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VD4Medium voltage vacuum circuit-breakers

12 ... 24 kV - 630 ... 2500 A - 16 ... 31,5 kA

IndustrialTM

enabledIT

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DESCRIPTION

CIRCUIT-BREAKER SELECTION AND ORDERING

SPECIFIC PRODUCT CHARACTERISTICS

OVERALL DIMENSIONS

ELECTRICAL CIRCUIT DIAGRAM

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General 4

Interrupting principle 6

Versions available 6

Fields of application 6

Standards and approvals 6

Service safety 7

Accessories 8

Operating mechanism 8

Technical documentation 10

Quality Assurance System 10

Test laboratory 10

Environmental Management System 10

DESCRIPTION

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DESCRIPTION

GeneralThe new VD4 are a synthesis of the renownedtechnology in designing and constructing vacuuminterrupters embedded in resin poles, and ofexcellency in design, engineering and productionof circuit-breakers.The VD4 medium voltage circuit-breakers usevacuum interrupters embedded in resin poles.Embedding the interrupter in resin makes thecircuit-breaker poles particularly sturdy andprotects the interrupter against shocks,accumulation of dust and humidity.The vacuum interrupter houses the contacts andmakes up the interrupting chamber.

Current interruption in vacuum

The vacuum circuit-breaker does not require aninterrupting and insulating medium.

In any case, on separation of the contacts a metalvapour arc is generated made up exclusively ofmelted and vaporised contact material.The metal vapour only remains supported by theexternal energy until the current is cancelled in thevicinity of natural zero. At that instant, the rapidreduction in the load density carried and the rapidcondensation of the metallic vapour, leads toextremely rapid dielectric recovery.The vacuum interrupter therefore recovers theinsulating capacity and the capacity to withstandthe transient return voltage, definitivelyextinguishing the arc.Since high dielectric strength can be reached inthe vacuum, even with minimum distances,interruption of the circuit is also guaranteed when

In fact the interrupters,do not containionisable material.

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These characteristics allow opening and closingoperations independent of the operator.The VD4 circuit-breaker operating mechanism isis of simple conception and use and can becustomised with a wide range of accessorieswhich are easy and rapid to install. This simplicityconverts into greater reliability of the apparatus.

The structure

The operating mechanism and the poles are fixedto a metal frame which is also the support for thefixed version of the circuit-breaker. The compactstructure ensures sturdiness and mechanicalreliability.Apart from the isolating contacts and the cord withplug for connection of the auxiliary circuits, thewithdrawable version is completed with the truckfor racking it into and out of the switchgear orenclosure with the door closed.

separation of the contacts takes place a fewmilliseconds before passage of the currentthrough natural zero.The special contacts design and material, as wellas the limited duration and the low voltage of thearc, guarantee minimum contact wear and longlife. Furthermore, the vacuum prevents theiroxidation and contamination.

EL type operating mechanism

The low speed of the contacts, together with thereduced run and the low mass, limit the energyrequired for the operation and therefore guaranteeextremely limited wear of the system. The circuit-breaker is therefore limited in maintenance.The VD4 circuit-breakers use a mechanicaloperating mechanism, with stored energy and freerelease.

Vacuum interruption technique

Vacuum contacts protected against oxidationand contamination

Vacuum interrupter embedded in theresin poles

Interrupter protected against shocks, dustand humidity

Operation under different climatic conditions

Limited switching energy

Stored energy operating mechanism withanti-pumping device supplied as standard

Simple customisation with a completerange of accessories

Fixed and withdrawable version

Compact dimensions

Sealed-for-life poles

Sturdiness and reliability

Limited maintenance

Circuit-breaker racking in and racking outwith door closed

Incorrect and hazardous operations areprevented thanks to special locks in theoperating mechanism and in the truck

Excellent environmental compatibility

Vacuum interrupter embedded in resin pole

1 Upper terminal2 Vacuum interrupter3 Epoxy resin housing4 Stem of moving

contact5 Lower terminal6 Flexible connection

7 Tie-rod spring fork8 Tie-rod9 Pole fixing

10 Connectionto operatingmechanism

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DESCRIPTION

Interrupting principle of ABB interrupters

In a vacuum interrupter, separation of current-carrying contacts initiates the vacuum arc andthis is maintained until the next current zero and can be influenced by magnetic fields.

Vacuum arc – diffuse or contracted

Following contact separation, single melting points form over the entire surface of the cathode,producing metal vapours which support the arc. The diffuse vacuum arc is characterised by expansionover the contact surface and by an even distribution of thermal stress on the contact surfaces.At the rated current of the vacuum interrupter, the electric arc is always of the diffuse type. Contacterosion is negligible, and the number of current interruptions very high.As the interrupted current value increases (above the rated value), the electric arc tendsto be transformed from the diffuse into the contracted type, due to the Hall effect.Starting at the anode, the arc contracts and as the current rises further it tends to become sharplydefined. Near the area involved there is an increase in temperature with consequent thermal stress onthe contact.To prevent overheating and erosion of the contacts, the arc is kept rotating. With arc rotation itbecomes similar to a moving conductor which the current passes through.

The spiral geometry of ABB vacuum interrupter contactsThe special geometry of the spiral contacts generates a radial magnetic field in all areas of the arccolumn, concentrated over the contact circumferences.An electromagnetic force is self-generated and this acts tangentially, causing rapid arc rotation aroundthe contact axis.This means the arc is forced to rotate and to involve a wider surface than that of a fixed contractedarc.Apart from minimising thermal stress on the contacts, all this makes contact erosion negligible and,above all, allows the interruption process even with very high short-circuits.ABB vacuum interrupters are zero-current interrupters and are free of any re-striking.Rapid reduction in the current charge and rapid condensation of the metal vapours simultaneously withthe zero current, means maximum dielectric strength can be restored between the interrupter contactswithin microseconds.

1 Stem/terminal2 Twist protection3 Bellows4 Interrupter housing5 Shield6 Ceramic insulator7 Shield8 Contacts9 Terminal

10 Interrupter housing

Standards and approvalsThe VD4 circuit-breakers comply with theIEC 62271-100, CEI 17-1 file 1375 Standards andwith those of the major industrialised countries.The VD4 circuit-breakers have undergone thetests indicated below and guarantee the safetyand reliability of the apparatus in service in anyinstallation.

• Type tests: heating, withstand insulation atindustrial frequency, withstand insulation atatmospheric impulse, short-time and peakwithstand current, mechanical life, short-circuitcurrent making and breaking capacity, and no-load cable interruption.

Versions availableThe VD4 circuit-breakers are available in the fixedand withdrawable version with front operatingmechanism. The withdrawable version is availablefor UniGear ZS1 type switchgear and Unisafeswitchgear.

Fields of applicationThe VD4 circuit-breakers are used in electricaldistribution for control and protection of cables,overhead lines, transformer and distributionsubstations, motors, transformers, generators andcapacitor banks.

Vacuum interrupter

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• Individual tests: insulation of the main circuitswith voltage at industrial frequency, auxiliarycircuit and operating mechanism insulation,measurement of the main circuit resistance,mechanical and electrical operation.

Service safetyThanks to the complete range of mechanical andelectrical locks (available on request), it is possi-ble to construct safe distribution switchgear withthe VD4 circuit-breakers.The locking devices have been studied to preventincorrect operations and to inspect the installationswhilst guaranteeing maximum operator safety.

Key locks or padlock devices enable opening andclosing operations and/or racking in and rackingout.The racking-out device with the door closedallows the circuit-breaker to be racked into or outof the switchgear only with the door closed.Anti-racking-in locks prevent circuit-breakers withdifferent rated currents from being racked in, andthe racking-in operation with the circuit-breakerclosed.

Schematic diagram of the transition from a diffuse arc to acontracted arc in a vacuum interrupter.

Development of current and voltage trends during a single phasevacuum interruption process.

Radial magnetic field contact arrange-ment with a rotating vacuum arc.

Diffuse arc. Contractionover anode.

Contraction overanode andcathode.

