possible)

manual spring charging

operating cycle in automatic mode automatic spring charging ON

OFF

fault

O

OFF

I

charged

ON

discharged

O

OFF

discharged

manual spring charging

manual spring charging manu/auto

determine cause of fault

manu/auto to

u/au

man

O push

OFF

I push

ON

(9 times)

O Merlin Gerin

OFF

discharged

O

OFF

charged

5

the motor mechanisms

The motor mechanism module can be used to open and close the circuit breaker via electrical signals. Its position and small dimensions leave trip unit settings visible and accessible. It can be tipped forward for access to connections ans auxiliaries (voltage releases, indication switches).

E33379

C801 to C1251 type T motor mechanism upstream connections keylock to block handle

Manual operation is possible by opening the transparent front cover : c breaks the electrical circuit. c gives access to the operating handle (open - close). c allows the device to be locked by up to 3 padlocks.

I front cover giving access to the manual control MERLIN GERIN compact

C801 Ui 750V. Uimp 8kV. Ue Icu (V) (kA) 220/240 380/415 440 500/525 660/690

rating plate

100 70 65 50 20

I

cat B Icw 6kA / 0,25s. Ics = 100% Icu

lock position open

IEC 947-2 UTE VDE BS UNE NEMA

CEI

In = 400A

O manual operating handle

O

STR 55UE

60 70 80 90

105 % Ir


fault

Io

.63

.8

t

Ir

test

Ir Ic1

.5

tr

1

.85 .8

Im

Ih th

+

tm

S

–

B

C 801 N•H L C 1001 N•H L 10 8 15 8

C 1251N•H 10 12

i

–

4

I

5

1

2 1.5

240

xIr

.3

Ih

6

.1 .85 .8 0

0

I2t

off

.4

.3

A

xIn

.5 .2

B

xIn

.4

.9 .2

.1 480

8

8 3 10 2 .3

.2

xIr

.6

.4

.95 .3

.3

.2

.2

1

.1 on

I2t

.1 off

Ic1

at 1.5Ir

tr

5

6 4

on

+ T

xIo

120 60 30 15

I

A

.9

.95 3

xIn

TFR

Im

tm

th

downstream connections

Position "ON" closed

E33382

E33381

E33380

Locking by 3 padlocks

Position "OFF" open

I I

I

O

O

O

60 70 80 90

O

105 % Ir

fault

6

Merlin Gerin

the circuit breaker with rotary handle

E32512

circuit breaker with rotary handle

The direct and extended rotary handles do not inhibit: c visibility of and access to trip unit settings, c positive contact indication (suitability for isolation), c indication of the three positions: O, I, "tripped", c access to the trip test buttton marked "push to trip".

upstream connection

keylock to block handle (option)

ON

on-position indicator

I

handle locking using a padlock circuit identification tripped

Compact NS100 to 630 optional handles: the following accessories are available : c MCC version (motor control and command), c machine tool version.

tripped-position indicator


rotary handle reset

STR 22 SE .8

Io

.7

x In

alarm

%Ir 90 105

trip button marked "push to trip"

Im

.88

.93 .95

4

7

.85

.98

3

8

.9 1

.5 Im

Ir

.9

.63 Ir

OFF

1

.8

x Io

6

5

10

2

x Ir

+

-

E32513

In=100A

off-position indicator

O

push to trip

I/ON (closed)


test

ON

downstream connection

I

tripped

rating plate (see page 4)

closing

tripped

reset

reset

O OFF

O/OFF (open isolated)

circuit breaker equipped with an extended rotary handle

The extended rotary handle comprises : c a case mounted on the Compact NS in place of the front cover (1), c an extension shaft (2), c an assembly fixed to the door (handle and front) (3).

E32514

1 2 ON I

3

O OFF

ON I

Options : Telescopic shaft for devices mounted on a withdrawable chassis. With the exception of the rating plate and the "push to trip" button, the extended rotary handle provides the same information as the direct rotary handle, and is achieved in the same manner. Access to the trip unit settings and the "push to trip" test button is possible when the door is open. Compact C801 to C1251 option : includes the same components as the door interlocking version, but is only available with a short extension shaft. CAM (early make/break contacts) c a single early break changeover contact, used to operate pre-tripping mechanisms. c a double early make contact. Both these contacts are mounted in the 'handle front box' for both the direct and extended versions.

O OFF

Merlin Gerin

7

OF1 SD

E32518

E32517

E32516

E32515

electrical auxiliaires

SDE OF2

SD OF (2) OF1 OF2 OF3

MN/MX MN/MX

SD SDE

(1)

SD

Compact NS80

MN/MX

OF2

MITOP

SDV

MN/MX OF1

SDV

OF3

SDE

Compact NS100/160/250 + Vigi (optional) (1) slot for: c a MITOP release if the circuit breaker is fitted with an electronic trip unit; c an adapter required if the circuit breaker is fitted with a thermal-magnetic trip unit and an SDE contact. (2) slot for auxiliary connections for STR53UE trip unit options.

All auxiliaries are located behind the circuit breaker front plate, the motor mechanism module or the rotary handle, in a compartment insulated from the power circuits. Function and terminal markings are embossed on the circuit breaker frame for each slot. Auxiliary contacts and releases are physically identical for all ratings.

8

Compact NS400/630 + Vigi (optional) Compact C801/1001/1251

A single type of auxiliary contact is used for all indication functions (OF, SD, SDE, SDV). The contact function is determined by the slot it occupies in the circuit breaker. Auxiliary contacts snap easily into position. Connections are made via integrated screw terminals.

Merlin Gerin

electrical auxiliaries

E18608

auxiliaries switches

Auxiliary contacts remotely indicate circuit breaker positions. Contact OF NC and NO changeover contact. This auxiliary contact indicates the position of the circuit breaker contacts (open or closed).

E23839

For NS100 to NS630

For C801 to C1251

E18609

voltage releases

Contact SDE fault trip indication. This auxiliary contact indicates that the circuit breaker has tripped due to an electrical fault: c overload, c short-circuit, c insulation fault detected by the Vigi module. Switch SD trip indication. This auxiliary contact indicates that the circuit breaker has tripped due to one of the following: c overload, c short-circuit,

Voltage releases are used to trip the circuit breaker voluntarily by means of an electric signal (e.g. emergency off button).

c earth fault, c an MX or MN release, c pressing of the "Push to trip" button, c racking in or out, c manual opening on the front of the motor mechanism module. Contact SDV insulation fault indication. This auxiliary contact indicates that the circuit breaker has tripped due to an earth fault. Contact CAM early make/break contact which mounts in the rotary handle. Option COM (communication). For transmission of data using the Dialpact protocol.

Release MX This shunt release trips the Compact NS as soon as the voltage across its terminals reaches 70% of the rated voltage.

Release MN This undervoltage release trips the Compact NS when the voltage in its control circuit drops below 70% of the rated voltage. The circuit breaker can be reclosed as soon as the voltage has reached 85% of the rated value.

Merlin Gerin

9

10

Merlin Gerin

how to setup your trip unit

trip unit settings - general comments introduction ............................................................................................. 12 Compact NS100-160-250 A ................................................................... 14 Compact NS400-630 A ........................................................................... 15 Compact C801-1001-1251 A .................................................................. 16

trip unit settings - details thermal - magnetic : TM16D to TM250D ................................................................................. 17 electronic : STR22SE - STR22GE ............................................................................ 18 STR23SE ................................................................................................ 20 STR53UE ............................................................................................... 21 STR25DE and STR25DE (*) (fine adjustment) ....................................... 24 STR35SE/GE ......................................................................................... 26 STR45AE ................................................................................................ 27 STR45BE ................................................................................................ 28 STR55UE ............................................................................................... 29

increased setting range with 150 and 250 A CTs ................ 22 remote indication and electronic trip unit options STR22SE, STR23SE, STR53UE ........................................................... 23 STR45AE/BE, STR55UE ........................................................................ 30

testing of electronic trip units STR22SE, STR23SE, STR53UE ........................................................... 31 STR25DE, STR35DE/GE ....................................................................... 31 STR45AE/BE, STR55UE ........................................................................ 31

electronic trip unit settings for motor protection STR22ME ............................................................................................... 32 STR43ME ............................................................................................... 33 STR35ME ............................................................................................... 34

Merlin Gerin

11

trip unit settings - general comments

overload protection Tripping time depends on the level of the fault: c the circuit breaker will trip within 2 hours for a current equal to : v 120% of Ir for electronic trip units, v 130% of Ir for thermal-magnetic trip units. c the circuit breaker must not trip for a load under 105% of Ir.

c Compact circuit breakers can also be fitted with a Vigi earth-fault protection module that trips the circuit breaker in the event of an insulation fault (risk of electrocution or fire due to earth leakage current).

All Compact trip units (NS100 to NS630) incorporate the reflex-tripping system, an exclusive Merlin Gerin feature that ensures discrimination, even for very high short-circuit currents.

E32521

The trip unit is the component that monitors the electrical current flowing through the circuit breaker and opens the circuit breaker in the event of a fault. c thermal-magnetic and electronic trip units detect overloads and shortcircuits;

STR 53 UE Ir

Io .63

.8

.88

.93 .95

.85

.98

.9

60

75

STR 53 UE Ir

5 Io

4

.63

.8

3

6 1

.5 x In

1

.5 x In

+

-

2 1.5

+

tr

test

tm

1

.8 x Io

tr 120 60

240

Ir Im I

m .3

s)

.2

x Ir

-8

.9 .88

60

4Im

.93 .95

4

2 1.5

.98 1

.8 x Io

240

60

15

tm .3

2 1.5 (s)

x Ir

75

8

2 1.5

10

.2

.1

.1

0

on

I

0

2 I t off

x In

6

4

3

.3

T Ih

> 105 %Ir

90

6

6

.2

240

(s) at 1.5 Ir

I

5

3

3

.85

tr 120 30

10

> 105 %I

90

Im

8 x In

.5

.8 .2

th (s)

x In

.4

1

> Ir > Im

.4

.3

.3

.2

.2

on

fault

µP

.7

.3

10 11

10 11

test

.6

.4

8

> Ih

.1 .1 2 I t off

.3 .2

short circuit protection The tripping is : c time delayed as soon as the current exceeds the Im threshold. c instantaneous as soon as the current exceeds the I threshold. The ME trip units conform to IEC 947-4.1 (motor protection).

