magnetic circuit breaker

8/11/2019 Magnetic Circuit Breaker

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Medium Voltage Products

eVM1Medium voltage vacuum circuit-breakerswith integrated magnetic actuator,sensors, protections and control12...17.5 kV - 630...1250 A - 16...31.5 kA


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DESCRIPTION

CIRCUIT-BREAKER SELECTION AND ORDERING

SPECIFIC PRODUCT CHARACTERISTICS

OVERALL DIMENSIONS

ELECTRIC CIRCUIT DIAGRAM


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General 4

Magnetic drive technology 6

Structure 8

Magnetic drive 8

Local control and signalling interface 8

Electronic module 8

Position sensors 9Capacitors 9

Vacuum current quenching 10

Quenching principle of ABB interrupters 11

Versions available 13

Fields of application 13

Standards and approvals 13

Service safety 13

Technical documentation 14

Quality System 14

Test Laboratory 14

Environmental Management System 14

Health and Safety Management System 14

DESCRIPTION


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DESCRIPTION

The eVM1 circuit-breakers use vacuum interruptersembedded in resin poles. The interruptersembedded in the resin make the circuit-breakerpoles particularly sturdy and are effectivelyprotected from shocks, deposits of dust andhumidity. Each interrupter houses the contacts andmakes up the quenching chamber. Activation of theinterrupter contacts is entrusted to a singlemagnetic drive controlled by position sensors andby an electronic module. The energy needed for theoperation is provided by capacitors which ensurean adequate reserve of energy. Thanks to thesedetails, eVM1 circuit-breakers guaranteesturdiness, reliability, long life and aremaintenance-free.

GeneralThe eVM1 circuit-breaker is a complete protectionsystem of medium voltage electrical installationsand, apart from the medium voltage vacuum circuit-breaker with magnetic drive, it consists of thefollowing electronic devices for:

protection control measurement monitoring watchdog.

The current sensors mounted at the rear of thecircuit-breaker poles are also part of the system,thereby carrying out, in medium voltage, theconcept of an automatic low voltage circuit-breakerin the standard solution, also widely used inmedium voltage secondary distribution.


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The eVM1 circuit-breakers are provided withcurrent sensors on the pole terminals and thesecondary circuit is cabled directly to the electroniccontrol and protection module on board the circuit-breaker. A single type of sensor covers the wholerange of rated currents.The electronic module controls all the functions ofthe circuit-breaker: operation of the drive, protec-tions, state of the whole switchgear panel and itsintegrity. Since most of the panel functions are onboard the circuit-breaker, the use of eVM1 circuit-breakers allows cabling to be drastically reduced.

The configuration software allows display and/ormodification of the protection, control and generalsetting parameters and makes complete supervi-sion of the state of the panel possible.

The electronic control card at all times checksefficiency of the magnetic drive coils, correctcharging of the capacitor for the opening closing

opening cycle, incorrect positions or incongruentstates of the circuit-breaker and of the panelisolators and efficiency of the microprocessor,making up an advanced watchdog system for thecircuit-breaker, whose state is communicated to theoperator either by means of signalling on the localHMI (human machine interface) or by means of thebinary outputs, in order to allow intervention andto be able to solve the problem without discover-ing it at the last moment when the circuit-breakerhas to operate.

Compared with a traditional medium voltage circuit-breaker, the integrated eVM1 circuit-breaker offersconsiderable advantages both in the installationstage and during service:

simplified preparation of the specifications andof ordering procedures, leading to more rapid

delivery times

full factory testing and commissioning of opera-tion of the circuit-breaker and of the othercomponents mounted in the paneldrastic reduction in cabling and in the risk oferrorsmore rapid installation and putting into service ofthe substationimproved service safety and reliabilityall the documentation regarding the system isavailable right from the beginning of the project.

The control circuit is characterised by:high electromagnetic immunityself-diagnosis of the charge of the capacitors andof continuity of the coils, controller watchdogwith fault signallingwide range of auxiliary power supply in direct andalternating currentlow consumption for maintaining the charge ofthe capacitorsdetection of the circuit-breaker state by means ofproximity sensorsmonitoring of all the quenching functionsprotection functions in accordance with IEC60255-3 and IEC 60255-8 Standards:

basic series- 51 Overcurrent IDMT (NI, VI, EI, LI)- 51 Overcurrent DT1- 50 Overcurrent DT2- 51N Earth faultIDMT- 51N Earth fault DT1- 50N Earth fault DT2

complete series (also includes)- 51MS Motor starting protection- 66 Number of start-ups- 51LR Locked rotor- 49 Thermal overload

- 46 Unbalanced load.

(1) For availability, pleasecontact us.


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Magnetic latching in end-of-run position. Magnetic latching and magnetic fieldaction of a coil.

Moving armature in opposing positionand end-of-run magnetic latching.

Capacitors are provided in the control circuit whichallow the circuit-breaker to be operated, with a timelimit of two minutes, even when there is a drop inthe auxiliary voltage. In case of emergency, thecircuit-breaker can in any case be opened bymeans of a special lever acting directly on themoving armature of the drive.Compared with a traditional drive, the magneticdrive has few moving parts and drastically reducedwear even after a high number of closing andopening cycles.These characteristics make it practically mainte-nance-free.

DESCRIPTION

Magnetic drive technologyThe magnetic drive used in the eVM1 circuit-breakers generates the stroke required to activatethe moving contact in the interrupters and inte-grates all the functions of a traditional drive.The magnetic drive is a bistable system where theend-of-run positions of the moving armature arereached by means of magnetic fields generated bytwo coils (one for closing and one for opening).The moving armature is kept in position by perma-nent magnets.

The circuit-breaker operations are obtained byenergising the opening or closing coil respectively.The magnetic field generated by each coil attractsthe moving armature and thereby moves it fromone of the permanent magnet latching points to theother.


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1 Top terminal2 Bottom terminal3 Pole in resin4 Vacuum interrupter5 Current sensor

6 Flexible connection7 Contact pressure spring8 Insulating push-rod9 Drive shaft

10 Run regulator11 Position sensors12 Closing coil13 Permanent magnets14 Moving armature

15 Opening coil16 Manual emergency opening device17 Supporting structure


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DESCRIPTION

Magnetic driveThis consists of a laminar pack, twopermanent magnets, two coils and amoving armature.The moving element is attracted bythe magnetic field generated by oneof the windings and, by means of aspecial kinematics device, allows theinterrupter contacts to be operated onopening and closing.