Cur

rent

, vol

tage Short-circuit current

System voltage

Arc voltage

Short-circuit currentinterruption

Recovery voltage(system frequency)

Transient recovery voltage (TRV)(high frequency)

Contactseparation

Time

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DESCRIPTION

Highly reliable operating mechanisms thanks to a low number ofcomponents which are manufactured using production systems forlarge quantities

Extremely limited and simple maintenance

The accessories are common to the whole range and are identical foreither a.c. or d.c. applications

The electrical accessories can be installed or replaced easily andrapidly thanks to the cabling which is already prepared with its ownplug-socket connectors

Mechanical anti-pumping device is supplied as standard

Built-in closing spring charging lever

Key lock with circuit-breaker open

Protective covering over the opening and closing pushbuttons to beoperated using a special tool

Padlock device on the switching pushbuttons

AccessoriesThe VD4 circuit-breakers have a complete rangeof accessories to satisfy all installation require-ments.The operating mechanism has a standardisedrange of accessories and spare parts which areeasy to identify and order.The accessories are installed conveniently fromthe front of the circuit-breaker. Electrical connec-tion is carried out with plug-socket connectors.Use, maintenance and service of the apparatusare simple and require limited use of resources.

Operating mechanismThe mechanical operating mechanism is of simpleconception and use can be customised with awide range of accessories which are easy andrapid to install. This simplicity converts into greaterreliability of the apparatus.The operating mechanism is of the stored energytype, has the anti-pumping device mounted asstandard and is fitted with suitable locks to preventincorrect operations.Each operation sequence is only enabled if all theconditions ensuring it being carried out correctlyare respected.The accessories are the same for all types of VD4circuit-breaker.To facilitate assembly and replacement of acces-sories, assembly seats with appropriate fixedstrikers are provided.

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Circuit-breaker operating mechanism

A Open/closed auxiliary contactsB Geared motor for closing spring chargingC Built-in closing spring charging leverD Mechanical signalling device for circuit-breaker

open/closedE Mechanical operation counterF Plug-socket connectors of electrical accessoriesG Signalling device for closing springs charged/

dischargedH Service releaseI Closing pushbuttonL Opening pushbuttonM Operating mechanism locking electromagnetN Additional shunt opening releaseO Transient contact

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Technical documentationTo obtain in-depth knowledge of technical and application aspects of the VD4circuit-breakers please ask for the following publications:

– UniSafe switchgear code 1VCP000062

– UniGear ZS1 type switchgear code 1VCP000138

– REF 542plus unit code 1VCP000058

– PR512 protection unit code 1VCP000055

DESCRIPTION

Environmental ManagementSystemComplies with the ISO 14001 Stand-ards, certified by an external inde-pendent organisation.

Quality Assurance SystemComplies with the ISO 9001 Standards, certifiedby an external independent organisation.

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

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2CIRCUIT-BREAKER SELECTION AND ORDERING

General characteristics of fixed circuit-breakers 12

Types of fixed version circuit-breakers available 14

General characteristics of withdrawable circuit-breakersfor UniGear type ZS1 switchgear 16

Types of withdrawable circuit-breakers availablefor UniGear type ZS1 switchgear 18

General characteristics of withdrawable circuit-breakersfor UniSafe switchgear 20

Types of withdrawable circuit-breakers availablefor UniSafe switchgear 22

Optional accessories 24

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General characteristicsof fixed circuit-breakers(12 - 17.5 - 24 kV)


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Circuit-breaker

Standards

Rated voltage

Rated insulation voltage

Withstand voltage at 50 Hz

Impulse withstand voltage

Rated 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

Arcing time

Total breaking time

Closing time

Maximum overall dimensions

Pole centre distance

Dimension standardized table

Operating temperature

Tropicalization

Electromagnetic compatibility

VD4 12

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75

50-60

630 630 630 1250 1250 1250 1600 1600 1600 2000 2000 2500

16 16 16 16 16 16 – – – – – –

20 20 20 20 20 20 20 20 20 20 20 20

25 25 25 25 25 25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5

16 16 16 16 16 16 – – – – – –

20 20 20 20 20 20 20 20 20 20 20 20

25 25 25 25 25 25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5

40 40 40 40 40 40 – – – – – –

50 50 50 50 50 50 50 50 50 50 50 50

63 63 63 63 63 63 63 63 63 63 63 63

80 80 80 80 80 80 80 80 80 80 80 80

40...60

10...15

50...75

60...80

461 461 461 461 461 461 599 599 599 599 599 616

450 570 700 450 570 700 450 570 700 570 700 700

424 424 424 424 424 424 424 424 424 424 424 424

150 210 275 150 210 275 150 210 275 210 275 275

TN7405 TN7406 1VCD000051 TN7405 TN7406 1VCD000051 1VCD000050 TN7407 TN7408 TN7407 TN7408 TN7408

– 5 ... + 40

IEC 62271-100

CEI 17-1 (File 1375)

Ur [kV]

Us [kV]

Ud (1 min) [kV]

Up [kV]

fr [Hz]

(2) Ir [A]

Isc [kA]

Ik [kA]

Ip [kA]

[O-0.3s-CO-3min-CO]

[ms]

[ms]

[ms]

[ms]

H [mm]

L [mm]

P [mm]

I [mm]

[°C]

IEC: 60068-2-30

721-2-1

IEC: 60694, 61000-6-2

61000-6-4

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VD4 17

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50-60

630 630 630 1250 1250 1250 1600 1600 2000 2000 2500

16 16 16 16 16 16 – – – – –

20 20 20 20 20 20 20 20 20 20 20

25 25 25 25 25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5

16 16 16 16 16 16 – – – – –

20 20 20 20 20 20 20 20 20 20 20

25 25 25 25 25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5 31.5

40 40 40 40 40 40 – – – – –

50 50 50 50 50 50 50 50 50 50 50

63 63 63 63 63 63 63 63 63 63 63

80 80 80 80 80 80 80 80 80 80 80

40...60

10...15

50...75

60...80

461 461 461 461 461 461 599 599 599 599 616

450 570 700 450 570 700 570 700 570 700 700

424 424 424 424 424 424 424 424 424 424 424

150 210 275 150 210 275 210 275 210 275 275

TN7405 TN7406 1VCD000051 TN7405 TN7406 1VCD000051 TN7407 TN7408 TN7407 TN7408 TN7408

– 5 ... + 40

VD4 24

24

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125

50-60

630 630 1250 1250 1600 2000 2500

16 16 16 16 16 16 –

20 20 20 20 20 20 –

25 25 25 25 25 25 25

– – – – – – –

16 16 16 16 16 16 –

20 20 20 20 20 20 –

25 25 25 25 25 25 25

– – – – – – –

40 40 40 40 40 40 –

50 50 50 50 50 50 –

63 63 63 63 63 63

– – – – – – –

40...60

10...15

50...75

60...80

631 631 631 631 642 642 661

570 700 570 700 700 700 700

424 424 424 424 424 424 424

210 275 210 275 275 275 275

TN7409 TN7410 TN7409 TN7410 TN7411 TN7411 TN7411

– 5 ... + 40

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VD4 fixed circuit-breaker without bottom and top terminals

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Notes

H = Circuit-breakerheight.

L = Circuit-breaker width.D = Circuit-breaker depth.u/l = Distance between

bottom and top termi-nal.

l/g = Distance betweenbottom terminal andcircuit-breaker rest-ing surface.

I = Horizontal centre dis-tance between poles.

Types of fixed version circuit-breakers availableComplete the circuit-breaker selected with the optional accessories indicated on the following pages.

Ur Isc Rated normal current (40°C) [A]kV kA H = 461 H = 599 H = 616 H = 631 H = 642 H = 661 Circuit-breaker type

D = 424 D = 424 D = 424 D = 424 D = 424 D = 424u/l = 205 u/l = 310 u/l = 310 u/l = 310 u/l = 310 u/l = 310l/g = 217.5 l/g = 237.5 l/g = 237.5 l/g = 282.5 l/g = 282.5 l/g = 282.5

I = 150 I = 210 I = 210 I = 275 I = 275 I = 210 I = 275 I = 275 I = 275L = 450 L = 570 L = 570 L = 700 L = 700 L = 570 L = 700 L = 700 L = 700

