Compact 80 1250 (Circuit Breakers)

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2 Merlin Gerin

c protection of motor starters

With the Compact system, Merlin Gerin

is today Europe’s leading manufacturer ofmoulded-case circuit breakers

The Compact range covers all ratings from

c fixed, plug-in or withdrawable;

c a comprehensive range of trip units

Circuit breakers designed for all applications:

c 1000 V AC models;

c models for DC systems;

c source changeover systems

Compact NS circuit breaker

pushtrip

push pushtrip

c protection of incoming devices

of industrial control panel

pushto

M

c earth fault protection

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Merlin Gerin 3

rated current (A)

ultimate breaking capacity Icu (kA rms)

at 380/415 V (IEC 947-2)

ratings and breaking

capacities

The rating plates on the front face of the

circuit breakers indicate the breaking

Icu(kA)

220/240 380/415 440 500 525 660/690 250

85 36 30 22 8 50

cat A Ics = 100 % Icu

220/240 380/415 440 500 660/690 250

100 70 50 10 85

Icu(kA)

220/240 380/415 440 500 525 660/690 250

150 150 70 50 100

pushtrip pushtrip

units, Compact circuit breakers offer the bestguarantee of electrical power availabilitywhen faults occur In most cases,discrimination between protective devices

is ensured for all types of faults (overloads,low and high short-circuit currents)

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4 Merlin Gerin

possible to adapt the Compact system to amaximum number of configurations.Trip units, auxiliaries and installation andconnection accessories are the same for allmodels within each of following ranges:

c Compact NS80 and NSA125/160

c Compact NS100 to NS250,

c Compact NS400 to NS630,

c Compact C801 to C1251

The common modules for Compact NS100

to NS250 circuit breakers and disconnectors are shown opposite

switch-The same principle applies to CompactNS400 to NS630 and Compact C801 toC1251 circuit breakers

Fewer catalogue numbers means immediateavailability of parts for all solutions

3. Vigi earth-fault protection module

4. Insulation monitoring module

5. Voltage presence indicator

7. Voltage releases MN or MX

8. Multifunction auxiliary switch

9. Direct rotary handle

10. Extended rotary handle

11. Motor mechanism

12. Plug-in base

13. Connection of plug-in andwithdrawable configuration auxiliarycircuits

14. Connection accessories

15. Short terminal shields

16. Long terminal shields

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Merlin Gerin 5

to standardise switchboards, meaning fasterinstallation and fewer errors

All type L Compact circuit breakers (150 kA)are housed in the same frame as the type Nand type H models with the same ratings

Compact circuit breakers can be easilyinstalled side-by-side in a minimum amount

of space

4 sizes from 80 to 1250 A

Compact

Connection parts for Compact NS.

front and rear connections for bare cables,cable lugs or bars, as well as plug-in orwithdrawable versions, are available using

a full set of accessories that can be rapidlyadded to the circuit breaker

plug-in and withdrawable

versions

Withdrawable Compact NS250N on a chassis.

Plug-in and withdrawable versions for:

c fast removal or insertion of the circuitbreaker without exposure to live parts;

c standby outgoing circuits ready for wiringand circuit breaker installation at a laterdate;

c for visible break disconnection

prefabricated

trunking

Compact NS circuit breakers can beinstalled in junction boxes of theTelemecanique Canalis range ofprefabricated trunking (see correspondingcatalogue)

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It is therefore easy to change the protection

of a given circuit following a modification in

an installation

On Compact NS400 and NS630 circuitbreakers, the electronic trip units areinterchangeable plug-in modules

Trip unit STR53UE offers a large number ofprotection settings

Compact NS100 630

Thermal-magnetic trip unit TM.

Compact NS250H.

Compact C801 1251

Compact C1251H circuit breaker.

Electronic trip units allow perfect adaptation

of the protection to each circuit in theelectrical distribution network, and, at thesame time, simplify the selection, installationand operation of the devices:

c wider range of settings, so that a singletrip unit can provide several types ofprotection,

c easier checking during assembly or onsite,

c new functions offered by the trip unit, such

as load monitoring and local indications.Electronic trip unit STR35SE.