Electronic moduleThe electronic module controls all thecircuit-breaker functions, receives andsends command and control signalsby means of binary inputs (logical)and isolated signalling contacts.It also carries out the protectionfunctions which are available in twoversions (basic and complete).

StructureThe magnetic actuator and the poles with the current sensorsare fixed to a metal frame that provides strength and reliabilityfrom a mechanical aspect.Both fixed and removable versions are available.The fixed version includes a cord and plug for connecting to theauxiliary circuits and current sensors.Besides the isolating contacts and the cord with plug forconnecting to the auxiliary circuits, the removable version alsohas a withdrawable trolley that allows it to be moved in and outof the panel or holder with the doors closed, and currentsensors.The precision class of the current sensors (Rogowski coils) is 1.

Local control and signallinginterfaceThe local on-board circuit-breakerunit allows local opening and closingoperations (if enabled) to be carriedout and to display the state of thecircuit-breaker by means of smallluminous mimic diagram. Special

LEDs display any anomalies, lockingof opening and closing operations,activation and trip of the protection,and the type of operation set (local/ remote).


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Position sensorsThe sensors have thefunction of determiningthe exact mechanicalposition of the circuit-breaker (open orclosed).The signal is sent to theelectronic controlmodule.

Vacuum quenching techniqueEmbedded vacuum interruptersContacts protected against oxidation and contaminationOperation under different climatic conditionsMechanical compatibility with the VD4 and VM1 seriesPossibility of use in all types of plantsMagnetic driveLimited number of componentsInductive position sensorsLimited power consumption

Sealed-for-life polesHigh reliability and sturdinessLong electrical and mechanical lifeMaintenance-freeCircuit-breaker racking-out and racking-in with door closedIncorrect and hazardous operations prevented by special locks in the drive andin the truck and by the electronic control moduleHigh electromagnetic and environmental compatibilityEmergency mechanical opening operationControl of the state of the circuit-breakerControl of continuity of the coilsControl of capacitor chargeWatchdog function

Protection functionsCurrent sensors (Rogowski coils)Programmable digital inputs/outputsConfiguration and supervision programme for PCPanel interface module (HMI) with ammeter (on request)Drastic reduction in cabling and in the risk of connection errorsMore rapid installation and putting into service of the substationRapid modification on site of the control and protection functions with the circuit-breaker already installed or in serviceImproved safety and reliability of serviceAvailability of all the documentation regarding the system right from the beginningof the project

1 Pole: vacuum interrupterembedded in epoxy resin

2 Capacitor

3 Current sensor(Rogowski coil)

4 Truck of the withdraw-able circuit-breaker

5 Operation counter6 Mechanical signalling for

Open/Closed7 Control panel

8 Magnetic drive9 Coupling of lever for

emergency manualoperation

10 Protection and controlunit

11 Binary inputs/outputs12 Socket for circuits

CapacitorsThe capacitors have thefunction of storing theenergy required for acomplete cycle: opening- closing - opening.When there is noauxiliary power supply,the capacitors are ableto maintain circuitefficiency for about 30 s.


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DESCRIPTION

Vacuum current quenchingThe eVM1 circuit-breaker exploits the dielectriccharacteristics of a vacuum and does not requirean interrupting and insulating medium. In fact, theinterrupter does not contain any ionisable gas.In any case, on separation of the contacts anelectric arc is generated made up exclusively ofmelted and vaporised contact material.The electric arc only remains supported by theexternal energy until the current is cancelled bynear natural zero.

At that instant, the rapid reduction in the loaddensity carried and rapid condensation of themetallic vapour, leads to extremely rapid recoveryof the dielectric properties.

The vacuum interrupter therefore recovers itsinsulating capacity and the capacity to withstandthe transient recovery voltage, definitively extin-guishing the arc.Since high dielectric strength can be reached in thevacuum, even with minimum distances, interruptionof the circuit is also guaranteed when separation ofthe contacts takes place a few milliseconds beforepassage of the current through natural zero.The special geometry of the contacts and thematerial used, together with the limited durationand low voltage of the arc guarantee minimumcontact wear and long life. Furthermore, thevacuum prevents their oxidation and contamination.

Characteristics of the vacuum interrupterembedded in the resin pole

Vacuum quenching techniqueContacts protected against oxidation andcontamination

Vacuum interrupter embedded in resinpoles

Interrupter protected against shocks, dustand humidity

Operation under different climaticconditions

Limited operating energy

Compact dimensionsSealed-for-life poles

Sturdiness and reliability

Maintenance-free

High environmental compatibility 1 Top terminal2 Vacuum interrupter3 Resin housing4 Stem of the moving

contact5 Bottom terminal6 Flexible connection

7 Tie-rod spring fork8 Tie-rod9 Pole fixing

10 Connection to thedrive


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Schematic diagram of the transition from a diffuse arc to a con-tracted arc in a vacuum interrupter.

Geometry of the contact with radialmagnetic field with an arc rotating in avacuum.

Diffuse arc. Contraction onthe anode.

Contraction onthe anode and

on the cathode.

Development of current and voltage trends in a single phase duringvacuum quenching.

C u r r e n

t , V o

l t a g e

Short-circuit current

Systemvoltage

Arc voltage

Short-circuit currentinterruption

Recoveryvoltage(systemfrequency)

Transient recovery (TRV)(high frequency)

Contactseparation

Time

Quenching principle of ABB interruptersIn a vacuum interrupter, the electric arc starts themoment the contacts separate, is maintained untilzero current and can be affected by the magneticfield.

Diffuse or contracted vacuum arcFollowing contact separation, single melting pointsform on the surface of the cathode. This causesformation of metallic vapours which support the arc

itself.A diffuse vacuum arc is characterised by expansionover the contact surface and by an even distributionof thermal stress.

At the rated current of the vacuum interrupter, theelectric arc is always of the diffuse type.Contact erosion is very limited, and the number ofcurrent interruptions very high.As the interrupted current value increases (abovethe rated value), the electric arc tends to betransformed from the diffuse into the contractedtype, due to the Hall effect.Starting from the anode, the arc contracts and asthe current rises it tends to concentrate.Near the area involved there is an increase intemperature with consequent thermal stress on thecontact.To prevent overheating and erosion of the contacts,the arc is kept rotating. When the arc rotates itbecomes similar to a moving conductor which thecurrent passes through.