16 630 VD4 12.06.16 p15020 630 VD4 12.06.20 p15025 630 VD4 12.06.25 p15031.5 630 VD4 12.06.32 p15016 1250 VD4 12.12.16 p15020 1250 VD4 12.12.20 p15025 1250 VD4 12.12.25 p15031.5 1250 VD4 12.12.32 p15020 1600 VD4 12.16.20 p15025 1600 VD4 12.16.25 p15031.5 1600 VD4 12.16.32 p15016 630 VD4 12.06.16 p21020 630 VD4 12.06.20 p21025 630 VD4 12.06.25 p21031.5 630 VD4 12.06.32 p21016 1250 VD4 12.12.16 p21020 1250 VD4 12.12.20 p21025 1250 VD4 12.12.25 p21031.5 1250 VD4 12.12.32 p21020 1600 VD4 12.16.20 p21025 1600 VD4 12.16.25 p21031.5 1600 VD4 12.16.32 p21020 2000 VD4 12.20.20 p21025 2000 VD4 12.20.25 p21031.5 2000 VD4 12.20.32 p21016 630 VD4 12.06.16 p27520 630 VD4 12.06.20 p27525 630 VD4 12.06.25 p27531.5 630 VD4 12.06.32 p27516 1250 VD4 12.12.16 p27520 1250 VD4 12.12.20 p27525 1250 VD4 12.12.25 p27531.5 1250 VD4 12.12.32 p27520 1600 VD4 12.16.20 p27525 1600 VD4 12.16.25 p27531.5 1600 VD4 12.16.32 p27520 2000 VD4 12.20.20 p27525 2000 VD4 12.20.25 p27531.5 2000 VD4 12.20.32 p27520 2500 VD4 12.25.20 p27525 2500 VD4 12.25.25 p27531.5 2500 VD4 12.25.32 p275

Standard fittings for fixed circuit-breaker seriesThe basic versions of the fixed circuit-breakers are three-pole and fitted with:– EL type manual operating mechanism– mechanical signalling device for closing springs charged/discharged– mechanical signalling device for circuit-breaker open/closed– closing pushbutton, opening pushbutton and operation counter– set of ten auxiliary circuit-breaker break/make contacts

Note: with the group of ten auxiliary contacts supplied as standard and themaximum number of electrical applications, three break contacts (signallingcircuit-breaker open) and five make contacts (signalling circuit-breaker closed)are available.

– lever for manually charging the closing springs– auxiliary circuit support terminal board.

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VD4 fixed circuit-breaker without bottom and top terminals

Ur Isc Rated normal current (40°C) [A]kV kA H = 461 H = 599 H = 616 H = 631 H = 642 H = 661 Circuit-breaker type

D = 424 D = 424 D = 424 D = 424 D = 424 D = 424u/l = 205 u/l = 310 u/l = 310 u/l = 310 u/l = 310 u/l = 310l/g = 217.5 l/g = 237.5 l/g = 237.5 l/g = 282.5 l/g = 282.5 l/g = 282.5

I = 150 I = 210 I = 210 I = 275 I = 275 I = 210 I = 275 I = 275 I = 275L = 450 L = 570 L = 570 L = 700 L = 700 L = 570 L = 700 L = 700 L = 700

16 630 VD4 17.06.16 p15020 630 VD4 17.06.20 p15025 630 VD4 17.06.25 p15031.5 630 VD4 17.06.32 p15016 1250 VD4 17.12.16 p15020 1250 VD4 17.12.20 p15025 1250 VD4 17.12.25 p15031.5 1250 VD4 17.12.32 p15016 630 VD4 17.06.16 p21020 630 VD4 17.06.20 p21025 630 VD4 17.06.25 p21031.5 630 VD4 17.06.32 p21016 1250 VD4 17.12.16 p21020 1250 VD4 17.12.20 p21025 1250 VD4 17.12.25 p21031.5 1250 VD4 17.12.32 p21020 1600 VD4 17.16.20 p21025 1600 VD4 17.16.25 p21031.5 1600 VD4 17.16.32 p21020 2000 VD4 17.20.20 p21025 2000 VD4 17.20.25 p21031.5 2000 VD4 17.20.32 p21016 630 VD4 17.06.16 p27520 630 VD4 17.06.20 p27525 630 VD4 17.06.25 p27531.5 630 VD4 17.06.32 p27516 1250 VD4 17.12.16 p27520 1250 VD4 17.12.20 p27525 1250 VD4 17.12.25 p27531.5 1250 VD4 17.12.32 p27520 1600 VD4 17.16.20 p27525 1600 VD4 17.16.25 p27531.5 1600 VD4 17.16.32 p27520 2000 VD4 17.20.20 p27525 2000 VD4 17.20.25 p27531.5 2000 VD4 17.20.32 p27520 2500 VD4 17.25.20 p27525 2500 VD4 17.25.25 p27531.5 2500 VD4 17.25.32 p275

16 630 VD4 24.06.16 p21020 630 VD4 24.06.20 p21025 630 VD4 24.06.25 p21016 1250 VD4 24.12.16 p21020 1250 VD4 24.12.20 p21025 1250 VD4 24.12.25 p21016 630 VD4 24.06.16 p27520 630 VD4 24.06.20 p27525 630 VD4 24.06.25 p27516 1250 VD4 24.12.16 p27520 1250 VD4 24.12.20 p27525 1250 VD4 24.12.25 p27516 1600 VD4 24.16.16 p27520 1600 VD4 24.16.20 p27525 1600 VD4 24.16.25 p27516 2000 VD4 24.20.16 p27520 2000 VD4 24.20.20 p27525 2000 VD4 24.20.25 p27525 2500 VD4 24.25.25 p275

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Notes

H = Circuit-breakerheight.

L = Circuit-breaker width.D = Circuit-breaker depth.u/l = Distance between

bottom and top termi-nal.

l/g = Distance betweenbottom terminal andcircuit-breaker rest-ing surface.


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General characteristics of withdrawablecircuit-breakers for UniGear type ZS1switchgear (12 - 17.5 - 24 kV)

(1) Rated uninterruptedcurrents guaranteedwith withdrawable cir-cuit-breaker installed inUniGear type ZS1switchgear with 40°C airtemperature

(2) The 2300 A rated nor-mal current is guaran-teed with natural venti-lation.The 2500 A rated nor-mal current is guaran-teed with forced venti-lation.

Circuit-breaker

Standards

Rated voltage




Rated frequency




circuit current)

Rated short-time


Making capacity

Operation sequence

Opening time

Arcing time

Total breaking time

Closing time



Standardized table of dimensions


Tropicalization


IEC 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-3min-CO]

[ms]

[ms]

[ms]

[ms]

H [mm]

L [mm]

P [mm]

I [mm]

[°C]

IEC: 60068-2-30

721-2-1

IEC: 60694, 61000-6-2

61000-6-4

H

I I

L P

VD4/P 12

12

12

28

75

50-60

630 1250 1600 1600 2000 2000 2500

16 16 – – – – –

20 20 20 20 20 20 20

25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5

16 16 – – – – –

20 20 20 20 20 20 20

25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5

40 40 – – – – –

50 50 50 50 50 50 50

63 63 63 63 63 63 63

80 80 80 80 80 80 80

40...60

10...15

50...75

60...80

632 632 690 690 690 690 690

503 503 653 853 653 853 853

664 664 642 642 642 642 642

150 150 210 275 210 275 275

TN7412 TN7412 TN7415 TN7416 TN7415 TN7416 TN7417

– 5 ... + 40

17

2

VD4/P 17

17.5

17.5

38

95

50-60

630 1250 1600 1600 2000 2000 2500

16 16 – – – – –

20 20 20 20 20 20 20

25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5

16 16 – – – – –

20 20 20 20 20 20 20

25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5

40 40 – – – – –

50 50 50 50 50 50 50

63 63 63 63 63 63 63

80 80 80 80 80 80 80

40...60

10...15

50...75

60...80

632 632 690 690 690 690 690

503 503 653 853 653 853 853

664 664 642 642 642 642 642

150 150 210 275 210 275 275

TN7412 TN7412 TN7415 TN7416 TN7415 TN7416 TN7417

– 5 ... + 40

VD4/P 24

24

24

50

125

50-60

630 630 1250 1250 1600 2000 2500 (2)

16 16 16 16 16 16 16

20 20 20 20 20 20 20

25 25 25 25 25 25 25

– – – – – – –

16 16 16 16 16 16 16

20 20 20 20 20 20 20

25 25 25 25 25 25 25

– – – – – – –

40 40 40 40 40 40 40

50 50 50 50 50 50 50

63 63 63 63 63 63 63

– – – – – – –

40...60

10...15

50...75

60...80

794 794 794 794 838 838 838

653 853 653 853 853 853 853

802 802 802 802 790 790 790

210 275 210 275 275 275 275

TN7413 TN7414 TN7413 TN7414 TN7418 TN7418 TN7418

– 5 ... + 40

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12

17.5

Ur Isc Rated normal current (40°C) [A] (*)

kV kA L = 650 L = 800 L = 1000 L = 1000 L = 800 L = 1000 L = 1000 Circuit-breaker typeI = 150 I = 210 I = 275 I = 275 I = 210 I = 275 I = 275u/l = 205 u/l = 310 u/l = 310 u/l = 310 u/l = 310 u/l = 310 u/l = 310ø = 35 ø = 79 ø = 79 ø = 109 ø = 35 ø = 35 ø = 79