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Merlin Gerin 7

other functions

indication

and measurement

Compact NS250L with ammeter module.

Four indication and measurement functionsmay be mounted directly on Compact NScircuit breakers:

c voltage presence indicator for the circuitbreaker terminals, particularly useful onswitchboard incoming units,

c display of current readings,

c remote transmission of current readings,

c earth fault indication for earth faultdetection on TNS systems or assistance inlocating earth faults on TT systems

options for trip unit

c built-in ammeter;

c earth-fault protection;

c zone selective interlocking;

c transmission of all information concerningcircuit-breaker operation to a monitoring,control or automated distribution centre, viaDialpact modules (see below)

be equipped with Digipact communicationsmodules From a remote location (standardpersonal computer PC or programmablelogic controller PLC), the operator can:

c display the status of circuit breakers;

c control the circuit breakers;

c access information provided by theelectronic trip units

It is also possible to check the status of theUA150 automatic source-changeovercontrollers

For more information: see Digipactcatalogue

Modbus / JBus DC150 data concentrator

internal Digipact bus

PM150

power meter

CLS150indicationand localcontrolmodule

circuit breaker orother power-circuitactuator

UA150 automaticsource-changeovercontroller

Multi 9 controldevice andATB 1Sinterface

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Compact NS250N with motor mechanism.

A motor mechanism can be fitted to the frontface of Compact NS100 to C1251 circuitbreakers Remote control of the opening,closing and reset functions is then possiblevia 2 or 3 impulse or maintained signals

If necessary, the circuit breakers can still beoperated locally via the controls on the frontface

The motor mechanism modules for eachrange have a common size

The motor mechanism module forCompact NS is also available incommunicating version (see Digipactcatalogue)

Vigi earth-fault protection

module

Vigi modules can be added to Compact NScircuit breakers to provide earth-faultprotection The Vigi modules fit directly onthe circuit breaker terminals

The addition of a Vigi module has no effect

on the other performance characteristics ofthe circuit breaker

Compact NS250H with Vigi earth-fault protection module.

v Compact C: two models, the same for allCompact C801 to C1251 circuit breakers,provide remote indications of circuit breakerstatus and electrical faults (e.g 30F + 1SD),

c the MN or MX voltage releases arecommon for all models within each offollowing ranges:

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The interchangeable thermal-magnetic or electronic trip units of the Compact NS are designed

to protect the following types of electrical installations:

c Standard installation (supplied by a transformer);

c Installations supplied by a generator;

c DC installations;

c Long cable lengths for IT and TN;

c Motors and motor starters

+

push

to

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Vigirex earth fault relays separate toroids

circuit breakers all Compact NS equiped by a voltage release (MN or MX)

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manual source- by toggle

changeover by rotary handle

automatic source- changeover systems

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Merlin Gerin 13

current (A)

UD160

current (A)

NS160NANS250NA

refer to dedicated catalog

pushtotrip

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c IEC 68-2-30 damp heat;

c IEC 68-2-2 dry heat;

c IEC 68-2-11 salt spray;

c IEC 68-2-1 low temperatures

environmental protection

Compact circuit breakers takeinto account current concerns forenvironmental protection Most componentsare recyclable and parts are marked asspecified in applicable standards

ambient temperature

c Compact circuit breakers can be used attemperatures ranging from -25°C to 70°C.Above 40°C (or 65°C for circuit breakersused to protect motor feeders), always takeinto account the derating coefficientsindicated in the documentation;

c wherever possible the circuit breakersshould be put into service at their normalambient operating temperature, however thiscan be done at temperatures between -35°Cand -25°C as long as this condition does notlast for an extended period;

c in their original pack, Compact circuitbreakers may be stored at temperaturesranging from -50° to +85°C

comply with the following internationalrecommendations:

c IEC 947-1: general rules;

c IEC 947-2: circuit breakers;

c IEC 947-3: switches, disconnectors,switch-disconnectors, etc;

c IEC 947-4: contactors and motors starters

c IEC 947-5.1 and following - control circuitdevices and switching elements; automaticcontrol components

In that these recommendations are applied

in most countries, Compact circuit breakersand auxiliaries comply with European(EN 60947-1 and EN 60947-2) and thecorresponding national standards:

Compact circuit breakers are also designedfor the protection of machine tools in thatthey comply with French standard

NF C 79-130 and with the recommendationsissued by the CNOMO organisation

Concerning the United States UL, CanadianCSA, Mexican NOM and Japanese JISstandards, please consult us

pollution degree

Compact circuit breakers are certified foroperation in pollution-degree IIIenvironments as defined by IECstandard 947 (industrial environments)

Standardised characteristics indicated

on the rating plate

Ui: rated insulation voltage

Uimp: rated impulse withstand voltage

Icu: ultimate breaking capacity, for various

values of the rated operational voltage Ue

cat: utilisation category

Icw: short-time withstand current

Ics: service breaking capacity

In: rated current

: suitable for isolation

discrimination

In most cases, discrimination is total

between two Compact NS circuit breakers

equipped with standard trip units

(or between Compact NS and Multi 9 circuit

breakers)

The table opposite indicates the

combinations providing total discrimination

for N-type circuit breakers equipped with

standard trip units

downstream circuit breaker rating (A)

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Merlin Gerin 15

All Compact circuit breakers aresuitable for isolation as defined in IECstandard 947-2:

c the isolation position corresponds to the O(OFF position);

c the operating handle cannot indicatethe "off" position unless the contacts areeffectively open;

c padlocks may not be installed unless thecontacts are open

Installation of a rotary handle or a motormechanism does not alter the reliabilitythe position indication system

The isolation function is certified by testsguaranteeing:

c the mechanical reliability of the positionindication system;

c the absence of leakage currents;

c overvoltage withstand capacity betweenupstream and downstream connections

suitability for isolation

positive contact indication

degree of protection

(as per standards IEC 529)

installation in class II switchboards

All Compact circuit breakers, even whenfitted with a rotary handle or a motormechanism, may be installed throughthe door of class II switchboards (as per IECstandard 664)

Installation requires no special operationsbecause the Compact provides class IIinsulation between the front face and allinternal circuits

bare circuit breaker with terminal shields

with direct rotary handle standard / VDE IP40

circuit breaker installed in switchboard

with direct rotary handle standard / VDE IP40

with motor mechanism IP40

I

push ON

O

push OFF 1 manu/auto

push

push ON I O OFF

push ON

O OFF ON

OFF push

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(*) 2P only for N-types

(**) for operational voltage up to 500 V

Compact circuit breakers

number of poles

electrical characteristics as per IEC 947-2 and EN 60947-2

rated insulation voltage (V) Ui rated impulse withstand voltage (kV) Uimp rated operational voltage (V) Ue AC 50/60 Hz

500 V (2 P in series)

utilisation category suitability for isolation

electrical 440 V - In/2

440 V - In

electrical characteristics as per standard Nema AB1

480 V

600 V

Vigirex relay

installation and connection

fixed/front connection fixed/rear connection plug-in (on base) withdrawable (on chassis)

indication and measurement auxiliaries

auxiliary switches electronic trip unit related functions voltage presence indicator

current transformer module ammeter module

insulation monitoring module

control auxiliaries

auxiliary releases motor mechanism rotary handles (direct, extended) manual/automatic source changeover systems

installation and connection accessories

bare cable connectors terminal extensions and spreaders terminal shields and phase barriers escutcheons

dimensions and weights

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Merlin Gerin

18

protection of low-voltage distribution networks (cont.)

circuit breakers for power

rated impulse withstand voltage (kV) Uimp

DC 250 V (1 pole)

500 V (2 poles)

electrical 440 V (277 V for 1P) - In/2

440 V (277 V for 1P) - In/2

electrical characteristics as per Nema AB1

277 V

480 V

600 V

Vigirex relay

installation and connections

auxiliary switches voltage presence indicator voltage transformer module ammeter module

bare-cable connectors terminal extensions and spreaders terminal shields and phase barriers front panel escutcheons

dimensions: W x H x D (mm) weight (kg)

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The Compact range also includes a circuit

breaker for 1000 V AC distribution networks

(see page 0023)

Compact circuit breakers

number of poles

electrical characteristics as per CEI 947-2 and EN 60947-2

rated insulation voltage (V) Ui rated impulse withstand voltage (kV) Uimp rated operational voltage (V) Ue AC 50/60 Hz