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DESCRIPTION

1 Terminal2 Protection3 Metal bellows4 Interrupter housing5 Shield6 Ceramic insulator7 Shield8 Contacts9 Terminal

10 Interrupter housing

Vacuum interrupterThe spiral geometry of ABB vacuum interruptercontactsThe particular spiral geometry of the contactsgenerates a radial magnetic field in all areas of thearc column, concentrated over the contact circum-ferences.An electromagnetic force is self-generated and thisacts tangentially, causing rapid arc rotation aroundthe contact axis.This means the arc is forced to rotate and toinvolve a wider surface than that of a fixed con-tracted arc.Apart from minimising thermal stress on thecontacts, all this makes contact erosion negligibleand, above all, allows the quenching process to becontrolled even with very high short-circuitscurrents.ABB vacuum interrupters are zero-current interrupt-ers and are free of any re-striking.Rapid reduction in the current density and rapidcondensation of the metallic vapours simultane-ously with the moment of zero current meansmaximum dielectric strength can be restoredbetween the interrupter contacts within a fewthousandths of a second.


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Versions availableThe eVM1 circuit-breakers are available in thefixed and withdrawable version for UniGearswitchgear and PowerCube modules.The eVM1 circuit-breakers are mechanicallyinterchangeable with the circuit-breakers in the VD4and VM1 series which use the same vacuuminterrupters embedded in resin poles.

Fields of application

Thanks to integration of the current sensors and tothe current protection functions, eVM1 circuit-breakers feature great versatility of use, typically forpower supply lines for transformers, motors, powerfactor correction capacitor banks and for allapplications where voltmetric type protections arenot required.

Standards and approvalsThe eVM1 circuit-breakers comply with the IEC62271-100, CEI 17-1 file 1375 Standards and withthose of the major industrialised countries.

The eVM1 circuit-breakers have undergone thetests indicated below and guarantee the safety andreliability of the apparatus in service in any installa-tion.

Type tests: heating, withstand insulation atpower frequency, withstand insulation at light-ning impulse, short-time and peak withstandcurrent, mechanical life, short-circuit currentmaking and breaking capacity, and no-loadcable interruption.

Individual tests: insulation of the main circuitswith voltage at power frequency, auxiliary andcontrol circuit insulation, measurement of themain circuit resistance, mechanical and electri-cal operation.

Electromagnetic compatibility tests: inaccordance with what is defined by the IEC60694, IEC 61000 and EN 50263 Standards.

Service safetyThanks to the complete range of both mechanicaland electrical software locks, safe distributionswitchgear can be constructed with eVM1 circuit-breakers.The locking devices have been studied to preventincorrect operations and to allow inspection of theinstallations guaranteeing maximum operatorsafety.The racking-out device with the door closed onlyallows the circuit-breaker to be racked into or out of

the switchgear with the door closed.


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Technical documentationTo go into technical and application aspects of the eVM1 circuit-breakers indepth, ask for the following publications:

PowerCube modules Code 1VCP000091 UniGear switchgear Code 1VCP000138

Quality SystemComplies with ISO 9001 Standards, certified by anindependent organisation.

Test LaboratoryComplies with UNI CEI EN ISO/IEC 17025Standards, accredited by an independentorganisation.

DESCRIPTION

Environmental Management System

Complies with ISO 14001 Standards, certified byan independent organisation.

Health and Safety Management SystemComplies with OHSAS 18001 Standards, certifiedby an independent organisation.


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Fixed circuit-breakers 16

Withdrawable circuit-breakers for UniGear switchgearand PowerCube modules 18

Accessories on request 21



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A

I I

PL

H

Fixed circuit-breakers

(1) Rated uninterruptedcurrents guaranteedwith withdrawablecircuit-breakerinstalled in UniGearZS1 type switchgearwith air temperature of40 C.


IEC 60694 - 62271-100

CEI 17-1 (File 1375)

Ur [kV]

Us [kV]

Ud (1 min) [kV]

Up [kV]

fr [Hz]

(1) Ir [A]

Isc [kA]

Ik [kA]

Ip [kA]

[O-0,3s-CO-15s-CO]

[ms]

[ms]

[ms]

[ms]

Actuator [N.]

Interrupters [N.]

Rated current [N.]Under short-circuit [N.]

H [mm]

L [mm]

P [mm]

I [mm]

A [mm]

[kg]

[W]

[W]

[C]

IEC 61000

IEC 60255

eVM1 12

12

12

28

75

50-60

630 1250

16 16

20 20

25 25

31.5 31.5

16 16

20 20

25 25

31.5 31.540 40

50 50

63 63

80 80

33

10...15

43...48

50

... 100,000

... 30,000

... 30,000

... 100

461 461 461

450 570 700

464 464 464

150 210 275

205 205 205

106 ...117

< 15

< 110

5 ... + 40

Circuit-breaker

Standards

Rated voltage

Rated insulation voltage

Withstand voltage at 50 Hz

Impulse withstand voltage

Power frequency

Rated normal current (40 C)

Rated breaking capacity

(rated symmetrical short-

circuit current)

Rated short-time

withstand current (3 s)

Making capacity

Operation sequence

Opening time

Arc time

Total quenching time

Closing time

Mechanical operations (cycles)

Electrical operations (cycles)

Maximum overall dimensions

Pole centre distance

Bottom/top terminal distance

Weight

Power consumption at rest

Power consumption after a self-pumping cycle

Service temperature

Electromagnetic compatibility

eVM1 17

17

17

38

95

50-60

630 1250

16 16

20 20

25 25

31.5 31.5

16 16

20 20

25 25

31.5 31.540 40

50 50

63 63

80 80

33

10...15

43...48

50

... 100,000

... 30,000

... 30,000

... 100

461 461 461

450 570 700

464 464 464

150 210 275

205 205 205

106 ...117

< 15

< 110

5 ... + 40


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Types of fixed circuit-breakers

NotesL = Width of the circuit-breaker.I = Horizontal centre distance between

poles.A = Distance between bottom and top

terminal.

Ur Ir (40C) Isc Dimensions Circuit-breaker type

[kV] [A] [kA] L [mm] I [mm] A [mm]

630 16 450 150 205 eVM1 12.06.16 p150630 20 450 150 205 eVM1 12.06.20 p150630 25 450 150 205 eVM1 12.06.25 p150630 31.5 450 150 205 eVM1 12.06.32 p1501250 16 450 150 205 eVM1 12.12.16 p1501250 20 450 150 205 eVM1 12.12.20 p1501250 25 450 150 205 eVM1 12.12.25 p1501250 31.5 450 150 205 eVM1 12.12.32 p150






12

12

12

17.5

17.5

17.5


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I I

PL

H

Withdrawable circuit-breakers for UniGear switchgear and PowerCube modules

(1) Rated uninterruptedcurrents guaranteedwith withdrawablecircuit-breakerinstalled in UniGearZS1 type switchgearwith air temperature of40 C.