16 630 VD4/P 12.06.16 p15020 630 VD4/P 12.06.20 p15025 630 VD4/P 12.06.25 p15031.5 630 VD4/P 12.06.32 p15016 1000 VD4/P 12.12.16 p15020 1000 VD4/P 12.12.20 p15025 1000 VD4/P 12.12.25 p15031.5 1000 VD4/P 12.12.32 p15016 1250 VD4/P 12.12.16 p15020 1250 VD4/P 12.12.20 p15025 1250 VD4/P 12.12.25 p15031.5 1250 VD4/P 12.12.32 p15020 1600 VD4/P 12.16.20 p21025 1600 VD4/P 12.16.25 p21031.5 1600 VD4/P 12.16.32 p21020 2000 VD4/P 12.20.20 p21025 2000 VD4/P 12.20.25 p21031.5 2000 VD4/P 12.20.32 p21020 1600 VD4/P 12.16.20 p27525 1600 VD4/P 12.16.25 p27531.5 1600 VD4/P 12.16.32 p27520 2000 VD4/P 12.20.20 p27525 2000 VD4/P 12.20.25 p27531.5 2000 VD4/P 12.20.32 p27520 2500 VD4/P 12.25.20 p27525 2500 VD4/P 12.25.25 p27531.5 2500 VD4/P 12.25.32 p275

16 630 VD4/P 17.06.16 p15020 630 VD4/P 17.06.20 p15025 630 VD4/P 17.06.25 p15031.5 630 VD4/P 17.06.32 p15016 1000 VD4/P 17.12.16 p15020 1000 VD4/P 17.12.20 p15025 1000 VD4/P 17.12.25 p15031.5 1000 VD4/P 17.12.32 p15016 1250 VD4/P 17.12.16 p15020 1250 VD4/P 17.12.20 p15025 1250 VD4/P 17.12.25 p15031.5 1250 VD4/P 17.12.32 p15020 1600 VD4/P 17.16.20 p21025 1600 VD4/P 17.16.25 p21031.5 1600 VD4/P 17.16.32 p21020 2000 VD4/P 17.20.20 p21025 2000 VD4/P 17.20.25 p21031.5 2000 VD4/P 17.20.32 p21020 1600 VD4/P 17.16.20 p27525 1600 VD4/P 17.16.25 p27531.5 1600 VD4/P 17.16.32 p27520 2000 VD4/P 17.20.20 p27525 2000 VD4/P 17.20.25 p27531.5 2000 VD4/P 17.20.32 p27520 2500 VD4/P 17.25.20 p27525 2500 VD4/P 17.25.25 p27531.5 2500 VD4/P 17.25.32 p275

VD4/P withdrawable circuit-breaker for UniGear type ZS1 switchgear

Types of widrawable version circuit-breakers available for UniGear type ZS1 switchgearComplete the circuit-breaker selected with the optional accessories indicated on the following pages.

Notes

L = Width of the switch-gear.


u/l = Distance betweenbottom and top termi-nal.

Ø = Diameter of isolatingcontact.

19

2

24

Ur Isc Rated normal current (40°C) [A] (*)

kV kA L = 650 L = 800 L = 1000 L = 1000 L = 800 L = 1000 L = 1000 Circuit-breaker typeI = 150 I = 210 I = 275 I = 275 I = 210 I = 275 I = 275u/l = 205 u/l = 310 u/l = 310 u/l = 310 u/l = 310 u/l = 310 u/l = 310ø = 35 ø = 79 ø = 79 ø = 109 ø = 35 ø = 35 ø = 79

16 630 VD4/P 24.06.16 p21020 630 VD4/P 24.06.20 p21025 630 VD4/P 24.06.25 p21016 1000 VD4/P 24.12.16 p21020 1000 VD4/P 24.12.20 p21025 1000 VD4/P 24.12.25 p21016 1250 VD4/P 24.12.16 p21020 1250 VD4/P 24.12.20 p21025 1250 VD4/P 24.12.25 p21016 630 VD4/P 24.06.16 p27520 630 VD4/P 24.06.20 p27525 630 VD4/P 24.06.25 p27516 1000 VD4/P 24.12.16 p27520 1000 VD4/P 24.12.20 p27525 1000 VD4/P 24.12.25 p27516 1250 VD4/P 24.12.16 p27520 1250 VD4/P 24.12.20 p27525 1250 VD4/P 24.12.25 p27516 1600 VD4/P 24.16.16 p27520 1600 VD4/P 24.16.20 p27525 1600 VD4/P 24.16.25 p27516 2000 VD4/P 24.20.16 p27520 2000 VD4/P 24.20.20 p27525 2000 VD4/P 24.20.25 p27516 2300 VD4/P 24.25.16 p27520 2300 VD4/P 24.25.20 p27525 2300 VD4/P 24.25.25 p27516 2500 VD4/P 24.25.16 p27520 2500 VD4/P 24.25.20 p27525 2500 VD4/P 24.25.25 p275

VD4/P withdrawable circuit-breaker for UniGear type ZS1 switchgear

Notes





(*) The 2300 A rated nor-mal current is guaran-teed with natural ventila-tion.The 2500 A rated nor-mal current is guaran-teed with forced ventila-tion.

Standard fittings of withdrawable circuit-breakers for UniGear ZS1type switchgearThe basic versions of the withdrawable circuit-breakers are three-pole andfitted with:– EL type manual operating mechanism– mechanical signalling device for closing springs charged/discharged– mechanical signalling device for circuit-breaker open/closed– closing pushbutton– opening pushbutton– operation counter– set of ten circuit-breaker open/closed auxiliary contacts

Note: with the group of ten auxiliary contacts supplied as standard and themaximum number of electrical applications, three break contacts (signalling circuit-breaker open) and four make contacts (signalling circuit-breaker closed) areavailable.

– lever for manually charging the closing springs– isolating contacts– cord with connector (plug only) for auxiliary circuits, with striker pin which

does not allow the plug to be inserted into the socket if the rated current ofthe circuit-breaker is different from the rated current of the panel

– racking-in/out lever (the quantity must be defined according to the numberof pieces of apparatus ordered)

– locking electromagnet in the truck. This prevents the circuit-breaker beingracked into the panel with the auxiliary circuits disconnected (plug notinserted in the socket).

20


General characteristicsof withdrawable circuit-breakersfor Unisafe switchgear (12 - 17.5 - 24 kV)

(1) Rated normal currentsguaranteed withwithdrawable circuit-breaker installed inUniSafe switchgearwith 40°C airtemperature.

(2) TN7420 - VD4/W typecircuit-breaker.

Circuit-breaker

Standards

Rated voltage




Rated frequency




circuit current)

Rated short-time


Making capacity

Operation sequence

Opening time

Arcing time

Total breaking time

Closing time



Dimension standardized table


Tropicalization


VD4/P 12

12

12

28

75

50-60

630 1250 630 1250 1600 2000 2500

16 16 16 16 – – –

20 20 20 20 20 20 20

25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5

16 16 16 16 – – –

20 20 20 20 20 20 20

25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5

40 40 40 40 – – –

50 50 50 50 50 50 50

63 63 63 63 63 63 63

80 80 80 80 80 80 80

~ 45

10-15

55-60

~ 80

632 632 632 632 690 690 690

503 503 503 503 653 653 853

664 664 664 664 642 642 642

150 150 210 210 210 210 275

TN7412 TN7412 (2) (2) TN7415 TN7415 TN7417

– 5 ... + 40

IEC 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-3min-CO]

[ms]

[ms]

[ms]

[ms]

H [mm]

L [mm]

P [mm]

I [mm]

[°C]

IEC: 60068-2-30

721-2-1

IEC: 60694, 61000-6-2

61000-6-4

H

I I

L P

21

2

VD4/P 17

17.5

17.5

38

95

50-60

630 1250 630 1250 1600 2000 2500

16 16 16 16 – – –

20 20 20 20 20 20 20

25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5

16 16 16 16 – – –

20 20 20 20 20 20 20

25 25 25 25 25 25 25

31.5 31.5 31.5 31.5 31.5 31.5 31.5

40 40 40 40 – – –

50 50 50 50 50 50 50

63 63 63 63 63 63 63

80 80 80 80 80 80 80

~ 45

10-15

55-60

~ 80

632 632 632 632 690 690 690

503 503 503 503 653 653 853

664 664 664 664 642 642 642

150 150 210 210 210 210 275

TN7412 TN7412 (2) (2) TN7415 TN7415 TN7417

– 5 ... + 40

VD4/P 24

24

24

50

125

50-60

630 1250 1600 2000

16 16 16 16

20 20 20 20

25 25 25 25

– – – –

16 16 16 16

20 20 20 20

25 25 25 25

– – – –

40 40 40 40

50 50 50 50

63 63 63 63

– – – –

~ 45

10-15

55-60

~ 80

794 794 853 853

653 653 853 853

802 802 790 790

210 210 275 275

TN7413 TN7413 TN7418 TN7418

– 5 ... + 40

22

12

Types of widrawable version circuit-breakers available for UniSafe switchgearComplete the circuit-breaker selected with the optional accessories indicated on the following pages.