12

Merlin Gerin

E31303

terminology of the overload and short-circuit protection settings

1

Io x Ir

2

tr Ic2

Ic1

6

6

adjustable for all modeles

fixed for : TM16D to 250D STR22SE / 22GE / 22ME, STR23SE, STR25DE, STR35SE / GE / ME adjustable for : STR43ME, STR53UE, STR45AE / BE, STR55UE

Im

3

fixed for : TM16D ≤ 160 / TM16G to TM63G, STR22ME adjustable for all other models

fixed for: TM16D to 250D STR22SE / GE / ME, STR23SE, STR25DE / GE

ON

tm

4

adjustable for : STR45AE / BE STR35SE / GE, STR43ME, STR53UE, STR55UE

OFF

7

Ih

5 ON

th

OFF

I

adjustable for : STR53UE, STR55UE

8

Long time protection against overloads 1 Io = coarse adjustment (function of In) Ir = fine adjustment

2

tr = long time delay fixed or adjustable depending on the trip unit

Short circuit protection 3 Im = short circuit threshold, I2t curve in position ON or OFF (depending on the trip unit) Merlin Gerin

fixed for : STR22SE / GE / ME, STR23SE / GE, STR35SE / GE / ME, STR43ME

4

tm = short circuit time delay fixed or adjustable,

Instantaneous protection 5 I = instantaneous threshold, fixed or adjustable depending on the trip unit

Earth fault protection fault threshold, 7 Ih = insulation I2t curve in position ON or OFF

8 6

th = earth fault time delay

Ic1 = adjustable load shedding threshold for STR45, STR53 and STR55 Ic2 = adjustable load shedding threshold for STR45 and STR55 13


Compact NS100-160-250A 2 interchangeable families

E32522

thermal-magnetic trip unit 440 500/525 660/690 250

Trip unit identification TM 250 D

65 50 10 85


mini/maxi value of thermal protection

O

trip unit identification


push to trip

Ir Ir

In=160A

Im Im

.85 .9 .95 .8 .7 1 .98 .63 1 .9

4

5

200/250A

69

3

8 .82 1.5 10

x In x 250A

x Ir

90 %Ir 5 105

10

rating STR 22 SE TM 250 D

alarm

50/60Hz

250A / 40°C

6

test

trip unit rating and reference temperature

7

8

x 250A

type D : standard trip unit G : low magnetic-threshold trip unit

IrIr

magnetic setting (or value if fixed) for short-circuit protection

Im Im

family TM = thermal-magnetic MA = magnetic

thermal setting for overload protection

E32523

electronic trip unit 440 500/525 660/690 250

Trip unit identification STR 22 SE

65 50 10 85


E : IEC P : UL

O


trip unit identification

push to trip

In=160A In=100A

STR Im 22 SE

Ir

.85 .9 Io .9 .8 .8 .95 .7

.7 .63 .63 Ir

Im

1

.98 .5 1

x In

x In

3

4 Ir5

.88

.9

.93 6 .95

2 8 .85 1.5.8 101 .98 x Ir x Io

40/100

90 %Ir alarm 105 %Ir 90 105

alarm

short time setting (Im) for short circuit protection

STR 22 SE Im 50/60Hz 5

4

6

7

3 8 10 Ir 2 Im x Ir

+

test

-

test

type S : selective trip unit G : generator protection trip unit M : motor protection trip unit

test connector (see page 31) alarm (see page 23)

long time setting Io x Ir (LR) for overload protection Io : base setting Ir : fine adjustment

rating group 2 : NS100/160/250

number of settings family STR = electronic

trip unit rating (calculation basis for settings)

14

Merlin Gerin

Compact NS400-630 A electronic trip unit STR53UE E32531

trip unit identification push to trip

indication/alarm (see page 23)

160/400A 160/400A

short time setting for short circuit protection (Im) STR 53 UE Io .63

.8

1

.5 x In

+

tr

test

tm

60

Ir .88

.93 .95

.85

.98

.9

x Io

240

60

6

3

2 1.5

8

2 1.5

(s)

30 (s) at 1.5 Ir

x Ir

10

.3

x In

.5 8

.4

.7

.3

.8 .2

th (s)

1

> Im

.3 .2

.2

.2

2 I t off

on

0

> Ir

.4

.3

.1 0

x In

.4

fault

µP

.6

10 11

.1 on

test

Ih 6

.2

240

Ir Im I

I 4

3

tm .3

T

> 105 %Ir

90

5

4

1

.8

tr 120

75

Im

.1 .1 2 I t off

> Ih

instantaneous setting for short circuit protection (I) slot for the SD option "fault indication" long time setting (LR) for overload protection Io : base setting Ir : fine adjustment slot for options "earth-fault" or "load monitoring" short time time-delay setting (tm) long time time-delay setting (tr) test connector (see page 31)

Trip unit identification STR 53 UE

E : IEC P : UL type S : selective trip unit U : universal trip unit M : motor protection trip unit

rating group 3 : NS400/630 number of settings family STR = electronic

Merlin Gerin

15


C801-1001-1251 A exclusively electronic trip unit identification

E32868

indication/alarm (see page 30)

long time setting (LR) for overload protection Io : base setting Ir : fine adjustment

O

short time setting for short circuit protection (Im) STR 55UE

60 70 80 90

105 % Ir

fault

Io

.63

t

.8

Ir

test

Ir Ic1

.5

4

I

tr

1

.85 .8

Im

Ih

+

tm

th

S

–

30 15

I C 801 N•H L C 1001 N•H L A 10 8 B 15 8

C 1251N•H 10 12

i

–

6

8 3 10 2

B

6 4

2 1.5

xIn

.1 .85 .8 0

0

I2t

off

.4

.3

A

xIr

xIn

.6

.4

.95 .3

.3

.2

.2

1

instantaneous setting for high short circuit protection (I)

.5 .2 .4

.2

.1 480

8

.9

.3

.2

.1 on

I2t

adjustment for earth fault threshold (Ih)

.1 off

Ic1

at 1.5Ir

tr

xIr

.3

240

on

+ T

xIo

120 60

1

Ih

5

5

.95 3

xIn

TFR

Im

.9

tm

th

adjustment for earth fault time delay (th) load monitoring control

adjustment for short circuit time delay (tm)

adjustment for overload time delay (tr) test socket (see page 31)

Trip unit identification STR 5 5 U

E standard E : IEC P : UL

application I : isolator D : distribution S : selective G : generator protection M : motor protection U : universal B : selim circuit breaker 5 : C801/1001/1251 number of settings family STR = electronic

16

Merlin Gerin

E33456

trip unit settings - details thermal-magnetic TM16D to TM250D

t

1

3

1

Ir

Im

10

5

9 1

.8

.9

6

3

7

8

x 250A

TM 250 D 250A / 40°C

x 250A

Ir

Im

E32524

0

Ir

Im

.9

.8

E32525

x 250 A

5

8

7

x 250 A

.9

.8

x 250 A

63 50.4 56.7 63

80 64 72 80

100 80 90 100

125 100 112.5 125

160 128 144 160

200 160 180 200

250 200 225 250

80

100

125

160

200 1000 1200 1400 1600 1800 2000

250 1250 1500 1750 2000 2250 2500

Magnetic short-circuit protection setting

6 8

0.8 0.9 1

trip unit rating (A) 16 25 40 12.8 20 32 14.4 22.5 36 16 25 40

7

x 250 A

trip unit rating (A) 16 25 40

5 6 7 8 9 10

Im = 250 A x 8 = 2000 A

Merlin Gerin

I

Ir = 250 A x 0.9 = 225 A

5

9 1

setting

6

Im 10

Ir

Im

Thermal overload protection 10 9

1

Ir

63

d fixe

The circuit breaker trips instantaneously when the current exceeds 2000 A.

17

E32563

trip unit settings - details electronic STR22SE and STR22GE

t

1 1

3

In=100A

STR 22 SE .8

Ir

Io

.9

.7 .63 Im

Im

.93 .95

4

7

.85

.98

3

8

.5 Ir

3

%Ir 90 105

.88

.9 1

alarm

1

.8

+

-

10

2

x Io

x In

6

5

x Ir

test

0

Ir

Im

I

E32526

electronic trip unit STR22SE and GE rating 40, 100, 160, 250 A .8

Io

.63 .5

x In

18

Long time overload protection

Im

.88

4

7

.85

.98

3

8

.9 1

.7

Ir

.93 .95

.9

.8

1

x Io

5

2

6

10

x Ir

STR22SE 40 A Io (coarse setting) 0.5 0.63 0.7 0.8 0.9 1

Ir (fine adjustment) 0.8 0.85 0.88 16 17 17,5 20 21 22 22,5 24 24,5 25,5 27 28 29 30,5 31,5 32 34 35

0.9 18 22,5 25 29 32 36

0.93 185 23 26 29,5 33,5 37

0.95 19 23,5 25,5 30 34 38

0.98 19,5 24,5 27,5 31 35 39

1 20 25 28 32 36 40


Ir (fine adjustment) 0.8 0.85 0.88 40 42,5 44 50,5 53,5 55,5 56 59,5 61,5 64 68 70,5 72 76,5 79 80 85 88

0.9 45 57 63 72 81 90

0.93 46,5 59 65 74,5 83,5 93

0.95 47,5 60 66,5 76 85,5 95

0.98 49 62 68,5 78,5 88 98

1 50 63 70 80 90 100


Ir (fine adjustment) 0.8 0.85 0.88 64 68 70,5 81 86 89 89,5 95 98,5 102,5 109 112,2 115 122,5 127 128 136 141

0.9 72 91 101 115 129,5 144

0.93 74,5 94 104 119 134 149

0.95 76 96 106,5 121,5 137 152

0.98 78,5 99 110 125,5 141 157

1 80 101 112 128 144 160

Merlin Gerin


Eg.