IEC 60694 - 62271-100

CEI 17-1 (File 1375)

Ur [kV]

Us [kV]

Ud (1 min) [kV]

Up [kV]

fr [Hz]

(1) Ir [A]

Isc [kA]

Ik [kA]

Ip [kA]

[O-0,3s-CO-15s-CO]

[ms]

[ms]

[ms]

[ms]

Actuator [N.]

Interrupters [N.]

Rated current [N.]Under short-circuit [N.]

H [mm]

L [mm]

P [mm]

I [mm]

A [mm]

[kg]

[W]

[W]

[C]

IEC 61000

IEC 60255

eVM1 12

12

12

28

75

50-60

630 1250

16 16

20 20

25 25

31.5 31.5

16 16

20 20

25 25

31.5 31.540 40

50 50

63 63

80 80

33

10...15

43...48

50

... 100,000

... 30,000

... 30,000

... 100

628 628

503 503

662 662

150 150

205 205

126 ...137

< 15

< 110

5 ... + 40

Circuit-breaker

Standards

Rated voltage

Rated insulation voltage

Withstand voltage at 50 Hz

Impulse withstand voltage

Power frequency

Rated normal current (40 C)

Rated breaking capacity

(rated symmetrical short-

circuit current)

Rated short-time

withstand current (3 s)

Making capacity

Operation sequence

Opening time

Arc time

Total quenching time

Closing time

Mechanical operations (cycles)

Electrical operations (cycles)

Maximum overall dimensions

Pole centre distance

Bottom/top terminal distance

Weight

Power consumption at rest

Power consumption after a self-pumping cycle

Service temperature

Electromagnetic compatibility

eVM1 17

17

17

38

95

50-60

630 1250

16 16

20 20

25 25

31.5 31.5

16 16

20 20

25 25

31.5 31.540 40

50 50

63 63

80 80

33

10...15

43...48

50

... 100,000

... 30,000

... 30,000

... 100

628 628

503 503

662 662

150 150

205 205

126 ...137

< 15

< 110

5 ... + 40


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NotesL = Width of the UniGear switchgear.I = Horizontal centre distance between poles.u/l = Distance between bottom and top terminal. = Diameter of isolating contact.

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Types of withdrawable circuit-breakers for UniGear switchgear and PowerCube modules

Ur Isc Rated uninterrupted current (40C) [A]

kV kA L = 650 Type of circuit-breakerI = 150u/l = 205 = 35

16 630 eVM1/P 12.06.16 p15020 630 eVM1/P 12.06.20 p15025 630 eVM1/P 12.06.25 p15031.5 630 eVM1/P 12.06.32 p15016 1250 eVM1/P 12.12.16 p15020 1250 eVM1/P 12.12.20 p15025 1250 eVM1/P 12.12.25 p15031.5 1250 eVM1/P 12.12.32 p150

16 630 eVM1/P 17.06.16 p15020 630 eVM1/P 17.06.20 p15025 630 eVM1/P 17.06.25 p15031.5 630 eVM1/P 17.06.32 p15016 1250 eVM1/P 17.12.16 p15020 1250 eVM1/P 17.12.20 p150

25 1250 eVM1/P 17.12.25 p15031.5 1250 eVM1/P 17.12.32 p150


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(1) For the characteristicsof the contacts withoutpotential see chapter 3.

(2) With the circuit-breakernot supplied (withoutauxiliary power supply)these contacts areopen, except for thecontact for signallingcircuit-breaker notready for operation

(DO16).

Control circuit power supplyThe energy for operation of the circuit-breaker is provided by one or more capacitors which are keptcharged by a feeder which also sees to the power supply of the electronic circuit. This guaranteescorrect operation even if the auxiliary power supply does not reach the rated value.Thanks to the use of low consumption components, the feeder absorption is about 15 watt with thecircuit-breaker closed or open.After each operation the feeder absorbs about 110 watt for a few seconds to restore the optimal chargelevel of the capacitors.The charging condition of the capacitors is constantly monitored by the electronic module which alsoprovides to the functions of opening, closing, signalling, etc.Two feeders are available:

type 1: 24...48 V a.c. / 24...60 V d.c.

type 2: 100...240 V a.c. / 110...250 V d.c.

Standard fittingsThe basic versions of the withdrawable circuit-breakers are three-pole and fitted with:

closing button (built into the control panel PI1) opening button (built into the control panel PI1) mechanical operation counter mechanical signalling device for circuit-breaker open/closed emergency manual opening device lever for manual emergency opening (the quantity must be defined according to the number of pieces

of apparatus ordered) READY for operation signal, together with a further 11 luminous diagnostic signals on the local

interface of the circuit-breaker one or more capacitors for energy storage for the operation

mobile connector for direct connection to the sockets of the electronic module, for cabling the auxiliarycircuits basic version control module with protections I> - I>> - Io> - Io>> (51-50-51N-50N) software for configuration of the protections, control and display of the state transmitted contacts in the trolley (-BT1; -BT2).

Basic version of monitoring moduleThe monitoring module has 16 inputs and 16 outputs of the digital type, the majority of which can befreely programmed via the configuration software to suit the requirements of the system.Consult schematic drawings 1VCD400060 for all the application meanings of the switch.Amongst the fixed, non-programmable inputs:

input for the minimum voltage function remote opening and closing controls disabling of the opening manoeuvre second switch opening via hardware only, to provide the utmost reliability.Amongst the fixed, non-programmable outputs:

switch closed and open signal that unit is ready for RL2 (locking magnet on carriage) monitoring signal.All the remaining inputs and outputs are mapped according to pre-defined meanings if one of the fourdefault application layouts is selected (switch removable, removable with grounding switch, fixed, fixedwith grounding switch) by means of the software configurator, while all the available meanings can beallocated to the digital inputs/outputs by ticking off the free layout (consult the Input / Output Mappingchapter).For example:

grounding switch position, open and closed functional interlocks local remote control enabling keys

protection activation reset local switch closing and opening command.