17.5

VD4/P withdrawable circuit-breaker for UniSafe switchgear

Ur Isc Rated normal current (40°C) [A]

kV kA L = 600 L = 750 L = 750 L = 1000 L = 750 L = 1000 Circuit-breaker typeI = 150 I = 210 I = 210 I = 275 I = 210 I = 275u/l = 205 u/l = 310 u/l = 310 u/l = 310 u/l = 310 u/l = 310ø = 35 ø = 35 (1) ø = 79 ø = 109 ø = 35 ø = 79

16 630 VD4/P 12.06.16 p15020 630 VD4/P 12.06.20 p15025 630 VD4/P 12.06.25 p15031.5 630 VD4/P 12.06.32 p15016 1250 VD4/P 12.12.16 p15020 1250 VD4/P 12.12.20 p15025 1250 VD4/P 12.12.25 p15031.5 1250 VD4/P 12.12.32 p15016 630 VD4/P 12.06.16 p21020 630 VD4/P 12.06.20 p21025 630 VD4/P 12.06.25 p21031.5 630 VD4/P 12.06.32 p21016 1250 VD4/P 12.12.16 p21020 1250 VD4/P 12.12.20 p21025 1250 VD4/P 12.12.25 p21031.5 1250 VD4/P 12.12.32 p21020 1600 VD4/P 12.16.20 p21025 1600 VD4/P 12.16.25 p21031.5 1600 VD4/P 12.16.32 p21020 2000 VD4/P 12.20.20 p21025 2000 VD4/P 12.20.25 p21031.5 2000 VD4/P 12.20.32 p21020 2500 VD4/P 12.25.20 p27525 2500 VD4/P 12.25.25 p27531.5 2500 VD4/P 12.25.32 p275

16 630 VD4/P 17.06.16 p15020 630 VD4/P 17.06.20 p15025 630 VD4/P 17.06.25 p15031.5 630 VD4/P 17.06.32 p15016 1250 VD4/P 17.12.16 p15020 1250 VD4/P 17.12.20 p15025 1250 VD4/P 17.12.25 p15031.5 1250 VD4/P 17.12.32 p15016 630 VD4/P 17.06.16 p21020 630 VD4/P 17.06.20 p21025 630 VD4/P 17.06.25 p21031.5 630 VD4/P 17.06.32 p21016 1250 VD4/P 17.12.16 p21020 1250 VD4/P 17.12.20 p21025 1250 VD4/P 17.12.25 p21031.5 1250 VD4/P 17.12.32 p21020 1600 VD4/P 17.16.20 p21025 1600 VD4/P 17.16.25 p21031.5 1600 VD4/P 17.16.32 p21020 2000 VD4/P 17.20.20 p21025 2000 VD4/P 17.20.25 p21031.5 2000 VD4/P 17.20.32 p21020 2500 VD4/P 17.25.20 p27525 2500 VD4/P 17.25.25 p27531.5 2500 VD4/P 17.25.32 p275


Notes





23

22

24

Ur Isc Rated normal current (40°C) [A]

kV kA L = 600 L = 750 L = 750 L = 1000 L = 750 L = 1000 Circuit-breaker typeI = 150 I = 210 I = 210 I = 275 I = 210 I = 275u/l = 205 u/l = 310 u/l = 310 u/l = 310 u/l = 310 u/l = 310ø = 35 ø = 35 (1) ø = 79 ø = 109 ø = 35 ø = 79

16 630 VD4/P 24.06.16 p21020 630 VD4/P 24.06.20 p21025 630 VD4/P 24.06.25 p21016 1250 VD4/P 24.12.16 p21020 1250 VD4/P 24.12.20 p21025 1250 VD4/P 24.12.25 p21016 1600 VD4/P 24.16.16 p27520 1600 VD4/P 24.16.20 p27525 1600 VD4/P 24.16.25 p27516 2000 VD4/P 24.20.16 p27520 2000 VD4/P 24.20.20 p27525 2000 VD4/P 24.20.25 p275

VD4/P withdrawable circuit-breaker for UniSafe switchgear

Notes





Standard fittings of withdrawable circuit-breakers for UniSafe switchgearThe basic versions of the withdrawable circuit-breakers are always three-pole and fitted with:– EL type manual operating mechanism– mechanical signalling device for closing

springs charged/discharged– mechanical signalling device for circuit-breaker

open/closed– closing pushbutton– opening pushbutton– operation counter– set of ten circuit-breaker open/closed auxiliary

contactsNote: with the group of ten auxiliary contactssupplied as standard and the maximum number ofelectrical applications, three break contacts(signalling circuit-breaker open) and four makecontacts (signalling circuit-breaker closed) areavailable.

– lever for manually charging the closing springs– isolating contacts– cord with connector (plug only) for auxiliary

circuits, with striker pin which does not allowthe plug to be inserted into the socket if therated current of the circuit-breaker is differentfrom the rated current of the panel

– racking-in/out lever (the quantity must bedefined according to the number of pieces ofapparatus ordered)

– locking electromagnet in the truck. Thisprevents the circuit-breaker being racked intothe panel with the auxiliary circuitsdisconnected (plug not inserted in the socket).

24

2A


Optional accessoriesThe accessories identified with the same number are alternative to each other.

1 Shunt opening release (-M01)

This allows remote opening control of the apparatus.The release can operate both in direct and alternating current.This release is suitable for instantaneous service. In this case, the minimumcurrent impulse time must be 100 ms.

CharacteristicsUn: 124 V–

Un: 130 - 48 - 60 - 110 - 120 - 120 - 127 - 220 - 240 - 250 - 380 - 400 - 440 V– / V ~

Un: 480 V ~

Operating limits: 70 … 110 % Un

Power on inrush (Ps): DC 200 W; AC = 200 VA

Inrush duration: approx. 100 ms

Maintenance power (Pc): DC = 5 W; AC = 5 VA

Opening time: max 60 ms

Insulation voltage: 2500 V 50 Hz (per 1 min)

2 Additional shunt opening release (-M02)

Like the shunt opening release described above, this allows remote openingcontrol of the apparatus and can be supplied by a circuit completely separatefrom the -MO1 release.It keeps all the electrical and operating characteristics of the shunt openingrelease.

3 Opening solenoid (-MO3)

The opening solenoid is a special release with demagnetisation, located inthe operating mechanism (in the left-hand side of the operatingmechanism).The opening solenoid (-MO3) is not alternative to the additional shuntopening release (-MO2).

4 Shunt closing release (-MC)

This allows remote closing control of the apparatus.The release can operate both in direct and alternating current.This release is suitable both for instantaneous and permanent service.In the case of instantaneous service, the minimum current impulse time mustbe 100 ms. The permanently supplied release carries out the electrical anti-pumping function.It keeps all the electrical and operating characteristics of the shunt openingrelease.

25

2

5 Undervoltage release (-MU)

The undervoltage release opens the circuit-breaker when there is notablelowering or lack of its power supply. It can be used for remote release (bymeans of normally closed type push-buttons), lock on closing or to control thevoltage in the auxiliary circuits.The circuit-breaker can only close with the release supplied (the closure lock ismade mechanically).The release can operate both in direct and alternating current.The undervoltage release is available in the following versions:

5A Undervoltage release with power supply branched on the supply side.

5B Undervoltage release with electronic time delay device (0.5 - 1 - 1.5 - 2 -3s) (power supply branched on the supply side). This device is set at 0.5s(for adjustment, please see the Electric Circuit Diagram chapter).