In

Ir (fine adjustment) 0.8 0.85 0.88 100 106 110 126 134 138,5 140 149 154 160 170 176 180 191 198 200 212,5 220

0.9 112,5 142 157,5 180 202,5 225

0.93 116 146,5 163 186 209 232,5

0.95 119 150 166 190 214 237,5

0.98 122,5 154 171,5 196 220,5 245

1 125 157,5 175 200 225 250

160 A

Io

0.5 0.63 0.7 0.8 0.9 1 coarse setting 128 A

Ir

0.8 0.85 0.88 0.9 0.93 0.95 0.98 1

E32527

Ir = 128 A x 0.9 = 115 A

.8

Io

.9

.9 1

.7 .63

.88

Ir

.93 .95

4

.98

3

.85 .5

x In

.8

1

x Io

5

With an electronic trip unit, the short circuit threshold is a multiple of the overload setting.

Short-circuit protection

Im

6 7 8

2

10

x Ir

Eg. In

160 A

Io

0.5 0.63 0.7 0.8 0.9

1

Ir

0.8 0.85 0.88 0.9 0.93 0.95 0.98 1 Ir = 128 A x 0.9 = 115 A

Im

2

3

4

5

6

7

8

Im = 115 A x 5 = 575 A

Merlin Gerin

10

The device trips instantaneously when the current exceeds 575 A.

19

E32565

trip unit settings - details electronic STR23SE

t

3

1

STR 23 SE Io .8 .9

1

.5

.88 .85 .8

Im

.9 .93 .95 .98 1

x In

+

90 105 %Ir

alarm

Ir

.7 .63

1

5

6

4 3 2

x Io

7 8 10

3

x Ir

Ir

-

Im

test

0

Ir

Im

I

E32529

The trip unit rating for the STR23SE and STR53UE is fixed by the current transformer within the circuit breaker.

8

Io

9

.7 .63

Overload protection

Im

.88

.93 .95

4

7

.85

.98

3

8

.9 1

Ir

.5

1

.8

x In

5

10

2

x Io

6

x Ir

Compact NS400 Io (coarse setting) 0.5 0.63 0.7 0.8 0.9 1

Ir (fine adjustment) 0.8 0.85 0.88 160 170 176 202 214 222 224 238 246 256 272 282 288 306 316 320 340 352

0.9 180 227 252 300 324 360

0.93 186 234 260 298 334 372

0.95 190 239 256 304 342 380

0.98 196 247 274 314 352 392

1 200 252 280 320 360 400

Compact NS630 Io (coarse setting) 0.5 0.63 0.7 0.8 0.9 1

Ir (fine adjustment) 0.8 0.85 0.88 252 268 277 318 337 349 352 374 388 403 428 443 453 481 498 504 535 554

0.9 284 357 396 472 510 567

0.93 293 369 410 469 527 586

0.95 299 377 418 479 538 598

0.98 309 389 432 494 555 617

1 315 397 441 504 567 630

Example of protection settings Eg.

In

400 A

Io

0.5 0.63 0.7 0.8 0.9 1 coarse setting 320 A

Ir

0.8 0.85 0.88 0.9 0.93 0.95 0.98 1

E32530

Ir = 320 A x 0.93 = 298 A

8

Io

9

.7

1

.63 .5

x In

Ir

.88

4

7

.85

.98

3

8

.8

1

x Io

5

2

The short circuit threshold is a multiple of the overload setting.

Short circuit protection

Im

.93 .95

.9

6

10

x Ir

Eg.

In

400 A

Io

0.5 0.63 0.7 0.8 0.9

Ir

1

0.8 0.85 0.88 0.9 0.93 0.95 0.98 1 Ir = 320 A x 0.93 = 298 A

Im

2

3

4

5

6

7

8

10

Im = 298 A x 7 = 2086 A For a NS400 circuit breaker with 400 A CTs, the STR23SE trip unit is calibrated at 400 A

20

Merlin Gerin

E32567

trip unit settings - details electronic STR53UE

t

8

1

3

2

4

5

7

6

1 2

STR 53 UE Ir

.63

.8

1

.5 x In

.93 .95

.85

.98

.9

tr 120 30

2 1.5

8

2 1.5

.6

.4

.7

10 11

.3

.8 .2

th (s)

x In

.4

1

.2

.2

2 I t off

on

trip unit adjustment STR53UE

4

> Im

.1 0

3

> Ir

.4 .3

.1 on

x In

fault

µP

.3

.2

0

(s) at 1.5 Ir

10

.5

test

8

.3

.2

240

15

Ir Im I

6

4 3

(s)

60

test

tm

I 6

x Ir

T Ih

> 105 %Ir

90

3

tm .3

240

75

5

4

1

.8 x Io

-

+

tr

.88

60

Im

> Ih

5

.1 .1 2 I t off

0

Ir

Im

I

I

Overload protection Compact NS400 Io (coarse setting) 0.5 0.63 0.8 1

Ir (fine adjustment) 0.8 0.85 0.88 160 170 176 202 214 222 256 272 282 320 340 352

0.9 180 227 300 360

0.93 186 234 298 372

0.95 190 239 304 380

0.98 196 247 314 392

1 200 252 320 400

Compact NS630 Io (coarse setting) 0.5 0.63 0.8 1


0.9 284 357 472 567

0.93 293 369 469 586

0.95 299 377 479 598

0.98 309 389 494 617

1 315 397 504 630

c instantaneous tripping threshold (I); c overload protection delay (tr); c short circuit protection delay (tm).

Short circuit time delay

overload time delay

E33465

Trip unit STR53UE provides an even finer balance between safety and service continuity for installations with special characteristics (for example induction furnaces, fluorescent lighting, arc-welding systems, SCR-based regulation systems, etc.), by the use of three additional settings:

E33478

Io

4

tm

0...0,3 s

0...0,3 s

I2t off

2

tr

15...240 s

tm on I2t

E32532

Options : see page 23.

Io .63

Ir .8

1

.5

x In

Im

.88

.93 .95

.85

.98

.9

.8

1

x Io

4

I

5

4

3

6

3

2 1.5

8

2 1.5

10

x Ir

6 8 10 11

x In

Increased short circuit protection with the adjustable instantaneous threshold, I Eg.

In

I

1.5

The tripping time is faster than that of the short circuit time delay. The threshold is a function of the circuit breaker rating.

400 A 2

3

4

6

8

10 11

I = 400 A x 6 = 2400 A Merlin Gerin

21

increased setting range with 150 and 250 A CTs

trip unit adjustment STR23SE

trip unit adjustment STR53UE

22

Overload protection NS400 (150 A) Io (coarse setting) 0.5 0.63 0.7 0.8 0.9 1

Ir (fine adjustment) 0.8 0.85 0.88 60 63,76 66 75,6 80,32 83,16 84 89,25 92,4 96 102 105,6 108 114,75 118,8 120 127,5 132

0.9 67,5 85,05 94,5 138 121,5 135

0.93 69,75 87,88 97,65 111,5 125,55 139,5

0.95 71,25 89,77 99,75 114 128,55 142,5

0.98 73,5 92,61 102,9 117,6 132,5 147

1 75 94,5 105 120 135 150

NS400 (250 A) Io (coarse setting) 0.5 0.63 0.7 0.8 0.9 1

Ir (fine adjustment) 0.8 0.85 0.88 100 106,25 110 126 133,87 138,6 140 148,75 154 160 170 176 180 191,25 198 200 212,2 220

0.9 112,5 141,75 157,5 180 202,5 225

0.93 116,25 146,57 162,75 185 209,25 232,5

0.95 118,75 149,62 166,25 190 213,75 237,5

0.98 122,5 154,35 171,5 196 220,5 245

1 125 157,6 175 200 225 250

Overload protection NS400 (150 A) Io (coarse setting) 0.5 0.63 0.8 1

Ir (fine adjustment) 0.8 0.85 0.88 60 63,76 66 75,6 80,32 83,16 96 102 105,6 120 127,5 132

0.9 67,5 85,05 138 135

0.93 69,75 87,88 111,5 139,5

0.95 71,25 89,77 114 142,5

0.98 73,5 92,61 117,6 147

1 75 94,5 120 150

NS400 (250 A) Io (coarse setting) 0.5 0.63 0.8 1

Ir (fine adjustment) 0.8 0.85 0.88 100 106,25 110 126 133,87 138,6 160 170 176 200 212,2 220

0.9 112,5 141,75 180 225

0.93 116,25 146,57 185 232,5

0.95 118,75 149,62 190 237,5

0.98 122,5 154,35 196 245

1 125 157,6 200 250

Merlin Gerin

remote indication and electronic trip unit options STR22SE, STR23SE, STR53UE

indication E32533

alarm LED

STR 23 SE

alarm

90 105 %Ir

90 105 %Ir

E32534

alarm

60

60 75

STR 53 UE

75

> 105 %Ir 90 > 105 %Ir 90

E26031

options forSTR53UE test

fault µP

For Compact NS100/160/250: STR22SE or STR23SE The LED lights and remains lit when the load exceeds 90 % of Ir.