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1 Interface for panel (HMI)The interface allows the control and protection device incorporated in theeVM1 circuit-breaker to be managed from the low voltage compartment doorof the unit.

Accessories on request

2 Extended set of protectionsThe extended set of protections makes available, apart from the followingbasic protections (ref. IEC 60255-3 and IEC 60225-8):

51 Overcurrent IDMT (NI, VI, EI, LI) 51 Overcurrent DT1 50 Overcurrent DT2 51N Earth fault IDMT 51N Earth fault DT1 50N Earth fault DT2the following additional protections:

51MS Motor starting protection 66 Number of start-ups 51LR Locked rotor 49 Thermal overload 46 Unbalanced load.The protections can be enabled/disabled locally by means of an RS485 port(local) or by the panel interface with IRDA connector by means of the configu-ration software.

And for the outputs: switch in service or being tested protection activated functional interlocks protections in timed mode (start) switch opened by protection opening commands (transitory contact made for 100 ms) opening and closing manoeuvres disabled.The meanings of the outputs can be programmed several times with the same function. For example,three outputs to indicate the switch open position.The binary inputs can be powered in the following way: 24 ... 240 V AC ( 15% ... + 10% tolerance) 24 ... 250 V DC ( 30% ... + 10% tolerance).To be considered valid, the pulse must last at least 5 10 ms, approx.The monitoring module carries out the following functions:

auto-opening after the switch not correct status has been detected auto-lock after a condenser charging threshold that is less than the minimum value required for the

opening and closing manoeuvre; self-opening if the condition persists (Energy Failure Autotrip) antipumping relay function trip-free condenser charging voltage monitoring function with power supplier auto-switch-off if the

maximum charge level is exceeded opening for minimum voltage condition with nominal reference voltage selection and the ability to

delay opening from 0 to 5 s (-SO4) auto-protection of the electronic power circuit with power supplier auto-switch-off in the event of

overtemperature and/or overcurrent opening and closing coil continuity monitoring watchdog (DO16).


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Fig. 4.JPG


3 Fast capacitor discharging device (CFD)Device which allows the circuit-breaker capacities to be discharged rapidlyand safety.

4 Cable for configuring eVM1 by means of HMI with USB/RS 232 - Irda

connectionCable which allows the personal computer to be connected to the interfacefor the HMI panel to configure the eVM1.

5 Connection cable Kit for configuring the eVM1 when there is no HMIKit which makes it possible to have an RS485 port in the low voltage com-partment of the panel to connect the personal computer to in those caseswhere there is no HMI.

6 eVM1 RS232/USB - RS485 configuration cableCable which allows the personal computer to be connected to the RS485port prepared in the low voltage compartment of the panel to configure the

eVM1.


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3

Resistance to vibrations 24

Tropicalisation 24

Altitude 24

Characteristics of the contacts without potential 25

Control electronics and information management 26

Circuit-breaker operation 26

Configuration software of the protections, control anddisplay of the state 27

Architecture of the electronic control and information managementmodule of the eVM1 circuit-breaker 28

The current sensor 28

Panel interface: HMI 30

Environmental protection programme 31

Spare parts and ordering 31



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Ka = e m (H 1000)/8150 (IEC 60071-2)


Resistance to vibrationsThe eVM1 circuit-breakers are unaffected bymechanically generated vibrations.Please contact us for the versions approved byshipping registers.

TropicalisationThe eVM1 circuit-breakers are manufactured incompliance with the strictest regulations for use inhot-humid-saline climates.

All the most important metal parts are treatedagainst corrosive factors according to UNI 3564-65Standards environmental class C.Galvanisation is carried out in accordance with UNIISO 2081 Standards, classification code Fe/Zn 12,with a thickness of 12x10 -6 m, protected by aconversion layer mainly consisting of chromates incompliance with the UNI ISO 4520 Standards.These construction characteristics mean that all theeVM1 series of apparatus and their accessoriescomply with climate graph 8 of the IEC 60721-2-1and IEC 60068-2-2 (Test B: Dry Heat).

AltitudeThe insulating property of air decreases as thealtitude increases, therefore this phenomenon mustbe taken into account for external insulation of theapparatus (the internal insulation of the interruptersdoes not undergo any variations as it is guaranteedby the vacuum).The phenomenon must always be taken intoaccount during the design stage of the insulatingcomponents of apparatus to be installed over 1000m above sea level.In this case a correction coefficient must beconsidered, which can be taken from the graph on

the following page, built up on the basis of theindications in the IEC 60694 Standards.The following example gives a clear interpretationof the indications given above.

Example Installation altitude: 2000 m Rated service voltage of 12 kV Industrial frequency withstand voltage: 28 kV rms Impulse withstand voltage: 75 kVp Ka factor, which can be taken from the graph =

1.13.

Considering the above parameters, the apparatusmust withstand (under test at zero altitude, i.e. atsea level):

power frequency withstand voltage:

28 x 1.13 = 31.6 kVrms

impulse withstand voltage:

75 x 1.13 = 84.7 kVp.

From the above, it can be deduced that for installa-tions at an altitude of 2000 m above sea level, with12 kV service voltage, the apparatus must beprovided with 17.5 kV rated voltage, characterisedby insulation levels at industrial frequency of 38

kVrms with 95 kVp impulse withstand voltage.

Graph for determining the Ka correction factor accordingto the altitudeH = altitude in metres;m = value referred to power frequency and to the

lightning impulse withstand and between phasevoltages.


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3

Curve AMaximum power applicable (V d.c./a.c. on resistive load).

Rated voltage 0 ... 264 V~ 50/60 Hz(range of operation) 0 ... 280 V Maximum power applicable 1500 VA (V a.c. on resistive load)

(V d.c. on resistive load - curves A)Maximum voltage applicable 400 V~ 50/60 Hz

300 V Maximum current applicable 6 ARated current 6 A (250 V~ 50/60 Hz -resistive load)Maximum contact resistance < 100 mohm (measured at 6 V / 1 A)Maximum capacity < 1.5 pFMaximum closing time < 5 msMaximum opening time < 3 msInsulation between contacts and coil 4000 Vrms (50 Hz / 1 min)Resistance with contacts open Min. 10 3 Mohm (measured at 500 V)Operating temperature - 40 C ... + 85 CStorage temperature - 40 C ... + 100 C

Mechanical life 500,000 operations (at 250 V~ 50/60 Hz - 180operations/min)Electrical life 50,000 operations (at 6 A / 277 V~ 50/60 Hz -

resistive load - see curves B and C) Curve BElectrical life of the contacts at 250 V a.c.