250 V

500 V

750 V

short-time withstand current Icw kA rms

t (s)

440 V - In

electrical characteristics as per standard Nema AB1

480 V

600 V

Vigirex relay

auxiliary switches electronic trip unit related functions voltage presence indicator

bare cable connectors terminal extensions and spreaders terminal shields and phase barriers escutcheons

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30 Merlin Gerin

protection of low-voltage distribution networks

trip units for Compact C801 to C1251

A A

.8 1

.85

4 6

1.5 10

xIr

.3

0 0 1

.3

.2

8 2 3

.2 1

1 "long time" protection threshold

2 "long time" protection time delay

3 "short time" protection threshold

4 "short time" protection time delay

5 "instantaneous" protection threshold

6 option (see page 34)

.8 1

xIo

.85

4 6

1.5 10

xIr

8 2 3 5

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Merlin Gerin 31

electronic trip unit STR45AE

electronic trip unit STR45BE

electronic trip unit STR55UE

c"long time" protection against overloads;

c"short time" protection against

short-circuits of low intensity;

c"instantaneous" protection against

short-circuits of high intensity;

cresidual earth fault protection as an option

(see page 34)

Trip units do not have a predefined rating

The "long time" protection threshold

depends only on the circuit breaker current

rating and on the "long time" protection

setting (see page 32)

Indication and measurement options (6) (see page 34).

.8 1

xIo

.85

15 480 30

240 60

at 1.5Ir

4 6

1.5 10

xIr

.3

0 0 1

.3

.2

8 2 3

.9 95

B A

240 60

at 1.5Ir

4 6

1.5 10

xIr

.3

0 0 1

.3

.2

8 2 3

.2 1

.4

.5 3

.3 2

.8 1

xIo

.85

15 480 30

240 60

at 1.5Ir

4 6

1.5 10

xIr

.3

0 0 1

.3

.2

8 2 3

.2 1

Ic1

.4

.1 3

xIn

A 20

C 801N•H Ic1

C 1001N•H 18

C 1251N•H

A

I

.2 1 3 4

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32 Merlin Gerin

trip units for Compact C801 to C1251 (cont.)

(*) For Compact C801L and C1001L, current settings must not exceed eight times the circuit breaker rating (C801L: 6300 A, C1001L: 8000 A)

overload protection (long time)

"fine setting" version: 32 settings)

short-circuit protection (short time)

earth fault protection option (T)

fault indications option (F)

load monitoring option (R)

communication option (COM)

zone selective interlocking (Z)

Constant I 2 t positions

Inverse-time tripping (ST short-timeprotection) to improve discrimination(particularly with downstream fuses)

Neutral protection

In the event 4P 4d or 4P 3d + Nr devicesand the corresponding trip units are suppliedseparately, a current sensor must beinstalled on the fourth pole inside the circuitbreaker

Tripping thresholds are indicated for 2 or

Conductor cooling time following tripping

taken into account by LT protection

Test

Test connector to check circuit breakeroperation using a mini test kit or a calibrationtest kit (see page 73)

Indication and measurement options (see page 34).

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34 Merlin Gerin

trip units for Compact C801 to C1251 (cont.)

I

t

0

Ih th

xIr

Two adjustable threshold (only one, Ic1, ifoption R is combined with option T), thatdepends on the LT setting, control the opto-decoupled outputs (transistors) or send asignal via the communication outputs Thesetwo thresholds (Ic1 and Ic2) are used forapplications such as load shedding andreconnection, interlocking systems andalarms

I

t

0

Fault indications (F) In addition to indications for standard faults

(toggle, SD and SDE auxiliary switches), thisoption differentiates between the threepossible causes of tripping via three LEDs:

on STR45BE trip units It requires anexternal power supply

1.5 10

xIr

8 2

6 Ih

.2 .