The LED blinks for an overload (u 105% Ir), warning that the circuit breaker may trip.

For Compact NS400/630 : STR53UE The 4 LEDs indicate the load level: c 60 / 75 / 90 % : the load is high and care should be taken to ensure that the 105% threshold is not exceeded;

c 105 % : There is an overload and the unit may trip. Shedding of non-priority loads.

Option F, fault indication This option can be fitted to the STR53UE (Compact NS400 or NS630). Following a trip, press the fault test button for an indication of the cause:

c µP : internal microprocessor fault, c > Ir : overload or circuit breaker over-temperature, c > Im : short-circuit (or instantaneous), c > Ih : earth fault protection.

> Ir > Im

Example of threshold setting :

E32693

E26030

> Ih

R

6

Ic1

In

0,8...1 Ir

1

400 A Io

0.5 0.63 0.8

Ic

coarse setting 320 A

.93

.9 .88

.95

.85

.98

Ir

0.8 0.85 0.88 0.9 0.93 0.95 0.98 1 Ir = 320 A x 0.93 = 298 A

1

.8

1

Ic

0.8 0.85 0.88 0.9 0.93 0.95 0.98 1 Ic = 298 A x 0.95 = 283 A

It is generally used to disconnect nonpriority circuits in the event of an overload (load shedding).

T .5

Ih

.6

.4

.7

.3

.8

tripping threshold adjustment Ih = 0.2 to 1 x In

E32692

E32691

E26029

load-shedding control - option R This function allows remote indication of whether the load is above or below the threshold, Ic.

7

Ih

0,2...1 In

7

Ih

0,2...1 In

.2 x In 1

th (s) .4

.4

.3

.3

.2

.2

on

.1 .1 2 I t off

tripping time adjustment

0,1...0,4 s ON I2t

0,1...0,4 s I2t OFF

th

8

th 8

Earth fault protection - option T This function will trip the circuit breaker in the event of a fault to earth on a TNS system.

Merlin Gerin

23

E32679

trip unit settings - details electronic STR25DE

1

3 t

1 STR 25DE

60 70 80 90

t

Ir

test

Ir

I

.9

105 % Ir

4

5

.95 3 .85 .8

I

+

xIo

2 1.5

1

6

xIr

8 10

–

3

i

E33457

0

.9

Ir

4 .95

.85

Compact C801N/H/L

5 6

setting

2

8

Ir (A) Compact C1001N/H/L

10

1.5

x Io

x Ir

setting

1

1

Ir (A) Compact C1251N/H/L setting

E33458

Ir (A)

.9

Ir

4 .95

I

5

3

6

.8

1

x Io

I

Example : In = 1000 A, Ir = 800 A Im = 4000 A

1

In = 800 A 1

0.95

0.9

0.8

0.7

0.63

0.5

0,4

800 760 In = 1000 A

720

640

560

504

400

320

1

0.95

0.9

0.8

0.7

0.63

0.5

0,4

1000 950 In = 1250 A

900

800

700

630

500

400

1

0.95

0.9

0.8

0.7

0.63

0.5

0,4

1250

1187

1125

1000

875

787

625

500

1

In

1000 A

Ir

0.4 0.5 0.63 0.8 0.9 0.95 1

8

2

.85

I

Setting STR25DE

3

1

.8

I

Ir

1.5

Ir = 0,8 x 1000 = 800 A

10

x Ir 3

Im

1.5

2

3

4

5

6

8

10

Im = 5 x Ir = 4000 A

24

Merlin Gerin

E32680

trip unit settings - details electronic STR25DE (*) (fine adjustment)

1

1

3 t

1 STR 25DE (*) Io

.63

60 70 80 90

.8

t

Ir

test

Ir

I

.9

105 % Ir

4

5

.95 3 .5

1

.85 .8

xIn I

+

xIo

1

6

2 1.5

xIr

8 10

–

3

i

0

E33459

(*) fine adjustment

Io .63

.9

.8

.5

1

Ir

4 .95

.85

5 6

2

8 10

1.5

x Io

x Ir

Compact C801N/H/L Io 0,5 0,63 0,8 1

1 Ir 1 400 504 640 800

Compact C1001N/H/L 1 Io 0,5 0,63 0,8 1

Ir 1 500 630 800 1000

Compact C1251N/H/L 1

E33460

Io 0,5 0,63 0,8 1

Io .63

.8

.5

1

x In

.9

Ir

4 .95

I

5 6

3 2

.85 .8

1

x Io

I

Ir 1 625 788 1000 1250

Example : C1001N : In = 1000 A, Ir = 720 A, Im = 3600 A,

In = 800 A 0.975 390 491 624 780

0.95 380 479 608 760

0.925 370 466 592 740

0.9 360 454 576 720

0.875 350 441 560 700

0.85 340 428 544 680

0,8 320 403 512 640

0.925 463 583 740 925

0.9 450 567 720 900

0.875 438 551 700 875

0.85 425 536 680 850

0,8 400 504 640 800

0.925 578 728 925 1156

0.9 563 709 900 1125

0.875 547 689 875 1094

0.85 531 669 850 1063

0,8 500 630 800 1000

In = 1000 A 0.975 488 614 780 975

0.95 475 599 760 950

In = 1250 A 0.975 609 768 975 1219

0.95 594 748 950 1188

In 1

1000 A

Io

0.5 0.63 0.8

1

base setting 800 A

8 1.5

I

Setting STR25DE (*)