O p e r a

t i o n s

Characteristics of the contacts without potentialThe contacts without potential are provided with special relays.For the characteristics of the contacts, please see the table and curves given below.

Notes In the case of inductive loads, the contacts must be protected against overvoltages by means of varistors. For the other character istics, please refer to the IEC 60694.5.4.4.5.4 (Ed. 2.2), Class 3 Standards.

O p e r a

t i o n s

Curve CElectrical life of the contacts at 24 V d.c.

N .

O p e r a

t i o n s

Current [A]


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All the functions described are provided by twomodules.

1. Main processing module with integratedfeeder: this has the function of charging thecapacitors for operation of the magnetic drive. Italso sees to acquiring the analog signals and toanalog-digital conversion of the signals comingfrom the Rogowski coils (current sensors).The analog signals are sampled and the currentvalues are calculated by means of a digital Fouriertransform (DFT) at the network frequency.By means of the control unit, it carries out currentmeasurement, activates the protections, monitor-ing, signalling and watchdog.The information is exchanged with the binary I/Ocard. The card incorporates an RS485 port forcommunication with the configuration softwareand the HMI.

2. Binary I/O module: this includes 16 insulatedbinary inputs with wide range and 16 outputs withrelay contacts for cabling the circuit-breaker and

the switchgear.

Operation of the circuit-breakerOperation of the eVM1 is very similar to operationof a traditional circuit-breaker. Remote or localoperation can be enabled either by means of acircuit-breaker with key integrated in the interfaceplaced in the low voltage compartment door of theswitchgear panel or by means of a binary input.Red and green LEDs indicate the true positions ofthe circuit-breaker, of the isolating truck and of theearthing switch.The circuit-breaker can be seen through theinspection widow of its own compartment. The doorcan only be opened with the circuit-breaker isolatedand the earthing switch closed. Under theseconditions, the circuit-breaker can be operatedlocally by means of its own control and signallinginterface.

Monitoring and protecting electronics



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3

The interface located on the low voltage compart-ment door has a port with infrared rays. With thehelp of a laptop computer, the proper cable andthe configuration software, it is possible to accessall the information regarding the states of theoperating devices and of the eVM1 circuit-breaker.Readout of all the phase currents and of the earthfault current is possible. Thanks to the software,the circuit-breaker can be completely configured(general settings and assignment of inputs andoutputs). When a protection function trips, thecircuit-breaker must be reset before attemptingclosing. To reset it, you can work using theconfiguration software or by means of the interfacelocated in the low voltage compartment of thepanel. Should this not be available, an alternativeis to press the circuit-breaker opening pushbuttonO for 5 s.The switch can reclose in the blocked statuscaused by the relay having tripped when therespective function is enabled. This is useful whenthe switch is used in auto-reclosing cycles.

The configuration software can also be used toselect, parameterise and display the state of theprotection. The basic protection functions cover thefollowing applications for feeder protections:inverse time fault (IDMT) and definite time (DT)phase and earth fault. Furthermore, the extendedversion allows a series of motor protection func-tions: start-up, locked rotor and number of start-ups, unbalanced load and thermal overloadprotection functions.The protections, together with display of thevalues measured can also be enabled andconfigured directly from the front of the circuit-breaker in the test position and with the shieldremoved, by means of an RS485cable with 9-pole connector.

Input/output configuration page:- flexible mapping of logical events on

I/O.

Monitoring page:- complete indication of the state of the

panel- all the logical indications- readout of the analog values- circuit-breaker opening/closing com-

mands- protection start-up/trip/resetting.

Protection page:- selection of protection- configuration setting.

Software for configuration of the protections, controland display of state


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Architecture of the electronic control and information management module of theeVM1 circuit-breaker

16 Binary outputs

16 Binaryinputs

4 AnaloginputsControl

unit

Powerelectronics

Magneticdrive

Auxiliary powersupply

Storage unit

Currentsensors


Feeder

PC

The current sensorThe Rogowski coil consists of a solenoid woundover a non-magnetic core whose ends areaccessible (see figure), destined to supply themeasuring instrument with power. The operatingprinciple it is based on is mainly that of a mutualinductor linked to the magnetic field produced bythe currents subject to measurement and istherefore, by its nature, a transducer aimed atdetecting currents variable over time.The Rogowski coil bases its operation on applica-tion of the Ampere theorem on the basis of whichthe integral of the magnetic field vector along a Geometry of

the Rogowski coil.

IRDA


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3

closed line equals the sum of the currents whichpass across the surface subtended by this line.

There are various advantages obtained by usingthe Rogowski coil, among which:

absolute linearity of the output signal as afunction of the one measured

no saturation no currents magnetising the metallic core

important at low values for the current transform-ers

no hysteresis phenomena.

When switch eVM1 was designed, the characteris-tics described above allowed a single size ofsensor to be used with class 1 accuracy, able tocover all the current ratings from 50 to 1250 A andto protect against short circuits up to 31.5 kA.

Comparison of the response characteristic of the Rogowski coil with that of a currenttransformer.

Current sensor used in eVM1 circuit-breakers.

Current sensors withoutferromagnetic core

Current transformers withferromagnetic core

Saturation

Primary current / In

S e c o n

d a r y c u r r e n

t


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Panel interface: HMIIn order to be able to manage the protection andcontrol system incorporated in the eVM1 easily, aninterface is available (HMI Human MachineInterface) located on the low voltage compartmentdoor of the panel.

This interface has the following functions: it allows control of the circuit-breaker by means

of the opening and closing pushbuttons it shows the mimic diagram of the single-line

panel diagram by using very bright green and redLEDs it contains a two-line display which normally

shows the maximum phase current and the earthcurrent (ammeter function), which, by means ofthe navigation pushbuttons, allows navigationaround the eVM1 menu

it allows the protection to be reset after a trip it shows the state of the protections by means of

two LEDs, one for the phase fault and one for theearth fault

it allows connection to a personal computer bymeans of the IrDA port

by means of a 4-position key, it allows local orremote control of the circuit-breaker, or both, orcircuit-breaker locking in the open position.

The HMI is connected to the electronics on boardthe circuit-breaker by means of two bushingconductors using the plug socket of the circuit-breaker itself.The HMI has a universal powersupply.In fact, it can be supplied with direct voltages from24 to 250 Vdc or with alternating voltages at 50 and60 Hz from 24 to 240 Vac.