.4 3

B A

Communication (COM)

The following information is transmitted to

Digipact distribution monitoring and control

modules: all data concerning the currents

passing through the CTs, all trip-unit

settings, including those of options T and

R,load-shedding orders, fault indications

provided by option F and an alarm indication

when the internal temperature is 10°C below

the circuit breaker self-protection threshold

Possible combinations

c option Z;

c options Z, R and F;

c options Z, T, R and F;

c options Z, F and COM;

c options Z, R, F and COM;

c options Z, T, F and COM;

c options Z, T, R, F and COM

Zone selective interlocking (Z)

A number of circuit breakers areinterconnected one after another by a pilot-wire In the event of a short-time or earthfault, the control unit applies the set timedelay only if it receives a signal from adownstream circuit breaker If not, it tripsinstantaneously (tripping time as 0.1 short-time setting) In this way, the fault is clearedrapidly by the nearest circuit breaker Thethermal stresses in the installation areminimised while maintaining timediscrimination throughout the entireinstallation

Opto-electronic outputs

The use of opto-transistors ensures totalisolation between the internal circuits of thecontrol unit and the circuits wired by theuser

options for electronic trip units STR45/55

Earth fault protection (T)

The earth fault protection is of the residualcurrent type The circuit breaker trips, after

an adjustable time delay th, at an adjustablethreshold In that depends on the ratedcurrent In

On request, the earth fault protection may be

of the "W" type (source ground return) or ofthe neutral protection type

The thermal memory is identical to that ofthe LT protection, with a time constant of

20 seconds

For distributed neutral systems, option T requires installation of the 4th pole sensor downstream the circuit breaker.

.4

.5 3

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Merlin Gerin 35

1600 3200 3200 6400

(2) Minimum operating current 0.22 x In.

Ir: tripping threshold of overload protection

earth fault protection (T)

settings 0.2 - 0.25 - 0.3 - 0.35 - 0.4 - 0.45 - 0.5 - 0.6

max overcurrent time before tripping 60 140 230 350

signal via the communication output when the trip unit isequipped with the COM option

type of data transmitted I1, I2, I3 Ineutral, Imax, all trip-unit settings, rating plug

identification (UL and JIS versions), load monitoring, faultindications, causes of malfunction, internal temperature

Magnetic trip units for Compact C1251N,

3 poles version, designed particularly for the

protection of DC networks These trip

units are not interchangeable: the circuit

breaker is supplied fully assembled

All electrical characteristics and circuit

breaker enhancements (auxiliaries and

accessories) are indicated on page 20

magnetic trip units P21/P41

P21 3P

4800 6000

9600 7800

t(s)

I(A)

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ultimate breaking capacity (kA rms) Icu AC - 1000 V 10 10 10

earth fault protection

voltage presence indicator current transformer module ammeter module

dimensions L x H x D (mm) (1) 3 poles, fixed, FC 140 x 480 x 110

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(2): Defined for a power factor cos ϕ = 0.3.

ultimate breaking capacity (kA rms) (2) Icu AC - 1000 V 20 20 20

protection against overcurrents interchangeable

electronic trip unit c c c

STR35GE/SE/ME(3) c c c

plug-in (on base)

voltage presence indicator current transformer module ammeter module

dimensions L x H x D (mm) 3 poles, fixed, FC 210 x 374 x 172

(3)

instantaneous CT400/800 CT1250

fixed: STR35 15 x In 12 x Inadjustable: STR55

2 to: 15 x In 12 x In

C1251N 1000 V

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38 Merlin Gerin

earth fault protection

Vigi earth fault modules

Vigicompact NS250N

Compliance with standards

c IEC 947-2, appendix B;

c IEC 255-4 and IEC 801-2 to 5, covering

protection against nuisance tripping due to

transient overvoltages, lightning strikes,

switching of devices on the network,

electrostatic discharges, radiofrequency

0,03 ( ∆ t = 0 )

vigi MH

3 1 0,3

∆ t(ms)

I ∆ n(A) 10

to function even when supplied by only twophases

Remote indications

Vigi modules may be equipped with an SDVauxiliary switch (see page 64) to remotelyindicate tripping due to an earth fault

1 sensitivity setting

2 time-delay setting (for discrimination with earth fault protection)

3 lead seal preventing access to settings

4 test button for routine tripping checks by internally simulating an earth fault