3

1

.8

x In

I

Ir

10

x Ir

2

Ir

0.8 0.85 0.875 0.9 0.925 0.95 0.975 1 Ir = 800 x 0,9 = 720 A

3

Im

1.5

2

3

4

5

6

8

10

Im = 720 x 5 = 3600 A

Merlin Gerin

25

E32681

trip unit settings - details electronic STR35SE/GE

1

1

3

4 t

1

Ir STR 35SE Io

60 70 80 90

.63

t

.8

Ir

test Ir

.5

1

105 % Ir

Im

.9

4

3

5

.95 3

120s

.85 .8

xIn Im

+

tm

xIo

1

–

6

2 1.5 .3

Im

8 10 .2

4

.1 0

on

0

I2t

off

i

tm

C 1251N•H 12

E33461

0

Io .63

.9

.8

.5

1

Ir

.85

6

2 1

.8

x In

5

4 3

8 1.5

x Io

10

x Ir

Compact C801N/H/L Io 0,5 0,63 0,8 1

1 Ir 1 400 504 640 800

Compact C1001N/H/L 1 Io 0,5 0,63 0,8 1

Ir 1 500 630 800 1000


E33462

Io 0,5 0,63 0,8 1

Io .63

.5

.9

.8

1

Ir

Im

4 .95

.85 .8

x In

5

3

6

2

8 1.5

1

x Io

Ir

Im

I

I

Setting STR35SE/GE

Im

.95

1,5...10Ir

.3

.1

A

C 801 N•H L C 1001 N•H L A x In 15 8

xIr

.2

I 1,5 Ir

0,4...1In

Ir 1 625 788 1000 1250


In = 800 A 0.975 390 491 624 780

0.95 380 479 608 760

0.925 370 466 592 740

0.9 360 454 576 720

0.875 350 441 560 700

0.85 340 428 544 680

0,8 320 403 512 640

0.925 463 583 740 925

0.9 450 567 720 900

0.875 438 551 700 875

0.85 425 536 680 850

0,8 400 504 640 800

0.925 578 728 925 1156

0.9 563 709 900 1125

0.875 547 689 875 1094

0.85 531 669 850 1063

0,8 500 630 800 1000

In = 1000 A 0.975 488 614 780 975

0.95 475 599 760 950

In = 1250 A 0.975 609 768 975 1219

0.95 594 748 950 1188

In 1

Io

2

Ir

1000 A 0.5 0.63 0.8 1 coarse setting 800 A

10

x Ir

0.8 0.85 0.875 0.9 0.925 0.95 0.975 1 Ir = 800 x 0,9 = 720 A

E32690


3

Im

1.5

2

3

4

5

6

8

10

4 Im = 720 x 5 = 3600 A

tm I2t

0...0,3 s

0...0,3 s

off

tm on I2t

C801 N/H L C1001N/H L C1251N/H

A B 26

10 8 15 8

10 12 Merlin Gerin

E32682

trip unit settings - details electronic STR45AE

1

2

4

1

3 t

Ir

0,4...1In

1 STR 45AE

60 70 80 90

2

105 % Ir

fault

Io

.63

t

.8

Ir

test

Ir Ic1

.5

tr

1

.85 .8

Im

Ih

+

tm

th

S

–

Ih

5

C 801N•H C 1001N•H C 1251N•H 23

6

2 1.5

1

.3

240

–

+ T

xIr

480

0

.1 .85 .8 0

.95 .3

off

xIn

.4

.4

xIr

4

.3

.2 1

.2 .1

on

I2t

.1 off

tm

th

18

E33461

0

Io .63

.9

.8

.5

1

Ir

4

.85

5

3

6

2 1

.8

x In

8 1.5

x Io

10

x Ir

E32689

Overload time delay

Compact C801N/H/L Io 0,5 0,63 0,8 1

1 Ir 1 400 504 640 800

Compact C1001N/H/L 1 Io 0,5 0,63 0,8 1

2

tr

15...480 s

Ir 1 500 630 800 1000


E33462

Io 0,5 0,63 0,8 1

Io .63

.9

.8

.5

1

Ir

Im

4 .95

.85 .8

x In

5

3

6

2

8 1.5

1

x Io

Ir

Im

I

I

SettingSTR45AE

Im

.95

1,5...10Ir

.6

Ic1

at 1.5Ir

tr

.9

.3

I2t

3 Im

.5 .2

.2

.1

.4

.3

8 10

.2

on

i

A

20

xIo

120 60 30 15

I

A x In

4

.95 3

xIn

TFR

Im

.9

Ir 1 625 788 1000 1250


In = 800 A 0.975 390 491 624 780

0.95 380 479 608 760

0.925 370 466 592 740

0.9 360 454 576 720

0.875 350 441 560 700

0.85 340 428 544 680

0,8 320 403 512 640

0.925 463 583 740 925

0.9 450 567 720 900

0.875 438 551 700 875

0.85 425 536 680 850

0,8 400 504 640 800

0.925 578 728 925 1156

0.9 563 709 900 1125

0.875 547 689 875 1094

0.85 531 669 850 1063

0,8 500 630 800 1000

In = 1000 A 0.975 488 614 780 975

0.95 475 599 760 950

In = 1250 A 0.975 609 768 975 1219

0.95 594 748 950 1188

In

1000 A

1

Io

0.5 0.63 0.8 1 coarse setting 800 A

2

Ir

10

x Ir

0.8 0.85 0.875 0.9 0.925 0.95 0.975 1 Ir = 800 x 0,9 = 720 A

Short circuit time delay E33465

3

Im

1.5

2

3

4

5

6

8

10

4 Im = 720 x 5 = 3600 A

tm I2t

0...0,3 s

off

0...0,3 s

tm on I2t

Options : voir page 30 Merlin Gerin

27

E32683

trip unit settings - details electronic STR45BE

1

2

1

3

4 t

Ir

0,4...1In

1 STR 45BE Io

60 70 80 90

.63

.8

t

Ir

test

Ir

Im

.9

4

Ih

5

.95 3 .5

1

.85 .8

tr

xIn

Im

Ih

+

tm

th

S

120 60

xIo

240

– 30 15

6

2 1.5

1

.3

T

–

+ T

xIr

8 10 .3

.4 .2

.3

.1

.2

0

0

It 2

off

3 Im

.5 .2

.1 480

.4

.3

.2

on

i

2

105 % Ir

xIn

.4

4

.3 .2 .1

on

.1

It 2

off

at 1.5Ir

tr

tm

th

E33461

0

Io .63

.9

.8

.5

1

Ir

4

.85

5

Compact C801N/H/L

3

6

2

8

1

.8

x In

1.5

x Io

10

x Ir

Io 0,5 0,63 0,8 1

1 Ir 1 400 504 640 800


Overload time delay E33479

Io 0,5 0,63 0,8 1

2

tr

15...480 s

Ir 1 500 630 800 1000


E33462

Io 0,5 0,63 0,8 1

Io .63

.5

.9

.8

1

Ir

Im

4 .95

.85 .8

x In

5

3

6

2

8 1.5

1

x Io

Ir

Im

I

Setting STR45BE

Im

.95

1,5...10Ir

.6

Ir 1 625 788 1000 1250


In = 800 A 0.975 390 491 624 780

0.95 380 479 608 760

0.925 370 466 592 740

0.9 360 454 576 720

0.875 350 441 560 700

0.85 340 428 544 680

0,8 320 403 512 640

0.925 463 583 740 925

0.9 450 567 720 900

0.875 438 551 700 875

0.85 425 536 680 850

0,8 400 504 640 800

0.925 578 728 925 1156

0.9 563 709 900 1125

0.875 547 689 875 1094

0.85 531 669 850 1063

0,8 500 630 800 1000

In = 1000 A 0.975 488 614 780 975

0.95 475 599 760 950

In = 1250 A 0.975 609 768 975 1219

0.95 594 748 950 1188

In

1000 A

1

Io

0.5 0.63 0.8 1 coarse setting 800 A

2

Ir

10

x Ir

0.8 0.85 0.875 0.9 0.925 0.95 0.975 1 Ir = 800 x 0,9 = 720 A

E33466


3

Im

1.5

2

3

4

5

6

8

10

4 Im = 720 x 5 = 3600 A

tm

0...0,3 s

I2t off

tm

0...0,3 s

on I2t

Options : voir page 30 28

Merlin Gerin

E32684

trip unit settings - details electronic STR55UE

1

2

4

1

3

5 t

1

Ir STR 55UE

60 70 80 90

0,4...1In

2

105 % Ir

fault

Io

.63

t

.8

Ir

test

Ir Ic1

.5

4

I

5

.95 3

tr

1

.85 .8

xIn Im

Ih

+

tm

th

S

–

I C 801 N•H L C 1001 N•H L A 10 8 B 15 8

TFR

Im

.9

C 1251N•H 10 12

–

i

2 1.5

1

120 60

240

30 15

480

xIr

.3

8

0

0

I2t

.1 .85 .8

off

xIn

.4

.1

.1

xIr

4

.3

.2 1

.2

on

I2t

off

Ic1

at 1.5Ir

tm

E33463

.63

Ir 1

4

.9

.8

.5

Im .95

.85

.8

x In

Compact C801N/H/L

6

5

3

6

4

8

2

8

3

A

1.5

1

x Io

10

2

B

x In

x Ir

E32689

Overload time delay

Io 0,5 0,63 0,8 1

1 Ir 1 400 504 640 800

Compact C1001N/H/L 1 Io 0,5 0,63 0,8 1

2

tr

15...480 s

Ir 1 500 630 800 1000


E33464

Io 0,5 0,63 0,8 1

Io

Ir

.63

.8

.5

1

x In

Im

.9

4 .95

.85

I

5

5

6

3

6

4

8

2

8

3

A

1

1.5 10

x Io

x Ir

.8

2

Ir

B

Ir 1 625 788 1000 1250

Example : C1001N : In = 1000 A, Ir = 720 A, Im = 3600 A, I = 6000 A

0.975 390 491 624 780

I

0.95 380 479 608 760

0.925 370 466 592 740

0.9 360 454 576 720

0.875 350 441 560 700

0.85 340 428 544 680

0,8 320 403 512 640

0.925 463 583 740 925

0.9 450 567 720 900

0.875 438 551 700 875

0.85 425 536 680 850

0,8 400 504 640 800

0.925 578 728 925 1156

0.9 563 709 900 1125

0.875 547 689 875 1094

0.85 531 669 850 1063

0,8 500 630 800 1000

In = 1000 A 0.975 488 614 780 975

0.95 475 599 760 950

In = 1250 A 0.975 609 768 975 1219

0.95 594 748 950 1188

In 1

1000 A

Io

0.5 0.63 0.8

1

coarse setting 800 A

x In

Ir

0.8 0.85 0.875 0.9 0.925 0.95 0.975 1 Ir = 800 x 0,9 = 720 A

3

E32690

I

In = 800 A

Short circuit time delay Im

1.5

2

4

3

4

5

6

8

10

Im = 720 x 5 = 3600 A 5

tm

Im

Setting STR55UE

I

5

2...A/B x In

5 I

th

0

Io

1,5...10Ir

.6

.4 .95 .3

.2

3 Im

.5 .2

B

.9

.3

.4

.3

A

xIn

.1

tr

Ih

6

8 3 10 2

.2

on

+ T

xIo

5

6 4

0...0,3 s

I

2

3

4

5

6

8

A

B

0...0,3 s

I2t off

tm

I = 6 x In = 6000 A

on I2t C801 N/H L C1001N/H L C1251N/H

A B

10 8 15 8

10 12

Options : voir page 30 Merlin Gerin

29

remote indication and electronic trip unit options STR45AE/BE, STR55UE

E26031

LED alarme test

Fault indication - option F this option is not available on the STR45BE.

E23534

indication fault

60

STR 53 UE

µP

60 75

75

> 105 %Ir 90 > 105 %Ir 90

> Ir > Im

E26030

E32693

STR45AE/BE STR55UE options

E32694

> Ih

6

Ic1

R

6 0,8...1 Ir

Ic2

0,5...1 Ir

Ic .93

.9 .88

.95

.85

.98 1

.8

T .5

Ih

.6

.4

.7

.3

.8

E32692

E23691

E26029

Load shedding control - option R Ic1 = 0,8 to 1 6 Ic2 = 0,5 to 1

7

Ih

0,2...0,6 In

7

Ih

0,2...0,6 In

.2 x In 1

th (s) .4

.4

.3

.3

.2

.2

on

.1 .1 2 I t off

0,1...0,4 s ON I2t

0,1...0,4 s I2t OFF

th

8

th 8

Earth fault protection - option T earth fault protecyion setting for your network 7 Ih = 0,2 to 0,6 In I2t = constant : ON or OFF 8 th = 0,1 to 0,4 s

30

Merlin Gerin

testing of electronic trip units STR22SE, STR23SE, STR53UE, STR25DE, STR35SE/GE STR45AE/BE, STR55UE testing of electronic trip units E23858

mini test kit

A test socket on the front of the electronic trip units enables connection to a mini test kit or calibration test kit. These kits tests trip unit operation and circuit breaking tripping.

E23857

calibration test kit

MERLIN

Merlin Gerin

GERIN

The calibration test kit checks the protection systems by measuring the real tripping times: c at 1.5 x Ir (overload protection), c at 1.5 x Ir (short circuit protection), c at 0.8 x In (earth-fault protection). This apparatus checks that the trip unit is operational and that the breaker will trip.

