ABB V-Contact VSC Medium Voltage Vacuum Contactors Description

General

The medium voltage V-Contact VSC contactors are apparatus

suitable for operating in alternating current and are normally used

to control users requiring a high number of hourly operations.

The V-Contact VSC contactor introduces the drive with permanent

magnets, already widely used, experimented and appreciated in

medium voltage circuit-breakers, into the worldwide panorama of

medium voltage contactors.

The experience acquired by ABB in the field of medium voltage

circuit-breakers fitted with drives with  "MABS"  permanent magnets,

has made it possible to develop an optimised version of the actuator

(bistable MAC drive) for medium voltage contactors.

The drive with permanent magnets is activated by means of an

electronic multi-voltage feeder. The feeders differ according to the

integrated functions and to the auxiliary power supply voltage.

Three bands of power supply are available with which all the voltage

values required by the major international Standards can be covered.

Each feeder is able to take any voltage value within its own operating band.

All the contactors mentioned above are available, on request, in one

of the two following versions.

- SCO (Single Command Operated): closing takes place by supplying

auxiliary power to the special input of the multi-voltage feeder. On

the other hand, opening takes place when the auxiliary power is

either voluntarily cut off (by means of a command) or involuntarily

(for lack of auxiliary power in the installation).

- DCO (Double Command Operated): closing takes place by

supplying the input of the closing command of the apparatus in

an impulsive way. On the other hand, opening takes place when

the input of the opening command of the contactor is supplied

in an impulsive way.

Fields of application

The V-Contact VSC contactors are suitable for controlling electrical

apparatus in industry, in the service sector, in the marine sector, etc.

Thanks to the breaking technique with vacuum interrupters, they

can operate in particularly difficult environments.

They are suitable for control and protection of motors, transformers,

power factor correction banks, switching systems, etc. Fitted with

suitable fuses, they can be used in circuits with fault levels up to

1000 MVA (VSC7 - VSC12).