CharacteristicsUn: 24 - 30 - 48 - 60 - 110 - 125 - 220 - 250 V–

Un: 24 - 48 - 60 - 110 - 120 - 127 - 220...240 V ~ 50 Hz

Un: 110 - 120...127 - 220...240 V ~ 60 Hz

Operating limits: – circuit-breaker opening: 35-70% Un– circuit-breaker closing: 85-110% Un


Inrush duration about 100 ms

Continuous power (Pc): DC = 5 W; AC = 5 VA

Opening time: 30 ms

Insulation voltage: 2500 V 50 Hz (for 1 min)

Electronic time delay device (-KT)

The electronic time delay device must be mounted externally in relation to thecircuit-breaker. It allows release trip with established and adjustable times.The use of the undervoltage release is recommended in order to prevent tripswhen the power supply network of the release may be subject to cuts orvoltage drops of short duration.If it is not supplied, circuit-breaker closing is disabled.The time delay device must be combined with an undervoltage release withthe same voltage as the delay device.

Characteristics of the time-delay deviceUn: 24...30 - 48 - 60 - 110...127 - 220...250 V–

Un: 48 - 60 - 110...127 - 220...240 - V ~ 50/60 Hz

Adjustable opening time (release + time delay device): 0.5-1-1.5-2-3 sec

26

5


6 Undervoltage release mechanical override

This is a mechanical device which allows the undervoltage release trip to betemporarily excluded.It is always fitted with electrical signalling.

7 Contact for signalling undervoltage energised/de-energised (-BB5)

The undervoltage releases can be fitted with a contact (normally closed oropen as desired) for signalling whether the undervoltage release is ener-gised or de-energised, and for remote signalling of the release state.The contact provides the following indication:– contact open: release energised– contact closed: release de-energised.

8 Circuit-breaker auxiliary contacts (-BB1; -BB2; -BB3)

Electrical signalling of circuit-breaker open/closed can be provided with a setof 15 auxiliary contacts as an alternative to the 10 provided as standard.

NoteWith the group of ten auxiliary contacts supplied as standard and the maximumnumber of electrical applications, three break contacts (signalling circuit-breakeropen) and five make contacts (signalling circuit-breaker closed) are available.With the group of 15 auxiliary contacts, according to the electrical applicationsrequired, the following are available:– for fixed circuit-breakers: thirteen auxiliary contacts, differently divided between break

contacts and make contacts according to the figure selected of the electrical diagram;– for withdrawable circuit-breakers, since the plug plug-socket of the auxiliary circuits

has a limited number of poles: five break contacts (signalling circuit-breaker open) andfive make contacts (signalling circuit-breaker closed).

CharacteristicsUn: 24 ... 250 V AC-DC

Rated current Ith2 = 10 A

Insulation voltage: 2500 V 50 Hz (for 1 min)

Electric resistance: 3 mOhm

Rated current and breaking capacity in category AC11 and DC11:

Un Cos � T In Icu

220 V ~ 0.7 -- 2.5 A 25 A

24 V – -- 15 ms 10 A 12 A

60 V – -- 15 ms 6 A 8 A

110 V – -- 15 ms 4 A 5 A

220 V – -- 15 ms 1 A 2 A

27

2

9

10

12 Motor operator (-MS)

This carries out automatic charging of the circuit-breaker operating mecha-nism closing springs. After circuit-breaker closing, the geared motor immedi-ately recharges the closing springs.In the case of a power cut or during maintenance work, the closing springscan be charged manually in any case (by means of the special crank handleincorporated in the operating mechanism).

CharacteristicsUn: 24...30 - 48...60 - 110...130 - 220...250 V–

Un: 100...130 - 220...250 V ~ 50/60 Hz



Rated power (Pn): DC = 200 W; AC = 200 VA

Inrush duration: 0,2 s

Charging time: 4-5 s

Insulating voltage: 2500 V 50 Hz (for 1 min)

9 Contatto transitorio (-BB4)

Transient contact with momentary closing during circuit-breaker opening.

10 Position contact (-BT3)

The position contact (-BT3) is used, together with the locking magnet of theoperating mechanism (-RL1) to prevent remote closing of the circuit-breakerduring traverse into the unit. It is only supplied for the withdrawable versioncircuit-breakers for UniGear ZS1 and UniSafe type switchgear.In the UniGear ZS1 type switchgear, it is not supplied when the transmittedcontacts in the truck are required (-BT1; -BT2).

11 Transmitted contacts in the truck (-BT1; -BT2)

Transmitted contacts of the withdrawable circuit-breaker (installed in thecircuit-breaker truck - only for VD4/P withdrawable circuit-breaker).These contacts are either in addition or as an alternative to the positioncontacts (for signalling circuit-breaker racked out) located in the unit. Theyalso carry out the function of the position contact (-BT3).

28

17


Protections and locks (kit 14 ... 20)

Various mechanical and electromechanical locking and protection devices are available.

17 Locking magnet on the operating mechanism (-RL1)

This only allows activation of the operating mechanism when the lockingmagnet is energized.

CharacteristicsUn: 24 - 30 - 48 - 60 - 110 - 132 - 220 - 250 V–

Un: 48 - 60 - 110 - 120...127 - 220...240 V~ 50/60 Hz



Continuous power (Pc): DC = 5 W; AC = 5 VA

Inrush duration: 150 ms

13 Contact for signalling closing springs charged/discharged (-BS2)

It consists of a microswitch which allows remote signalling of the state of thecircuit-breaker operating mechanism springs.The contact is available in one of the two following versions (alternatively):– contact open: signalling springs charged– contact closed: signalling springs discharged.

14 Opening and closing pushbutton protection

The protection only allows the opening and closing pushbuttons to beoperated using a special tool.

15 Opening and closing pushbutton padlocks

The device allows the opening and closing pushbuttons to be locked using amaximum of three padlocks (not supplied): ø 4 mm.

16 Key lock in open position

The lock is activated by a special circular lock.Different keys (for a single circuit-breaker) are available, or the same keys(for several circuit-breakers).

29

2

18

18 Locking magnet on the truck (-RL2)

Compulsory accessory for the withdrawable versions for UniSafe and UniGear ZS1 typeswitchgear, to prevent circuit-breaker racking into the switchgear with the auxiliary circuitplug disconnected.The plug realises the anti racking-in lock for different rated current (by means of specialpins).

CharacteristicsUn: 24 - 30 - 48 - 60 - 110 - 125 - 127 - 132 - 220 - 240 V–

Un: 24 - 30 - 48 - 60 - 110 - 125 - 127 - 220 - 230...240 V~ 50/60 Hz



Continuous power (Pc) DC = 5 W; AC = 5 VA

Inrush duration: 150 ms

19 Interlock for fixed circuit-breaker

Device for fixed circuit-breakers which are converted into withdrawableones by the customer. It allows a mechanical lock to be made, by thecustomer, which prevents racking-out/in with the circuit-breaker closed.

20 Mechanical interlock

This device prevents the switchgear door being opened with the circuit-breaker racked-in. Only provided for circuit-breakers used in UniSafeswitchgear, fitted with special striker on the switchgear.

21 Motorised truck (-MT) (only for withdrawable version circuit-breakersfor UniGear ZS1 type switchgear)

This allows remote racking in and out of the circuit-breaker in theswitchgear.Note: for VD4/P 24 kV circuit-breakers, this accessory is only available for the 630 A -1250 A types with 210 mm horizontal pole centre distance.

CharacteristicsUn: 110 - 220 V–


Nominal power (Pn): 40 W

30

2

22 Monitoring device of the functionality and continuity of the shuntopening/closing releases (Shunt Test Unit)

This device can be used combined with the shunt opening release (-MO1; -MO2) or with the shunt closing release (-MC) to check their functionalityand continuity.The control/monitoring Shunt Test Unit allows the continuity of releases witha rated operating voltage between 24 V and 250 V (a.c. and d.c.) to bechecked, as well as the functionality of the electronic circuit of the release.The continuity check is carried out with a cycle of 20 seconds between onetest and the next.The unit has optical signals by means of LEDs on the front. In particular, thefollowing information is given:– POWER ON: power supply present– YO TESTING: test being carried out– TEST FAILED: indication after a failed test or lack of auxiliary power

supply– ALARM: indication after three failed tests.Two relays and a changeover device are available on board the unit, whichallow remote indication of the two events:– failure of a test (resetting takes place automatically when the alarm is over)– failure of three tests (resetting only takes place by means of manual -

RESET - from the front of the unit).A manual RESET push-buttonis located on the front.