31

E26985

trip unit settings - details electronic STR22ME, STR35ME for motor protection t

E32564

1 1 2

Ir In=50A

ImSTR 22 ME

Ir 37.5 40 35.5 42.5 33.5

7,2Ir

45

31.5

u1,05 Ir

3 4

IEC 947.4 / cl.10

7,0s

5

47.5 30

A

50

Ir

13 Ir

test

0

Protection settings (STR22ME) c overload protection, adjustable threshold Ir 1 , conformes to tripping class 10 according to IEC 947-4-1 2 ; c protection against single phase operation : initiates circuit breaker opening in 3.5 to 6 s ; c short circuit protection : v fixed threshold, Im (13 x Ir) 3 , v fixed time delay 4. c instantaneous protection against high short circuits, fixed threshold (13 x In) 5 .

trip unit STR22ME rating(A) adjustment thresholds (A) 40 24 25.5 27 28.5 50 30 31.5 33.5 35.5 80 48 51 54 57 100 60 63 67 71 150 90 95 101 107 220 132 140 148 157

30 37.5 60 75 113 166

Ir

32 40 64 80 120 177

13Ir

34 42.5 68 85 127 187

36 45 72 90 135 198

I

38 47.5 76 95 142 209

40 50 80 100 150 220

Indication as standard Indication of load by diode on front face : c non operational for I < 1.05 x In ; c flashes for I u 1.05 x In.

32

Merlin Gerin

E32566

E26987

trip unit settings - details electronic STR43ME for motor protection

2

1

t

1

3

2 µP

STR 43 ME Io

Ir .8

.7

.88

1

A

+

tr

.90.93

8

.98

11

3

12

7

1

.8

13

6

x Io

tr

-

>Im

9 10

.95

.85

.6

>Ir

Im

4

x Ir

10

5

test

tm

10A Ir Im I

class

20 7.2 tr

Protection settings (STR43ME) c overload protection : v adjustable threshold, Ir 1 , v adjustable long time delay 2 , conformes to trip unit classes types 5, 10 and 20 according to IEC 947-4.1 ; c protection against single phase operation : initiates circuit breaker opening in 4 s ± 10% ; c short circuit protection : v adjustable threshold, Im (6 to 13 x Ir) 3 , v fixed time delay 4 ; c instantaneous protection against high short circuits, fixed threshold (13 x In) 5 .

0

Ir

I

Overload protection settings Compact NS400 Io (coarse setting) 0.5 0.63 0.7 0.8


0.9 180 227 252 300

0.93 186 234 260 298

0.95 190 239 256 304

0.98 196 247 274 314

1 200 252 280 320

Compact NS630 Io (coarse setting) 0.5 0.63 0.7 0.8


0.9 284 357 396 472

0.93 293 369 410 469

0.95 299 377 418 479

0.98 309 389 432 494

1 315 397 441 504

E32529

Example of protection settings

8

Io

9

.7

.9 1

.63

Ir

.88

.93 .95

4

.98

3

.85 .5

x In

5

1

.8

Eg. In

Im

7 8 13

6

x Io

6

Io Ir

400 A 0.5 0.63 0.7 0.8 0.9 1 coarse setting 320 A 0.8 0.85 0.88 0.9 0.93 0.95 0.98 1

x Ir Ir = 320 A x 0.93 = 298 A

Io

8

9

.7

.9 1

.63

.88

Ir

4

.98

3

.85 1

.5

.8

x In

x Io

E33816

Im

.93 .95

5

Im

6

6

7

8

9

10 11 12 13

7

Ir ==320 Im 298AAxx10 0.93==2980 298 A

8 6

13

x Ir Increased setting range with 150-250 A CTs

Merlin Gerin

NS400 (150 A) Io (coarse setting) 0.5 0.63 0.7 0.8

Ir (fine adjustment) 0.8 0.85 0.88 60 63,76 66 75,6 80,32 83,16 84 89,25 92,4 96 102 105,6

0.9 67,5 85,05 94,5 138

0.93 69,75 87,88 97,65 111,5

0.95 71,25 89,77 99,75 114

0.98 73,5 92,61 102,9 117,6

1 75 94,5 105 120

NS400 (250 A) Io (coarse setting) 0.5 0.63 0.7 0.8

Ir (fine adjustment) 0.8 0.85 0.88 100 106,25 110 126 133,87 138,6 140 148,75 154 160 170 176

0.9 112,5 141,75 157,5 180

0.93 116,25 146,57 162,75 185

0.95 118,75 149,62 166,25 190

0.98 122,5 154,35 171,5 196

1 125 157,6 175 200 33

E32685

trip unit settings - details electronic STR35ME for motor protection 1

1

3

4 t

OFF 1

STR 35ME

60 70 80 90 on

Io

off

t

1

Ir

test Ir

.8

105 % Ir

Im

.9

4

5

.95 3

6

3

.63 .5

xIn

120s

off

.85 .8

Im

+

tm

off

–

xIo

2 1.5

1

.3

.1 0

0

It 2

off

i

A

C 801 N•H L C 1001 N•H L A x In 15 8

4

.2

.1 on

1,5 Ir

.3

.2

I

LR inopérant LT inopérative Ir = In

xIr

8 10

tm

C 1251N•H 12

E33467

0

Io

.9

1

.8 .63

off

.5

Ir .95

.85

5

3

6

2 1

.8

x In

8 1.5

x Io

10

x Ir

Compact C801N/H/L Io 0,5 0,63 0,8 1

1 Ir 1 400 504 640 800

Compact C1001N/H/L 1 Io 0,5 0,63 0,8 1

Ir 1 500 630 800 1000


E33468

Io 0,5 0,63 0,8 1

Io

.9

1

.8 .63 .5

off

Ir

Im

4 .95

.85

6

2

8

1

1.5 10

x Io

x Ir

.8

x In

5

3

Ir 1 625 788 1000 1250

0.975 390 491 624 780

E32690

I

0.95 380 479 608 760

0.925 370 466 592 740

0.9 360 454 576 720

0.875 350 441 560 700

0.85 340 428 544 680

0,8 320 403 512 640

0.925 463 583 740 925

0.9 450 567 720 900

0.875 438 551 700 875

0.85 425 536 680 850

0,8 400 504 640 800

0.925 578 728 925 1156

0.9 563 709 900 1125

0.875 547 689 875 1094

0.85 531 669 850 1063

0,8 500 630 800 1000

In = 1000 A 0.975 488 614 780 975

0.95 475 599 760 950

In = 1250 A 0.975 609 768 975 1219

Example : C1001N : In = 1000 A, Im = 6000 A,

0.95 594 748 950 1188

In 1

Io

1000 A 0.4 0.5 0.63 0.8

1 OFF

pre-rating 1000 A

3

oveload protection inoperative

Im

1.5

2

3

4

5

6

8

10

Im = 6 x In = 6000 A

4

tm

I

In = 800 A

Ir Short circuit time delay

Im

Settings STR35ME

Im

4

Ir

0...0,3 s

0...0,3 s

I2t off

tm on I2t

C801 N/H L C1001N/H L C1251N/H

A B

34

10 8 15 8

10 12

Merlin Gerin

supplementary functions

Vigi bloc and Visu bloc ........................................................ 36 plug-in base ........................................................................................ 37 withdrawable chassis for Compact NS100 to 630 .............. 38 universal chassis for Compact C801 to 1251 ....................... 39 locking options ................................................................................. 40 locking and lead sealing ............................................................... 41

Merlin Gerin

35

Vigi bloc and Visu bloc

Vigi bloc E32869

380/415 440 500/525 660/690 250

70 65 50 10 85


O


push to trip

In=100A .8

Io

.63

%Ir 90 105

Im

.88

.93 .95

4

.85

.98

3

.9 1

.5

.8

6

5

1

7

+

-

8 10

2

x Io

x In

Im

alarm

Ir

.9

.7

Ir

40/100

STR 22 SE

x Ir

test

avant test diélectrique enlever ce couvercle

310 150 60

before dielectric test remove this cover

R

∆t(ms)

0

vigi MH 3

NS 100/160 NHL 200/440 V - 50/60 Hz

N

1

3

5

2

4

6

I∆n(A) T

HS 0.03 (∆t = 0)

reset push-button rating plate

-25

10

1 0.3

vigi

intermediate terminal shield (1) sealable fixing screw for the intermediate terminal shield sealing point for plate blocking access to the settings plate blocking access to the settings test push-button

The Vigi bloc provides residual current protection against indirect contact and the risk of fire and destruction due to faults to earth. It actuates the trip unit by means of a direct mechanical action. The Vigi bloc can be fitted with an alarm contact (SDV) which can be used to remotely indicate that the device has tripped due to an earth fault . The "Test" push button allows regular verification that the Vigi bloc is operational by simulating an earth fault. The test cannot be carried out with the circuit braker in the open position. The "Reset" push button. After all trips initiated by the Vigi, this button must be pressed in order to reset the Vigi.

slot for SDV auxiliary switch (optional)

trip time delay settings (2) sensitivity settings

(1) The intermediate terminal shield is necessary in order for the Vigi to function. (2) When the device is set to 30mA, any time delay selected is nullified i.e. instantaneous operation.

E32870

rating plate avant test diélectrique enlever ce couvercle before dielectric test remove this cover

vigi type of Vigi module

NS 100/160 NHL 200/525 V - 50/60 Hz

operational voltage and frequency

-25 N

1

3

standardised symbols: (see page 4)

5

T 2

4

6

-25

immunity to current 8/20 wave and electromagnetic environment class A immunity to DC components (6 mA insensitivity) minimum operating temperature as per VDE 664 schematic diagram

The Visu bloc The standard fixed versions of the Compact circuit breakers exist in ratings 100 A to 1250 A. A Visu bloc can be directly connected, which provides visible break isolation according to French standard NF C 13.100 : the contacts are visibles through a transparent cover, and are operated by means of a handle. The Visu bloc is padlockable as standard with barrel locking optional. Specific auxiliaries are available for the Visu bloc : auxiliary contacts, terminal shields, etc. The Compact NS100/630 and C801/ 1251 can be equiped, as an option, with a pre-tripping mechanism preventing the "on-load" opening of the Visu bloc.

