ABB VD4 12.12.20 P150 IEC indoor vacuum circuit breaker1VCF337111R1331
VD4 medium voltage circuit breakers use vacuum interrupters embedded in the poles. This construction method makes the poles particularly sturdy and protects the interrupter from shocks, dust and condensation. VD4 circuit breakers are the best choice for the majority of modern electricity distribution applications and are used in transformer and distribution substations to control and protect motors, transformers, capacitor banks and for protecting cables.
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The VD4 medium voltage circuit-breakers use vacuum interrupters embedded in resin poles. Embedding the interrupter in resin makes the circuit-breaker poles particularly sturdy and protects the interrupter against shocks, accumulation of dust and humidity. The vacuum interrupter houses the contacts and makes up the interrupting chamber.
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ABB VD4 Circuit Breaker
VD4 1225-40
Serial-No. 1VBV0 7047058 /4012/07
IEC 62271-100
2007
Since high dielectric strength can be reached in the
vacuum, even with minimum distances, circuit
breaking is also guaranteed when the contacts
separate a few milliseconds before natural current
zero crossing.
The special shape of the contacts, the material
used, as well as the limited duration and low
voltage of the arc, guarantee minimum contact
wear and long life. In addition, the vacuum also
prevents contact oxidation and contamination.
Operating mechanism
The low speed of the contacts, their reduced travel
and exposed conductive part, limit the energy
required for the operation and therefore guarantee
extremely low wear on the system.
This means that the circuit breaker only requires
very little maintenance.
VD4 circuit breakers have mechanical operating
mechanisms with stored energy and free trip.
These characteristics allow opening and closing
operations to be performed independently of the
operator. The operating mechanism is of a simple
design, easy to use and can be customized with a
wide range of accessories which are
straightforward and rapidly installed. This
simplicity enhances the reliability of the apparatus.
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These new VD4 circuit breakers exemplify ABB’s
proven vacuum interrupter engineering and
manufacturing technology, as well as the superior
design standards employed in the production of
circuit breakers.
VD4 medium voltage circuit breakers use vacuum
interrupters embedded in the poles. This
construction technique makes the poles of the
circuit breaker particularly sturdy and protects
the interrupter from shocks, dust and
condensation. The vacuum interrupter houses the
contacts and forms the interruption chamber.
Vacuum interruption technique
• Vacuum contacts protected against oxidation
and contamination
• Vacuum interrupter embedded in the pole
• Interrupter protected against shocks, dust and
condensation
• Operation under different climatic conditions
• Limited switching energy
• Stored energy operating mechanism with anti-
pumping device supplied as standard
• Simple customizing with a complete range of
accessories
• Fixed and withdrawable version
• Compact dimensions
• Sealed-for-life poles
• Sturdy and reliable
• Limited maintenance
• Circuit breaker racked in and out with door
closed
• Incorrect and hazardous operations are
prevented thanks to special locks in the
operating mechanism and truck
• High environmental compatibility
Versions available
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Pole Distance | 150 mm |
---|---|
Breaking Capacity | 20 KA |
Rated Current | 1250 A |
Rated Frequency | 50 - 60 hz |
Type | VD4 Vacuum Circuit Breaker |
Voltage Class | 12 KV |
Feature | IEC indoor |
Catalogue Download | ABB VD4 Medium voltage vacuum circuit-breaker |
Brand | ABB |