5 reset button (resetting is required following a trip due to an earth fault)

by fitting a "Vigi" earth fault module directly

on the circuit breaker terminals

The addition of the Vigi module does notaffect circuit breaker characteristics (seepages 10 to 13);

c conformity with standards;

c protection degrees, class II insulation frontface;

c suitability for isolation as defined byIEC 947-2;

celectrical characteristics;

c trip unit characteristics;

c installation and connection methods;

c indication,measurement and controlauxiliaries;

c installation and connection accessories

earth fault protection characteristics

(*) Vigi 3P modules may also be used on 2P circuit breakers

(**) If the sensitivity is set to 30 mA, the tripping is not delayed

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Merlin Gerin 39

push to trip

M

combination of

Compact circuit breaker

Vigirex earth fault

Vigirex relay characteristics

Residual current operated relay withseparated toroid:

c sensivity adjustable from 30 mA

to 250 A;

c eight time-delay settings (0 to 1s);

c closed toroids (30 to 300 mm diameter);

c split toroids (46 to 110 mm diameter);

c options :

v trip alarm by a failsafe contact,

v pre-alarm contact and indicating light(threshold: 0.5 x I∆n),

c IEC 755, class A, immunity to DCcomponents up to 6 mA;

c VDE 664, operation down to - 25°C

For complete information on the Vigirex range, consult the corresponding

Merlin Gerin documentation

➂

➀

➁

➀ residual current measurement toroid

➁ Vigirex earth fault detection relay

➂ MN or MX auxiliary release for earth fault tripping.

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Merlin Gerin

40

motor protection

pushto

The circuit breakers presented here:

c provide protection against short-circuits;

c are suitable for isolation as defined by

IEC 947-2 standard

For a complete protection of the motor and

its control device, overload protection may

be ensured by either:

c the circuit breaker;

c a separate Telemecanique thermal relay.

The control device may be of the direct

on-line type (with or without reversing) or of the

"star-delta" type

Combinations are governed by IEC 947-4

standard

protection coordination

(as defined by IEC 947-4)

Whatever the power of the motor, the

coordination between circuit breaker,

contactor and relay can be of either type 1 or

2 (see the complementary technical

information chapter page 195) Selection

depends on operational requirements

concerning continuity of service and the

technical skills of servicing personnel

All type 2 Merlin Gerin/Telemecanique

combinations have been tested under the

conditions defined by standards, and they

are certified ASEFA/LOVAG

E26988 Compact circuit breakers

number of poles

rated insulation voltage (V) Ui rated impulse withstand voltage (kV) Uimp

440 V

500 V

525 V660/690 V

500 V (2 poles)

440 V - In

480 V

600 V

protection

overload and short-circuit protection rating (A)

interchangeable trip units

short-circuit protection (separate thermal relay) rating (A)

Vigirex relay

auxiliary switches electronic trip unit function voltage presence indicator current transformer module ammeter module

auxiliary releases motor mechanism rotary handles (direct, extended) locking systems

dimensions: L x H x D (mm) weight (kg)

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Merlin Gerin

42

motor protection (cont.)

pushto

The circuit breakers presented here:

c provide protection against short-circuits;

c are suitable for isolation as defined by

IEC 947-2 standard

For a complete protection of the motor and

its control device, overload protection may

be ensured by either:

c the circuit breaker;

c a separate Telemecanique thermal relay.

The control device may be of the direct

on-line type (with or without reversing) or of the

"star-delta" type

Combinations are governed by IEC 947-4

standard

protection coordination

(as defined by IEC 947-4)

Whatever the power of the motor, the

coordination between circuit breaker,

contactor and relay can be of either type 1 or

2 (see the complementary technical

information chapter page 195) Selection

depends on operational requirements

concerning continuity of service and the

technical skills of servicing personnel

All type 2 Merlin Gerin/Telemecanique

combinations have been tested under the

conditions defined by standards, and they

are certified ASEFA/LOVAG

E26988 Compact circuit breakers

number of poles

rated insulation voltage (V) Ui rated impulse withstand voltage (kV) Uimp

ultimate breaking capacity Icu AC 50/60 Hz 220/240 V

440 V

500 V

525 V660/690 V

440 V - In

480 V

600 V

protection

overload and short-circuit protection rating (A)

short-circuit protection (separate thermal relay) rating (A)

Vigirex relay

auxiliary switches electronic trip unit related function voltage presence indicator voltage transformer module ammeter module

auxiliary releases motor mechanism rotary handles (direct, extended) locking systems

dimensions: L x H x D (mm) weight (kg)

(*) Ics = 100% Icu for Ue < 500 V (**) Rated current In at 65 ° C for withdrawable Compact C1251N/H: 960 A

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trip units selection (cont.)