36

The Visu bloc must be fitted with a CAM contact and the circuit breaker with a voltage release. Connection c fixed front connected. The Compact circuit breakers with Visu bloc are delivered ready for connection by bars or cables fitted with lugs (see page ?) ; c connection of bare cables : upstream by a set of terminals for the Visu bloc and downstream a set of teminals for the Compact; v accessories : the Visu bloc can be fitted with terminal spreaders, right angle terminals, terminal extensions and lugs. c fixed rear connected : by adaptation of the Compact's specific rear connectors with the Visu bloc, delivered per pole.

The Compact circuit breakers with Visu bloc can be fitted with specific short terminal shields (rear connection) or standard long terminal shields (front connection), both of which are lead sealable (see page ??). Accessories Compact NS100/630 with Visu bloc can be fitted with : c in the Visu bloc : auxiliary contacts (OF, CAM), Ronis or Profalux barrel locks, a contact to earth the neutral (obligatory if the tansformer neutral is earthed downstream of the Compact with Visu bloc), etc. c in the Compact NS frame : all the Compact NS auxiliaries.

Merlin Gerin

E32520

plug-in version

unplugging

E32519

the plug-in circuit breaker

push to trip

E32541

1 - open the circuit breaker.

push to trip

3 - pull the circuit breaker out horizontally. The auxiliary circuits are disconnected by the automatic auxiliary connector block located at the back of the device.

push to trip

Safety mechanism If the circuit breaker is closed (I/ON position) when pulled out, advanced opening ensures operator safety, i.e. the poles automatically open before the power connections are withdrawn.

2 - remove the two fixing screws.

plugging in

1 - open the circuit breaker. 2 - plug the circuit breaker in. 3 - refit the fixing screws. 4 - the circuit breaker is ready for operation.

degree of protection against direct contact with the power circuits

c device plugged in: IP40 (with terminal shields), c device unplugged: IP20, c device unplugged and base fitted with safety shutters: IP40.

Merlin Gerin

37

E32538

chassis mounted plug-in circuit breaker

E32539

withdrawable chassis for Compact NS100 to 630

disconnection CLAC ! CLAC !

push to trip

E32540

1 - open the circuit breaker.

push to trip

3 - simultaneously pull down on the two handles until the two locking levers "clack". the auxiliary circuits are disconnected at the same time as the power circuits, unless the device is equipped with a manual auxiliary connector (see below). Advanced opening ensures operator safety, as with the plug-in version.

push to trip

2 - turn the two locking levers.

1 - disconnect the circuit breaker (as above). 2 - unplug the manual auxiliary connector (if installed). 3 - turn the two locking levers, as for disconnection.

4 - push the two handles down. 5 - pull the circuit breaker out forwards.

connection

1 - turn the two locking levers. 2 - simultaneouly push up the two handles.

Connection of the auxiliary circuits and circuit breaker advanced opening occur as for disconnection.

degree of protection with circuit breaker disconnected or removed

c no special equipment: IP20, c base fitted with safety shutters: IP40.

auxiliary circuit test

indication contacts (optional)

38

E23894

removal

This function is available when the circuit breaker is equipped with the manual auxiliary connector. Following disconnection, the circuit breaker can be operated (toggle, "push to trip" button) to check the auxiliary circuits are still connected.

Changeover contacts: c "end-of-connection (fully connected)" contact, c "end-of-disconnection (fully withdrawn)" contact. Merlin Gerin

the withdrawable circuit breaker and universal chassis 11

10 9 8

7

1

2

3

4

5

6

1

door interlocking (optional)

2

2 'racked-out' auxiliary contacts (optional)

3

position indicator

4

locking by 3 padlocks in the 'racked-in' (or 'racked-out') position

5

racking handle storage

6

locking in the withdrawn (or 'racked-out') position (optional)

7

racking interlock (optional)

8

2 'racked-in' auxiliary contacts (optional)

9

extraction operators (1)

The universal chassis for Compact C801 to C1251 is particularly well suited to main incoming circuit breakers : c racking in and out is possible with the door closed by means of a racking handle which is normally stored in the base of the chassis ; c 2 positions (racked-in and rackedout) are indicated : v locally by a position indicator, v remotely by auxiliary contacts (2 racked-in contacts and 2 racked-out contacts) ; c the circuit breaker can be operated from the exterior of the panel.

Door cut-out A set of 'surrounds' allow : c optimises the number of cut-outs : only 1 cut-out per circuit breaker : v 3 and 4 poles, v toggle or direct rotary handle operated ; c guarantees a degree of protection to IP 40. This set comprises : c a frame for the chassis front plate, which gives access to the locking facilities and racking mechanism (see below) ; c a frame for the circuit breaker handle with window to view trip unit settings.

Locking A wide range of locking options : c chassis locking in both the racked-in and racked-out positions by 3padlocks and 2 barrel locks, accessable from the panel exterior ; c door interlocking, with the breaker racked-in ; c can be locked in the racked-in position with the panel door open.

Fixation c rear : panel or rail mounted ; c on a shelf : solid or rails. Power connections c by cables with crimped lugs ; c by flat or edgewise bars. Auxiliary connections The standard Compact C withdrawable terminal block. frame for chassis front plate

E33469

E32687

universal chassis for Compact C801 to 1251

frame for toggle operation with window to view trip unit settings

frame for rotary handle operation with window to view trip unit settings

10 connector for withdrawable terminal block (optional) 11 safety shutters IP 40 (optional)

Door front covers and surrounds

Merlin Gerin

39

locking options

c locking in the OFF/O position guarantees isolation according to IEC 947-2.

toggle

function

means

locking device in position O locking device in position O or I

padlock

E23896

E23895

Whatever locking method is chosen, the circuit breaker will always trip in the event of a fault. c each device is able to accept between 1 and 3 padlocks of diameter 5 to 8 mm.

padlock

accessories required removable lock. device fixed locking device

for circuit breaker NS100…630 C801…C1251 c c

accessories required – locking device and keylock

for circuit breaker NS100…630 C801…C1251 c c c c

accessories required –

for circuit breaker NS100…630 C801…C1251 c

c

push to trip

push to trip

E32537

standard direct rotary handle

function

means

locking device position O

padlock keylock

function

means

locking device position O device in position I : door opening prevented door open: device closing prevented

padlock rotary handle (integral)

–

c

function

means

locking in OFF position O door opening prevented device in I position: door opening prevented door open: device closing prevented

padlock



ON I

ppr roo ffa all uux x

O OFF

MMC type direct rotary handle

extended rotary handle

E23899

motor mechanism

2

keylock rotary handle (integral)

function

means

locking in OFF position O motor mechanism locked out

padlock keylock

c –



1 locking device

c

c

push to trip

1

auto

O

u

man

40

push

OFF

I push

ON

1 - set the selector on the front to the manual position. 2 - pull the locking lever. 3 - fit the padlock(s).

It is then impossible to actuate the spring charging lever, the closing pushbutton and the manual/automatic operation selector.

Merlin Gerin

locking and lead sealing

withdrawable chassis E23900

function connection prevented lock in connected or disconnected position

means padlock keylock

accessories required – locking device and keylock

push to trip

seal E23905

different lead sealing systems

inhibited operations front cover fixing screw

c removal of front cover c access to auxiliaries

E23906

c removal of trip unit rotary handle fixing screw

c removal of the rotary handle c access to auxiliaries

E23907

c removal of trip unit motor mechanism cover locking screw

c removal of the motor mechanism c access to auxiliaries

E23908

c removal of trip unit transparent protection plate for trip unit settings

changes in settings: c for overload protection

E23909

transparent protection plate for Vigi module settings

changes in settings for earth fault protection

E23910

c for short-circuit protection

intermediate terminal shield on Vigi module

c disabling of earth fault protection function

E23911

c access to power connection (protection against direct contact)

interlocking Prevents closing of a circuit breaker when another is already closed.

Merlin Gerin

terminal shield fixing screw

function interlocking of 2 circuit breakers fitted with toggle interlocking of 2 circuit breakers fitted with rotary handle

access to power connections (protection against direct contact)

means double-bolt mechanical device mechanical device 2 keylocks (1 key)

41

42

Merlin Gerin

operational conditions

environmental conditions ............................................................. 44 commissioning and exploitation ............................................... 46 operational anomalies .................................................................... 48 practical advice ................................................................................. 49

Merlin Gerin

43

environmental conditions

ambient temperature

operation

Ambient temperature between –25°C and +40 °C: The rated characteristics for Compact NS circuit breakers are guaranteed if the temperature of the air immediately surrounding the device is within the above range. Ambient temperature between +40°C and +70°C : Take into account the derating coefficients presented in the technical documents: c for circuit breakers with a thermalmagnetic trip unit, there is a natural drop in the thermal tripping threshold (overload protection), c for circuit breakers with an electronic trip unit, there is a drop in the maximum setting authorised for overload protection.

installation is not guaranteed if the circuit breakers operate at temperatures greater than 70°C. Ventilation (natural or forced-air) should be provided for switchboards to avoid temperatures greater than 70°C.

storage and commissioning In their original packing, Compact NS circuit breakers may be stored at temperatures ranging from -55°C to +95°C. Commissioning should be carried out at normal ambient temperatures (see above). However, commissioning may exceptionally be carried out at an ambient temperature ranging from -35°C to -25°C.