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3CARATTERISTICHE SPECIFICHE DI PRODOTTO

3CARATTERISTICHE SPECIFICHE DI PRODOTTOCARATTERISTICHE SPECIFICHE DI PRODOTTOCARATTERISTICHE SPECIFICHE DI PRODOTTO

3CARATTERISTICHE SPECIFICHE DI PRODOTTO

3333

Spare parts and ordering Position sensors Position contact of the withdrawable truck Contacts signalling connected/isolated Isolation interlock with the door HMI Local control panel 1MRS050698 A1 infrared cable for configuration RS232/RS485 or USB/RS485 converter.

For availability and to order spare parts, please

contact our Service department, specifying thecircuit-breaker serial number.

Environmental protection programmeThe eVM1 circuit-breakers are manufactured inaccordance with the ISO 14000 Standards(Guidelines for environmental management).The production processes are carried out incompliance with the Standards for environmentalprotection in terms of reduction in energy con-sumption as well as in raw materials and produc-tion of waste materials. All this is thanks to themedium voltage apparatus manufacturing facilityenvironmental management system.

Assessment of the environmental impact of the lifecycle of the product, obtained by minimisingenergy consumption and overall raw materials ofthe product, became a concrete matter during thedesign stage by means of targeted selection of thematerials, processes and packing.This is to allow maximum recycling at the end ofthe useful life cycle of the apparatus.



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4OVERALL DIMENSIONS

Fixed circuit-breakers 34

Withdrawable circuit-breakers for UniGear and PowerCube modules 35

HMI: eVM1 interface 36


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TN 1VCD000096

TN 1VCD000097

OVERALL DIMENSIONS


eVM1

TN 1VCD000096

Ur 12 kV17.5 kV

Ir 630 A1250A

Isc 16 kA20kA

25 kA31.5 kA

eVM1

TN 1VCD000097

Ur 12 kV17.5 kV

Ir 630 A1250A

Isc 16 kA20kA25 kA31.5 kA


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4

TN 1VCD000094

TN 1VCD003281

Withdrawable circuit-breakers for UniGear and PowerCube modules


eVM1

TN 1VCD000094

Ur 12 kV17.5 kV

Ir 630 A1250A

Isc 16 kA20kA

25 kA31.5 kA

eVM1/P

TN 1VCD000096

Ur 12 kV17.5 kV

Ir 630 A1250A

Isc 16 kA

20kA25 kA31.5 kA


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4

HMI: eVM1 panel interface

Door cut-out

OVERALL DIMENSIONS


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5

Diagrams of the applications 38

State of operation shown 44

Caption 44

Description of figures 44

Notes 44

Graphic symbols of electrical diagrams 47



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Application layoutsThe following layout 1VCD400060 depicts thecircuits of removable switches eVM1/P consignedto the customer by means of connector -XB1.Refer to layout 1VCD 400089 for the fixed switches.However, to keep up to date with product develop-ments, it is always advisable to refer to the circuitrylayout supplied with each switch.



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5


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5


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MOTHERBOARD

ActuatorCapacitor/s

Voltage supply

FIXED DO

FIXED DIDO 16DI 16

Input for ON/OFFposition signal (sensors)

Keyboard for localcommand


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5

I/O BOARD

DIGITAL OUTPUTCONFIGURABLE

DIGITAL INPUTCONFIGURABLE

DIGITAL OUTPUTFIXED

DIGITAL OUTPUTCONFIGURABLE

DIGITAL INPUTFIXED


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State of operation shownThe diagram is shown under the following conditions:- circuit-breaker open and connected- circuits de-energised

Caption= Number of diagram figure

* n) = See the note indicated by the letter-QB = Circuit-breaker applications-OBI = Medium voltage circuit-breakerL1 = Phase L1

L2 = Phase L2L3 = Phase L3-Pl1 = Human Machine Interface keypad with

opening and closing pushbuttons and signals-BC1 = Current sensor (Rogowski) phase L1-BC2 = Current sensor (Rogowski) phase L2-BC3 = Current sensor (Rogowski) phase L3-TR = Electrical control and actuation unit-BN = Earth current t ransformer-BB9 = Position contact for signalling circuit-breaker

closed (limit switch with auxiliary powersupply)

-BB10 = Position contact for signalling circuit-breakeropen (limit switch with auxiliary power supply)

-BD = Position contact of the door-BT1 = Auxiliary truck contacts of the for electrical

signalling of circuit-breaker connected-BT2 = Auxiliary truck contacts of the for electrical

signalling of circuit-breaker isolated-CC1-CC2 = Capacitors-MC = Closing coil- MO = Opening coil-RL2 = Locking magnetic on the truck-SC2 = Pushbutton or contact for remote circuit-

breaker closing-SL1 = Circuit for locking circuit-breaker closing (with

contact closed, closing is enabled)-SL2 = Contact for locking circuit-breaker opening

circuit-breaker (with contact closed, opening isenabled)-S02 = Pushbutton or contact for remote circuit-

breaker opening-S03 = Auxiliary opening and safety contact-S04 = Pushbutton or contact for opening with no

circuit-breaker power (contact closed withvoltage present)

-WS = Interfaccia seriale per operazioni di servizio(interfaccia RS 485)

-XB = Serial interface for service operations (RS 485interface)

-XB1 = Connector of the circuit-breaker circuits-XB8 = Connector of the switchgear circuits-XB9 = Auxiliary contact connected and isolated

connector

-XB20 = Earth current sensor connector-XB21 = Connector for position sensors BS3 and

BS4-XB22 = Connector for the auxiliary power supply-XB23 = Connector for the actuator and for the

capacitor/s-XB24 = Connector for serial interface (RS 485

interface)-XB25 = Analog input connector phase L3-XB26 = Analog input connector phase L2-XB27 = Analog input connector phase L1-XB28 = Motherboard digital input connector

-XB29 = Connector for the local pushbutton panel-XB32 = Configurable digital output connector-XB33 = Configurable digital input connector-XB34 = Fixed digital input connector-XB35 = Configurable fixed digital output connector

Description of figuresFig. 1 = Basic circuits of the circuit-breaker and of the

eVM1 magnetic driveFig. 2 = Keypad for local controlsFig. 3 = Analog inputs for eVM1 circuit-breaker

Fig. 4 = Fixed digital inputs for eVM1 circuit-breakerFig. 5 = Configurable digital inputs for eVM1 circuit-

breakerFig. 6 = Fixed digital outputs for eVM1 circuit-breakerFig.11 = Configurable digital outputs for eVM1 circuit-

breakerFig. 13 = Auxiliary contacts of the truck available but not

cabled in plug -XB

NotesA) Fix the copper strips for the earthing connection

under the vibrostop in the unpainted area.