CharacteristicsUn: 24 ... 250 V AC/DC

Maximum interrupted current: 6 A

Maximum interrupted voltage: 250 V AC


31

3

Resistance to vibrations 32

Tropicalization 32

Altitude 32

Anti-pumping device 33

Environmental protection programme 33

PR512 protection device 33

Spare parts 34


32

Ka = e m (H – 1000)/8150

(IEC 60071-2)

Resistance to vibrationsVD4 circuit-breakers are unaffected by mechani-cally generated vibrations.For the versions approved by the naval registers,please contact us.

TropicalizationVD4 circuit-breakers are manufactured in compli-ance with the strictest regulations for use in hot-humid-saline climates.All the most important metal components aretreated against corrosive factors according toUNI 3564-65 Standards environmental class C.Galvanisation is carried out in accordance withUNI ISO 2081 Standards, classification codeFe/Zn 12, with a thickness of 12x10-6 m, protectedby a conversion layer mainly consisting ofchromates in compliance with the UNI ISO 4520Standards.These construction characteristics mean that thewhole VD4 series of circuit-breakers and its ac-cessories comply with climate graph 8 of the IEC60721-2-1 and IEC 60068-2-2 (Test B: Dry Heat /IEC 60068-2-30 (Test Bd: Damp Heat, cyclic)Standards.

AltitudeThe insulating property of air decreases as thealtitude increases, therefore this must alwaysbe taken into account for external insulation ofthe apparatus (the internal insulation of the inter-rupters do not undergo any variations as it isguaranteed by vacuum).The phenomenon must always be taken into con-sideration during the design stage of the insulat-ing components of apparatus to be installed over1000 m above sea level. In this case a correctioncoefficient must be considered, which can betaken from the graph to the side, built up on thebasis of the indications in the IEC 60694 Stand-ards.The following example is a clear interpretation ofthe indications given above.

Graph for determining the Ka correction factoraccording to the altitude

H = altitude in metres;m = value referred to industrial frequency and the

atmospheric impulse withstand voltages and thosebetween phase and phase.


Example• Installation altitude 2000 m• Operation at the rated voltage of 12 kV• Withstand voltage at industrial frequency 28 kV

rms• Impulse withstand voltage 75 kVp• Factor Ka obtained from graph = 1.13.

Considering the above parameters, the apparatuswill have to withstand the following values (undertest and at zero altitude, i.e. at sea level):

– withstand voltage at industrial frequency equalto:

28 x 1.13 = 31.6 kVrms

– impulse withstand voltage equal to:

75 x 1.13 = 84.7 kVp.

From the above, it can be deduced that for instal-lations at an altitude of 2000 m above sea level,with 12 kV service voltage, apparatus must beprovided with 17.5 kV rated voltage, character-ised by insulation levels at industrial frequency of38 kVrms with 95 kVp impulse withstand voltage.

33

3

Environmental protection programmeVD4 circuit-breakers are manufactured in accord-ance with the ISO 14000 Standards (Guidelinesfor environmental management).The production processes are carried out in com-pliance with the Standards for environmental pro-tection in terms of reduction in energy consump-tion as well as in raw materials and production ofwaste materials. All this is thanks to the mediumvoltage apparatus manufacturing facility environ-mental management system.Assessment of the environmental impact of thelife cycle 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 ofthe materials, processes and packing.This is to allow maximum recycling at the end ofthe useful life cycle of the apparatus.

Anti-pumping deviceThe EL operating mechanism of VD4 circuit-breakers (in all versions) is fitted with a mechanicalanti-pumping device which prevents re-closing dueto either electrical or mechanical commands.Should both the closing control and any one of theopening controls (local or remote) be active at thesame time, there would be a continuous successionof opening and closing controls.The anti-pumping device avoids this situation,ensuring that each closing operation is only followedby an opening operation and that there is no closingoperation after this. To obtain a further closingoperation, the closing control must be released andthen re-launched.Furthermore, the anti-pumping device only allowscircuit-breaker closure if the following conditionsare present at the same time:– operating mechanism springs fully charged– opening pushbutton and/or shunt opening release

(-M01/-M02) not activated– circuit-breaker open.

PR512 protection deviceThe self-supplied PR512 is available forprotection of the installations.Depending on the version, the PR512 carries outthe following functions:• 50-51-50N-51N protection• current measurement with display of the maxi-

mum value between phases• dialogue.For further informationabout the PR512,please consulttechnical catalogue1VCP000055.

34

3SPECIFIC PRODUCT CHARACTERISTICS

Spare parts– Shunt opening release– Additional shunt opening release– Undervoltage release– Contact for signalling undervoltage release energised/de-energised– Time delay device for undervoltage release– Mechanical override for undervoltage release– Shunt closing release– Spring charging geared motor with electrical signalling of springs charged– Contact signalling geared motor protection circuit-breaker open/closed– Contact signalling closing springs charged/discharged– Transient contact with momentary closing during circuit-breaker opening– Circuit-breaker auxiliary contacts– Locking electromagnet on the operating mechanism– Position contact of the withdrawable truck– Contacts signalling connected/isolated– Opening solenoid– Key lock in open position– Isolation interlock with the door– Protection for opening pushbutton– Protection for closing pushbutton– Locking electromagnet on the withdrawable truck– Set of six isolating contacts.

Ordering

For availability and to order spare parts, please contact our Servicedepartment, specifying the circuit-breaker serial number.

35

4OVERALL DIMENSIONS

Fixed circuit-breakers 36

Withdrawable circuit-breakers for UniGear type ZS1and UniSafe switchgear 41

36

A

A

(*) (*)

(*) (*)

Fixed circuit-breakers

OVERALL DIMENSIONS

(*) Interchangeability offixing points withprevious series(345 x 400).


VD4TN 7405 (M5234)Ur 12 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA31.5 kA

VD4TN 7405Ur 17,5 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA31.5 kA

VD4TN 7406 (M5234)Ur 12 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA31.5 kA

VD4TN 7406Ur 17,5 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA31.5 kA

37

4

A

A



VD41VCD000051 (E0073)Ur 12 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA31,5 kA

VD41VCD000051 (E0073)Ur 17,5 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA31,5 kA

VD41VCD000050 (E0117)Ur 12 kVIr 1600 AIsc 20 kA

25 kA31,5 kA

38

A

A

(*) (*)

(*) (*)

OVERALL DIMENSIONS




VD4TN 7407 (M5234)Ur 12 kVIr 1600 A

2000 AIsc 20 kA

25 kA31.5 kA

VD4TN 7407 (M5234)Ur 17.5 kVIr 1600 A

2000 AIsc 20 kA

25 kA31.5 kA

VD4TN 7408 (M5234)Ur 12 kVIr 1600 A

2000 A2500 A

Isc 20 kA25 kA31.5 kA

VD4TN 7408 (M5234)Ur 17.5 kVIr 1600 A

2000 A2500 A

Isc 20 kA25 kA31.5 kA

39

4

A

A

(*) (*)

(*) (*)



VD4TN 7409 (M5234)Ur 24 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA

VD4TN 7410 (M5234)Ur 24 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA

40

A

(*) (*)


OVERALL DIMENSIONS


VD4TN 7411 (M5234)Ur 24 kVIr 1600 A

2000 AIsc 16 kA

20 kA25 kA

VD4TN 7411 (M5234)Ur 24 kVIr 2500 AIsc 25 kA

41

4

(1) Only for UniSafeswitchgear .

Withdrawable circuit-breakers for UniGear type ZS1 and UniSafe switchgear

VD4/PTN 7412 (E0105)Ur 12 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA31.5 kA

VD4/PTN 7412 (E0105)Ur 17.5 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA31.5 kA

VD4/W (1)TN 7420 (E0068)Ur 12 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA31,5 kA

VD4/W (1)TN 7420 (E0068)Ur 17,5 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA31,5 kA

42


OVERALL DIMENSIONS

(1) Only for UniGearZS1 type switchgear.

VD4/PTN 7415 (E0105)Ur 12 kVIr 1600 A

2000 AIsc 20 kA

25 kA31.5 kA

VD4/PTN 7415 (E0105)Ur 17.5 kVIr 1600 A

2000 AIsc 20 kA

25 kA31.5 kA

VD4/P (1)TN 7416 (E0117)Ur 12 kVIr 1600 A

2000 AIsc 20 kA

25 kA31.5 kA

VD4/P (1)TN 7416 (E0117)Ur 17.5 kVIr 1600 A

2000 AIsc 20 kA

25 kA31.5 kA

.