Ambient temperature above +70°C: Various systems trip the circuit breaker to protect components from the effects of excessive temperature. It follows that continuity of service for the electrical

special atmospheric conditions

vibrations

44

Compact NS circuit breakers operate within their rated characteristics in all normal climatic conditions. They have successfully passed (no drop in rated characteristics) the tests defined by the following standards: c IEC 68-2-2 : dry heat at +85°C, c IEC 68-2-1 : dry cold at –55°C, c IEC 68-2-30 : damp heat (temperature + 55°C, relative humidity 95 %), c IEC 68-2-11 : salt spray.

Compact NS circuit breakers are designed to operate in industrial atmospheres as defined in IEC standard 947 (pollution degree i 3).

Compact NS circuit breakers are guaranteed against mechanical or electromagnetic vibration levels as specified in the following standards: c IEC68-2-6, c Veritas NI122E, c Lloyd's Register of Shipping, c JIS 8370.

Excessive vibration may however provoke untimely tripping, loosening of connections or even rupture of parts.

It is however advised to ensure that the circuit breakers are installed in correctly cooled switchboards without excessive dust.

Merlin Gerin

altitude

electromagnetic disturbances

Compact NS circuit breakers are designed to operate within their rated characteristics at altitudes up to 2 000 metres.

Above 2 000 m, modifications in the ambient air characteristics (dielectric withstand capacity, cooling capacity) result in the following derating:

altitude (m) maximum operating voltage(V) rated thermal current (A) at 40°C

i 2000 690 In

Compact NS circuit breakers equipped with an electronic trip unit and a Vigi module are protected against: c overvoltages produced by electromagnetic switchgear, c overvoltages produced by atmospheric disturbances and conducted by electrical networks (eg. lightning strikes), c devices emitting radio waves (radio transmitters, walkie-talkies, radar, etc.), c electrostatic discharges produced directly by operators.

3000 600 0,96 x In

4000 480 0,93 x In

They pass EMC (electromagnetic compatibility) tests in compliance with the following international standards: c IEC 255-22-1 class 3: v 10 kV 1.2 / 50 µs overvoltage wave, v 2.5 kV1 MHz damped oscillatory wave, c IEC 1000-4-2 class 4: electrostatic discharges 15 kV, c IEC 1000-4-3 class 3: 10 V/m radiated electromagnetec fields, c IEC 1000-4-4 class 4: 4 kV fast transient waves, c IEC 1000-4-5 class 4: v 4 kV 1.2 / 50µs voltage waves, v 2 kA 8 / 20 µs current waves, c EN 50081-1 class B: conducted and radiated emissions in switchboards, c IEC 947-2 annex F. The above tests ensure: c absence of nuisance tripping, c overload tripping times.

Merlin Gerin

45

commissioning and exploitation

prior to commissioning new circuit breakers or following an extended shutdown

A general check requires only a few minutes and eliminates any risks of incorrect operation due to error or neglect.

prior to commissioning periodically during service life following servicing on the switchboard periodically during an extended shutdown following an extended shutdown

A B C D E F

electrical tests switchboard inspection conformity with diagram device mounting, connectionsauxiliaries mechanical operation

All checks must be carried out with the switchboard de-energised. For compartmented switchboards, it is sufficient that all accessible sections be de-energised. A c

B c

C c c

(1)

c c c

(2)

D c c c c c

E c c c c

F c

c c

G c c c c

G operation of the electronic trip units and the Vigi modules. (1) extended shutdown or modifications in the switchboard (2) modification in the switchboard

electrical tests

Insulation and dielectric withstand capacity tests are carried out prior to delivery of the switchboard. These tests are governed by applicable standards and must always be carried out by an authorised specialist.

switchboard inspection

Check that the circuit breakers are installed in a clean environment, free of dust and all installation debris (tools, wiring, chips, metal particles, etc.).

compliance with diagram

Check the conformity of devices with the installation diagram: v ratings and breaking capacities indicated on the rating plates, v trip unit identification (type, rating), v presence of additional functions (Vigi earth fault protection, motor mechanism, rotary handle, auxiliaries, indication and measurement modules),

v protection settings (overload, shortcircuit, earth fault), v outgoing circuit identification on the front of devices, v for Vigicompact earth fault protection circuit breakers, check that the intermediate terminal shield is installed, otherwise the earth fault protection function is inoperative.

device mountingstatus of connections and auxiliaries

Check device mounting in the switchboard and the tightness of power connection.

Check that auxiliaries and accessories are correctly installed: v motor mechanism modules or rotary handles, v accessories (terminal shields, door escutcheons, etc.), v connection of auxiliary circuits.

mechanical operation

Check the mechanical operation of devices: v contact opening, v contact closing, v tripping using the "push to trip".

operation of the electronic trip units and the Vigi modules

Check the electronic trip units using the mini test kit or calibration test kit (see page 13).

46

Check the Vigi modules using the test button on the front plate. This test guarantees tripping in the event of an earth fault.

Merlin Gerin

following tripping

trip indication Tripping is indicated on the front:

by the toggle

by the motor mechanism E32883

E32882

E32881

by the rotary handle

O

discharged

OFF

ON (closed)

ON (closed) ON I

tripped

2

push to trip

tripped

OFF (open/ isolated)

push to trip

push to trip

O OFF

1 /auto

manu

O OFF push

I push

ON

OFF (open/ isolated)

identifying causes A circuit breaker must NEVER be reset before identifying and eliminating the cause of the trip.

toggle

rotary handle E32884

When the lever is in the "tripped" position, the device must first be reset by setting the lever to the O/OFF position before reclosing (ON position).

c depending on the cause of the trip and prior to restarting the installation, certain precautions must be taken, namely insulation and dielectric tests on the installation, in part or in whole. These checks and tests must be carried out by qualified personnel.

E32506

circuit breaker reset

Causes may be multiple: c depending on how the circuit breaker is fitted out, certain auxiliaries (SD, SDE, SDV, etc.) or LED indications on the trip unit are important means in identifying the cause of the trip (see table page ??),

ON "I" closing

ON tripped push to trip

OFF "O" reset

ON I

tripped push to trip

O OFF

closing

OFF reset

motor mechanism See page ?? for the applicable procedure.

Merlin Gerin

47

operational anomalies

The table below does not list all possibilities, but can nonetheless assist in troubleshooting and providing corrective action. problems

If however, the problem persists, consult the Merlin Gerin after-sales support department.

indication

probable cause

corrective action

SD SDE "alarm" on electronic trip units

c protection settings are incorrect.

check the rated current of the supply network and set the proper value. check the setting for overload protection.

SD

c supply voltage for the undervoltage release (MN) is too low or subject to major fluctuations.

check the value of the power supply voltage and correct it.

repeated tripping

(DC networks are subject to major voltage fluctuations when loads are turned on. Voltage drops may provoke tripping on the circuit breaker by the MN release. SD

c inadvertent powering of MX shunt release.

determine the causes of the powering.

SD SDE

c ambient temperature too high.

ventilate the room or the device.

SD SDE SDV

c Vigi module settings are incorrect. c insulation fault.

check the insulation of the protected circuit.

SD SDE

c supply network is faulty.

identify and eliminate the fault.

SD

c MX shunt release is supplied with power.

determne the causes of the supply of power.

c MN undervoltage relese is not supplied with power.

check for power across the terminals and that connections are correct.

OF

c circuit breaker is interlocked.

check the installation diagram and the interlocking system (electrical or mechanical) of the two circuit breakers.

OF

c closing order inoperative.

c check that the selector on the front is in the automatic position. c check the power supply for the motor mechanism module, the motor and the closing signals.

SDE SD

c the device tripped due on an electrical fault.

c identify and eliminate the fault. c manually charge the motor mechanism module spring.

circuit breaker does not close manual operation

motor mechanism

48

Merlin Gerin

practical advice

Due to their design and characteristics, Compact NS circuit breakers require no maintenance. It is nonetheless recommended to ensure that devices operate in the conditions specified in the catalogue, namely:

c electrical and mechanical conditions, c environmental conditions (see pages 44 and 45).

improved safety

The following options are available: c long or short terminal shields providing IP 40 protection, c a sealable plate to block access to settings (thermal-magnetic trip units), c flexible phase barriers to improve insulation between power connections, c toggle cover to ensure IP 43 protection.

The base (plug-in configuration) can be fitted with: c shutters to block access to power parts (IP 4x protection).

c a full range of electrical indication auxiliaries (OF, SD, SDE, SDV), c indication of voltage presence across device terminals, c current measurement module with an incorporated ammeter or remote indication of the measured value, c load-circuit identification means (see Telemecanique catalogue, catalogue number AB1), c alarm indications (standard on devices equipped with electronic trip units).

c indication options on trip unit STR53UE (see page 12), c Dialpact indication, measurement and control modules.

E32885

maintaining performance levels of circuit breakers

push to trip

E32886

improved comfort

push to trip

E32887

improved aesthetics

c a range of escutcheons providing different protection (IP) levels for fixed devices, plug-in and withdrawable configutations, motor mechanism modules and rotary handles.

push to trip

Merlin Gerin

49

notes

50

Merlin Gerin

Merlin Gerin

51

notes

52

Merlin Gerin

postal address 38050 Grenoble cedex 9 France tel: (33) 04 76 57 60 60

As standards, specifications and designs change from time to time, please ask for confirmation of the information given in this publication. this document has been printed on ecological paper. Publishing: Schneider Electric SA Design, production: AMEG SA Printing: Color Press Annecy

ART 073432

07-96

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