For motor protection, Compact circuitbreakers may be fitted with:

c magnetic trip units, wich provide circuit protection;

short-c electronic trip units, specifically designed

to provide:

v short-circuit protection,

v overload protection,

v phase-failure protection

overload (long time)

tripping Ir adjustable (10 settings) adjustable (40 settings) adjust (32 settings) adjustable (32 settings)

phase-failure (complied with the standard IEC 947-4-1)

tripping time for phase between 3.5 and 6 s 4 s ± 10%

failures (s)

short-circuit (short time)

tripping Im or Isd fixed adjustable (8 settings) adjust (8 settings) adjustable (8 settings)

MA STR43ME

STR35ME (LR OFF) STR55UE

0.37 1.5

18.5 40 3

500 800

560 1000 670 1250 1.1

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4 5

electronic trip unit STR22ME

for Compact NS100 to NS250 circuit breakers

adjustable Ir threshold (1), in compliance

with tripping class 10 as defined by

IEC 947-4 (2);

c single-phasing protection (trips in 3.5 and

6 s);

c ST (short-time) short-circuit protection:

v fixed tripping threshold (13 x Ir) (3),

v fixed time delay (4);

c INST (instantaneous) short-circuit

protection, with fixed threshold (15 x In) (5).

Load indication by LED in front (7):

c off when: I < 1.05 x Ir;

c flashing when: I u 1.05 x Ir

Test

Test connector in front (8) for connection to

a mini test kit or calibration test kit to checkcircuit breaker operation after fitting the tripunit or other accessories

Contactor tripping module SDTAM (early

thermal fault signal, optional):

c opens the contactor in the event of anoverload It is thus possible to differentiatebetween tripping due to overloads and short-circuits;

c may also be used to signal a thermal fault;

c must be reset manually (locally orremotely);

c compatible with the following controlvoltages:

trip unit STR22ME

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4 5

STR 43 ME Io

.90 93

.95 98 1

.88

.85

.8

9 10 11 12 13

8 7 6

motor protection (cont.)

electronic trip unit STR43ME for Compact NS400

to NS630 circuit breakers

adjustable threshold, based on the actualrms current:

v adjustable threshold (1)using five Io basesettings (0.5 to 0.8), and fine adjustment Irwith eight settings ranging from 0.8 to 1,

v adjustable tripping time (2), in compliance

with tripping classes 10 A, 10 and 20 asdefined by IEC 947-4;

c the STR43ME offers two motor coolingtime constants, associated with the motorstarting class:

v short cooling time constant (the same asthe heating time constant), providingmaximum continuity of service andsatisfactory motor protection,

v long cooling time constant (four times theheating time constant), providing maximummotor protection,

c single phasing protection The single phasing complies with the recommendations

-of standard IEC 947-4-1 It becomesoperational whenever a phase currentimbalance of 40% or more is present;

c ST (short time) short-circuit protection:

v adjustable threshold Isd (3),

v fixed time delay (4);

c INST (instantaneous) short-circuit

protection, with fixed threshold (5).

LED flashes when the current exceeds thelong-time threshold Ir

c single-phasing (LED on the right);

c microprocessor malfunction (all three (>Ir),

(>Isd) and single-phasing LEDs go on);

Battery powered Spare batteries aresupplied in an adapter box When a faultoccurs, the LED indicating the type of faultgoes off after about 10 minutes to conservebattery power.The information is howeverstored in memory and the LED can be re-illuminated by pressing the battery/LED test

pushbutton (6) The LED automatically goes

off and the memory is cleared when thecircuit breaker is reset

Test

c test connector in front (8), for connection

to a mini test kit or calibration test kit (seepage 73) to check circuit breaker operationafter fitting the trip unit or other accessories

c test button (6) for (%Ir), (>Ir), (>Isd) and

(single-phasing) LEDs and battery

Self-monitoring

The circuit breaker trips for:

c microprocessor faults;

c abnormal temperatures

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Merlin Gerin

A

options for trip unit STR43ME

current of the phase with the greatest load

By pressing a scroll button, it is alsopossible to display successively thereadings of I1, I2, I3 an the long timethreshold setting Ir