43

4

VD4/PTN 7413 (E0105)Ur 24 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA

VD4/PTN 7417 (E0117)Ur 17.5 kVIr 2500 AIsc 20 kA

25 kA31.5 kA

44

VD4/P (1)TN 7414 (EO105)Ur 24 kVIr 630 A

1250 AIsc 16 kA

20 kA25 kA

VD4/PTN 7418 (E0105)Ur 24 kVIr 1600 A

2000 A2500 A (2)

Isc 16 kA20 kA25 kA

4

(1) Only for UniGearZS1 type switchgear.


OVERALL DIMENSIONS

(2) Only for UniGearZS1 type switchgear.Rated normal cur-rent of 2300 A is guar-anteed with naturalventilation.Rated normal cur-rent of 2500 A is guar-anteed with forcedventilation.

45

5

Application diagrams 46

Represented operational state 49

Caption 49

Diagram figures description 49

Incompatibility 50

Notes 50

Graphical symbols for electrical diagrams 51


46


Diagrams of theapplications

The following diagram(No. 1VCD400047)shows the withdrawablecircuit-breaker circuits upto 24 kV type VD4/P andVD4/W with manual iso-lation, delivered to thecustomer by means of the“-XB” connector.For VD4/P withdrawablecircuit-breakers with mo-torised isolation, the spe-cific 1VCD400048 dia-gram is available.For fixed circuit-break-ers, the specific1VCD400046 diagram isavailableIn any case, to take intoaccount product devel-opment, it is always use-ful to refer to the circuitdiagram suppliedwith each circuit-breaker.

48


49

5

-RL2 = Locking magnet. When de-energised itmechanically prevents circuit-breakerconnection and isolation. It is possible tolimit consumption by connecting adelayed pushbutton in series to enablethe operation

-MC = Shunt closing release (see note D)-MO1 = First shunt opening release (see note D)-MO2 = Second shunt opening release (see

note D)-MO3 = Opening solenoid for release outside

the circuit-breaker-MU = Undervoltage release (see note B).

Description of figuresFig. 1 = Closing spring charging motor circuit

(see note C)Fig. 2 = Shunt closing release (anti-pumping is

carried out mechanically)Fig. 3 = Locking magnet. When de-energised it

mechanically prevents circuit-breakerclosing. If -RL1 is required, providethis figure when fig. 31 or 32 isselected. It is possible to limitconsumption by connecting a delayedpushbutton in series to enable theoperation

Fig. 4 = Locking magnet. When de-energised itmechanically prevents circuit-breakerclosing. If -RL1 is required, providethis figure when fig. 33 or 34 isselected. It is possible to limitconsumption by connecting a delayedpushbutton in series to enable theoperation

Fig. 5 = Instantaneous undervoltage release orwith time-delay device (see note B).

Fig. 7 = First shunt opening release circuit withpossibility of continuous control of thewinding (see note D).

Fig. 8 = Locking magnet. When de-energised itmechanically prevents circuit-breakerclosing (it is possible to limitconsumption by connecting a delayedpushbutton in series to enable theoperation)

State of operation shownThe diagram indicates the following conditions:– circuit-breaker open and connected– circuits de-energized– closing springs discharged

Caption= Number of diagram figure

* = See note indicated by the letter-QB = Circuit-breaker applications-BM = Shunt Test Unit device for controlling

continuity of the shunt opening andclosing release winding (see note D)

-MS = Closing spring charging motor (seenote C)

-BB1..2-3 = Circuit-breaker auxiliary contacts-BS1 = Spring charging motor limit contact-BS2 = Contact for signalling closing springs

charged/discharged-BD = Position contact of the enclosure

door-BB4 = Auxiliary contact for passage of the

circuit-breaker with momentaryclosing during opening

-BB5 = Contact for electrical signalling ofundervoltage release energised

-BT2 = Contacts for electrical signalling ofcircuit-breaker in isolated position(see note E)

-BT1 = Contacts for electrical signalling ofcircuit-breaker in connected position(see note E)

-BT3 = Circuit-breaker position contact,open during the isolation run

-SC = Pushbutton or contact for circuit-breaker closing

-SO = Pushbutton or contact for circuit-breaker opening

-XB = Connector of the circuit-breakercircuits

-XB2…10 = Application connectorsXB1 = Terminal box in the switchgear

(outside the circuit-breaker)-RL1 = Locking magnet. When de-energised

it mechanically prevents circuit-breaker closing. It is possible to limitconsumption by connecting adelayed pushbutton in series toenable the operation

50


Notes

A) The circuit-breaker is only fitted with theaccessories listed in the order confirmation. Tomake out the order, please consult the cata-logue of the apparatus.

B) The undervoltage release can be supplied forpower supply with voltage branched on thesupply side of the circuit-breaker or from anindependent source. The use of both theinstantaneous and electronic time-delaydevice undervoltage release is allowed(outside the circuit-breaker). Circuit-breakerclosing is only allowed with the releaseenergised (the lock on closing is achievedmechanically). Should there be the samepower supply for the shunt closing and under-voltage releases and automatic circuit-breakerclosing on return of the auxiliary voltage isrequired, it is necessary to introduce a delay ofat least 50 ms between the moment of under-voltage release consent and energisation ofthe shunt closing release. This can be done bymeans of a circuit outside the circuit-breakerincluding a permanent make contact - thecontact in fig. 24 and a time-delay relay.

C) Check the power available in the auxiliarycircuit o verify the possibility of starting severalmotors at the same time to recharge theclosing springs. To prevent excessive absorp-tion, the springs must be charged manuallybefore energising the auxiliary circuit.

D) The circuit for controlling continuity of the shuntopening release winding must only be used forthis function. It is possible to use the Shunt TestUnit to verify continuity of the various releases.

E) The contacts for electrical signalling of circuit-breaker in the connected and isolated position(-BT1 and -BT2) shown in figs. 51-52 arelocated on the circuit-breaker (moving part).

F) Fig. 3 is provided when fig. 31 or 32 is re-quired, and fig. 4 when fig. 33 or 34 is required(in the latter case, the compulsory accessory is-BT3).

G) When fig. 10 is required, the -BB3 31-32contact of figs. 32 and 34 is not available.When fig. 30 is required, the -BB3 53-54contact of figs. 32 and 34 is not available.

Fig. 9 = Second shunt opening release circuitwith possibility of continuous control ofthe winding (see note D)

Fig. 10 = Opening solenoid for release outsidethe circuit-breaker

Fig. 22 = Electrical signalling of closing springscharged

Fig. 23 = Electrical signalling of closing springsdischarged

Fig. 24-25 = Contact for electrical signalling ofundervoltage release energised. It ispossible to have an open or closedcontact

Fig. 30 = Auxiliary passage contact withmomentary closing during circuit-breaker opening

Fig. 31-32-33-24 = Available circuit-breakerauxiliary contacts

Fig. 51 = Contacts for electrical signalling ofcircuit-breaker in the connected andisolated positions located on thecircuit-breaker. When fig. 51 isrequested, fig. 31 or 32 is compulsory

Fig. 52 = Contacts for electrical signalling ofcircuit-breaker in the connected andisolated positions located on thecircuit-breaker. When fig. 52 isrequested, fig. 33 or 34 is supplied onrequest.

IncompatibilityThe circuits indicated by the following figurescannot be supplied at the same time in the samecircuit-breaker:

3-4 31-32-33-34 4-31-32

3-33-34 24-25 31-32-52

33-34-51 51-52 22-23

51

5

Graphical symbols for electrical diagrams (IEC 60617 and CEI 3-14 ... 3-26 Standards)

Thermal effect

Electromagneticeffect

Timing

Pushbuttoncontrol

Key control

Earth(general symbol)

Mass, frame

Conductors inshielded cable (twoconductors shown)

Connection ofconductors

Terminal or clamp

Socket and plug(female and male)

Resistor(general symbol)

Capacitor(general symbol)

Motor(general symbol))

Rectifier with twohalf-waves (bridge)

Make contact

Break contact

Change-overbreak beforemake contact

Passing makecontact closingmomentarily duringrelease

Closing positioncontact (limitswitch)

Opening positioncontact (limitswitch)

Power circuit-breakerwith automaticopening

Control coil(general symbol)

Lamp (generalsymbol)

ABB Trasmissione & Distribuzione S.p.A.Unità Operativa Sace T.M.S.Via Friuli, 4I-24044 DalmineTel: +39 035 395111Fax: +39 035 395874E-mail: [email protected]://www.abb.com

ABB Calor Emag Mittelspannung GmbHOberhausener Strasse 33 Petzower Strasse 8D-40472 Ratingen D-14542 GlindowPhone: +49(0)2102/12-1230, Fax: +49(0)2102/12-1916E-mail: [email protected]:http://www.abb.de/calor

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