ABB V-Contact VSC Medium Voltage Vacuum Contactors technical characteristics

Compliance with Standards

V-Contact VSC contactors comply with the Standards of the major

industrialised countries and in particular with the IEC 60470 (2000)

and GB/T 14808 Standards.

Operating characteristics- Ambient temperature: - 5℃... + 40℃- Relative humidity: < 95 %  (without condensation)- Altitude: < 1000 m s.l.m.

For other conditions, please contact us.

Main technical characteristics- Chopping current value ≤0.5 A- Maintenance-free- Suitable for installation in prefabricated substations and switchgear

both of the card (slim line) and traditional type- High number of operations- Direct checking of contact wear- Long electrical and mechanical life- Remote control- Multi-voltage feeder- Bistable drive of the type with permanent magnets

Electrical life

The electrical life of V-Contact VSC contactors is defined in category AC3.

Interruption principle

The main contacts operate

inside the vacuum

interrupters (the level of

vacuum is extremely high:

13 x 10 -5 Pa).

On opening, there is rapid

separation of the fixed and

moving contacts in each

contactor interrupter.

Overheating of the contacts, generated at the moment they separate,

causes formation of metallic vapours which allow the electric arc

to be sustained up to the first passage through zero current.

On passage of zero current, cooling of the metallic vapours allows

recovery of high dielectric resistance able to withstand high values

of the return voltage.

For motor switching, the value of the chopped current is less than

0.5 A with extremely limited overvoltages.