B) For insulation tests, disconnect the copper strip forthe earthing connection under the vibrostop in theunpainted area.

C) If the earthing toroid is not present, short-circuit pin XB/38 with XB/39

D) Serial interface for service operations (RS485interface) and connection with the HMI

E) To set the DIP switches, please see the InstructionManual

F) The circuit-breaker is only fitted with the applicationsspecified in the order acknowledgement.

G) CFD (Capacitor Fast Discharge) connector.Attention: consult the instruction manual.


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5

Dl 1 Dl 1 Dl 1 Dl 1 Dl 1




Dl 5 Dl 5 Dl 5 Dl 5

Dl 6 Dl 6 Dl 6 Dl 6

Dl 7 Dl 7 Dl 7 Dl 7

Dl 4 Dl 4

Dl 5 Dl 5

Dl 8 Dl 8 Dl 8 Dl 8

Dl 9 Dl 9 Dl 9 Dl 9

Dl 10 Dl 10

Dl 11 Dl 11

Dl 12 Dl 12

Dl 13 Dl 13

Dl 16 Dl 16 Dl 16 Dl 16 Dl 16

DI...

# = Active low level (not supplied)

Under voltage / NegateOpen commandClose commandfrom remoteOpen commandfrom remote

# Circuit-breaker Opendisabling

# Circuit-breaker Closeddisabling

Circuit-breaker in ServicepositionCircuit-breaker in TestpositionLine disconnectorClosedLine disconnectorOpenLine disconnectorClosen to earth

Line disconnector operating rodinsertedEarthing switchOpenEarthing switchClosedEarthing switch operating roadinserted

Interlock Input 1

Interlock Input 2

# Local / Remoteselection Key

Trip Signal and

Anomaly ResetClosed commandfrom localOpen commandfrom local

Auxiliary Supply Monitoring

Second Safety Open circuit-breakercommand (Hardware only)

DEFAULT CONFIGURATION TABLE DIGITAL INPUTSEvent: Inputs Withdrawabble Withdrawabble Withdrawabble Withdrawabble Free

Circuit-breaker Circuit-breaker Circuit-breaker Circuit-breaker Configurationwith HMI with with

earthing earthing switchswitch and HMI

on HMI on HMI

on HMI and Dl 11 on HMI and Dl 11

on HMI on HMI

on HMI on HMI

Not available ConfigurablePrefixedNot modifiable

Only without HMI


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DO 1 DO 1 DO 1 DO 1 DO 1

DO 2 DO 2 DO 2 DO 2 DO 2

DO 3 DO 3 DO 3 DO 3

DO 4 DO 4 DO 4 DO 4

DO 5 DO 5 DO 5 DO 5

DO 6 DO 6 DO 6 DO 6

DO 7 DO 7 DO 7 DO 7

DO 8 DO 8 DO 8 DO 8

DO 9 DO 9 DO 9 DO 9

DO 10 DO 10 DO 10 DO 10

DO 11 DO 11 DO 11 DO 11

DO 12 DO 12 DO 12 DO 12

DO 13 DO 13 DO 13 DO 13

DO 8

DO 14 DO 14 DO 14 DO 14

DO 15 DO 15 DO 15 DO 15

DO 16 DO 16 DO 16 DO 16 DO 16

DO...


WD = Microprocessor operation# = Active low level (not supplied)

Not available ConfigurablePrefixedNot modifiable

Closed circuit-breaker

Open circuit-breaker

Circuit-breaker in Service position

Circuit-breaker in Test position

Line disconnector closed

Line disconnector open

Line disconnector closed to earth

Earthing switch closed

Earthing switch open

Unit ready

Unit not ready

Anomaly

Output for truck locking magnet-RL2

Protection trip 1

Protection start 1

Protection start 2

Protection trip 2

Circuit-breaker Openedfor under voltageCircuit-breaker Openedtransient contact

Interlocking Output 1

Interlocking Output 2

# Circuit-breaker opening disabled

# Circuit-breaker closing disabled

Local mode

Remote mode

Auxiliary Supply Monitoring

WD not ready

DEFAULT CONFIGURATION TABLE DIGITAL OUTPUTSEvents: Outputs Withdrawabble Withdrawabble Withdrawabble Withdrawabble Free

Circuit-breaker Circuit-breaker Circuit-breaker Circuit-breaker Configurationwith HMI with with

earthing earthing switchswitch and HMI

Only if relative DI(Digital Input) is selected


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5

Graphic symbols for electric diagrams (Standards IEC 60617 and CEI 3-14 ... 3-26)

Insulated digital

binary input

Thermal effect

Electromagneticeffect

Timing

Pushbuttoncontrol

Key control

Earth(general symbol)

Motor (generalsymbol)

Rectifier with twohalf-waves(bridge)

Make contact

Break contact

Changeover contact

with momentaryinterruption

Capacitor(general symbol)

Exposedconductive part,frame

Conductors inscreened cable (twoconductors shown)

Connection ofconductors

Terminal or clamp

Socket andplug (femaleand male)

Resistor (generalsymbol)

Passing contact withmomentary closingduring release

Make positioncontact (limitswitch)

Break positioncontact (limitswitch)

Power circuit-breaker withautomatic opening

Control coil(general symbol)

Lamp (generalsymbol)

Cordedconductors or cables(two conductorsshown)

Delayed movement(in the direction ofthe arc movementtowards its centre)


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ABB S.p.A.Power Products DivisionUnit Operativa Sace-MV

Via Friuli, 4I-24044 Dalmine

Tel.: +39 035 6952 111Fax: +39 035 6952 874e-mail: [email protected]

ABB AGCalor Emag Medium Voltage Products

Oberhausener Strasse 33 Petzower Strasse 8D-40472 Ratingen D-14542 GlindowPhone: +49(0)2102/12-1230, Fax: +49(0)2102/12-1916E-mail: [email protected] s.r.o.

www.abb.com

Contact us

The data and illustrations are not binding. We reser-ve the right to make changes without notice in thecourse of technical development of the product.

Copyright 2009 ABB. All righ ts reserved.

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magnetic circuit breaker

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