LEDs indicate the phase or setting for whichthe current is displayed

Ammeter display limits:

c minimum current u 0,2 x In (lower currentsare not displayed) ;

c maximum current i 10 x In

c may also be used to signal a thermal fault;

c must be reset manually (locally orremotely;

c compatible with the following controlvoltages:

v 24 to 72 V DC and 24 to 48 V AC,

v 110 to 240 V AC / DC;

c fits in place of the MN and MX auxiliaryvoltage releases

monitoring and control modules

Transmitted data:

c settings;

c phase currents (rms values);

c highest current of the three phases;

c overload condition alarm;

c cause of tripping (overload, short-circuit,etc.)

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Merlin Gerin

48

electronic trip units for Compact C801 C1251

electronic trip unit STR35ME

electronic trip unit STR55UE

other functions (STR35ME and STR55UE)

Overload indication

A LED in front (7) indicates the load level(current flowing through the circuit breakerwith respect to the Ir setting):

c lit when load u 90% Ir;

c flashing when load > 105% Ir

Test

Test connector in front (8) for connection to

a mini test kit or calibration test kit (seepage 73)

protection (STR55UE)

The trip units do not have a specific rating:

c LT (long time) overload protection:

v adjustable threshold Ir (1),

v adjustable time delay (2), in compliancewith tripping classes 5, 10, 20 and 30 asdefined by IEC 947-4-1;

c ST (short time) protection against intensity short-circuits:

medium-v adjustable threshold Im (3),

v adjustable time delay (4);

c INST (instantaneous) protection againsthigh-intensity short-circuits, with adjustablethreshold I (5)

protection (STR35ME)

The trip units do not have a specific rating:

c LT (long time) overload protection:

v adjustable threshold Ir (1), with an OFF

position to disable the LT protection,

v fixed time delay, in compliance with

tripping class 10 as defined by IEC 947-4-1;

c ST (short time) protection against

medium-intensity short-circuits:

v adjustable threshold Im (3),

v adjustable time delay (4);

c INST (instantaneous) protection against

high-intensity short-circuits, with fixed

.8 1

xIo

.85

15 480 30

240 60

at 1.5Ir

4 6

1.5 10

xIr

.3

0 0 1

.3

.2

8 2 3

.2 1

Ic1

.4

.1 3

.9 95

B A

A A

.8 1

.85

4 6

1.5 10

xIr

.3

0 0 1

.3

.2

8 2 3

Trang 40

c suitability for isolation.

Connections

Front connection to integrated connectorsfor bare cables with cross-sections from1.5 to 70 mm2

characteristics of short-circuit protection devices

with separate overload protection

Compact NS100 NS630 with trip unit MA

For the protection of motors from 1.1 to

250 kW (400 V), Compact NS100 to NS630circuit breakers must be equipped with aspecial trip unit MA with adjustablethresholds

This assembly ensures:

cshort-circuit protection (magnetic trip unitwith adjustable thresholds);

csuitability for isolation

For the Compact NS400 to NS630 circuitbreakers, trip unit MA is not interchangeable

The circuit breaker and trip unit are suppliedalready assembled

short-circuit protection (magnetic)

6 14 x In

Compact C801 C1251

For the protection of motors from 160 to

670 kW with Compact C801 to C1251 circuitbreakers, equipped with an STR35ME or anSTR55UE trip unit, it is possible to disablethe LT protection

The circuit breakers ensure:

cshort-circuit protection (short time orinstantaneous);

csuitability for isolation

Electrical characteristics

c Compact NS80/630, see page 40;

cCompact C801/1251, see page 42

csmall size for easy installation in motorcontrol centre (MCC) switchboards

short-circuit protection (magnetic)

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Dung lượng	8,93 MB