BASIC INFO

ABB VD4/P 12.06.20 p135 vacuum circuit breaker Selection Guide for 20 kA Withdrawable Panels

 

ABB VD4/P 12.06.20 p135 vacuum circuit breaker is a withdrawable medium-voltage breaker designation listed by ABB for UniGear ZS1 switchgear. ABB technical selection tables associate this configuration with 12 kV rated voltage, 630 A rated uninterrupted current and 20 kA short-circuit breaking current. It is relevant to replacement, spare-unit and switchgear maintenance enquiries where both electrical ratings and mechanical interchangeability must be confirmed.

 

Verified identification and rating summary

 

Manufacturer	ABB
Type designation	VD4/P 12.06.20 p135
Execution	Withdrawable vacuum circuit breaker
Switchgear family	UniGear ZS1
Rated voltage	12 kV
Rated uninterrupted current	630 A
Short-circuit breaking current	20 kA
Mechanical variant	p135 designation; verify dimensions and cassette interface

 

The model code is more useful than a generic request for a 12 kV breaker. The p135 element should be treated as part of the complete ABB mechanical designation, not as the breaking-current value. The 20 kA element in 12.06.20 identifies the short-circuit breaking-current class.

 

Reference image notice: the supplied photograph shows an ABB VD4 series breaker for visual identification. It is a reference image, not a guaranteed exact photograph of ABB VD4/P 12.06.20 p135 vacuum circuit breaker. Confirm the complete type designation, rating plate, truck interface, control voltage, wiring and accessories before ordering.

 

Why electrical ratings alone do not confirm interchangeability

 

A breaker with the same 12 kV, 630 A and 20 kA ratings is not automatically a direct substitute for ABB VD4/P 12.06.20 p135 vacuum circuit breaker. Withdrawable equipment must match the switchgear cassette, contact arrangement, shutter and earthing interfaces, racking system, interlocks, control plug, auxiliary wiring and operating mechanism requirements.

 

For an installed UniGear ZS1 panel, record the panel type and serial information as well as the breaker nameplate. Mechanical dimensions, contact height and pole arrangement should be checked against the original ABB documentation or a measured installed unit before a replacement is approved.

 

VD4 vacuum interruption and operating principle

 

The ABB VD4 family uses vacuum interrupters embedded in resin poles and a mechanical spring operating mechanism. In a correctly selected ABB VD4/P 12.06.20 p135 vacuum circuit breaker, these design features support medium-voltage switching duties while the withdrawable arrangement permits service and test positions within the compatible panel.

 

Maintenance condition, operating history and mechanism timing remain important. A procurement decision should distinguish between a complete breaker, a retrofit package, a truck assembly, loose accessories and replacement parts because these scopes are not equivalent.

 

Panel-fit and control checklist

 

1. Photograph the complete breaker nameplate and switchgear panel label.
2. Confirm fixed or withdrawable execution and identify the existing cassette or truck design.
3. Verify rated voltage, current, frequency, insulation level and short-circuit duty.
4. Record the closing and opening coil voltages, charging motor voltage and auxiliary contact arrangement.
5. Check control plug pinout, secondary wiring, interlocks, contact position and racking dimensions.
6. List required releases, key locks, blocking magnets, counters and other accessories.
7. Provide quantity, destination, delivery target and requested test or origin documents.

 

For a planned shutdown, confirm ABB VD4/P 12.06.20 p135 vacuum circuit breaker before the outage date and allow time for dimensional and schematic review. A full nameplate photo, front and side views, control-plug photo and panel information reduce the risk of receiving an electrically similar but mechanically incompatible breaker.

 

Buyer questions answered

 

What ratings are represented by VD4/P 12.06.20 p135?

ABB selection data lists 12 kV rated voltage, 630 A rated uninterrupted current and 20 kA short-circuit breaking current for this designation.

 

Does p135 mean the breaking capacity?

No. The 20 element corresponds to the 20 kA breaking-current class. Keep p135 as part of the complete mechanical type designation and verify the relevant dimensions and panel interface.

 

Can another VD4 with the same ratings replace it directly?

Not without a compatibility review. Matching electrical ratings do not confirm the truck, contacts, interlocks, control wiring, releases or accessories.

 

What information is needed for a quotation?

Send the full ABB VD4/P 12.06.20 p135 vacuum circuit breaker designation, breaker and panel nameplate photographs, quantity, control voltage, required accessories, delivery destination and target date.

 

RFQ support for ABB VD4 replacement projects

 

HKXY can review enquiries for ABB VD4/P 12.06.20 p135 vacuum circuit breaker as a complete model-specific line item. For legacy switchgear or uncertain configurations, include photographs and drawings so that electrical ratings, mechanical execution and accessory requirements can be compared before quotation.

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