In the late 1970’s, Brush Switchgear Ltd designed and certified a vacuum contactor high voltage motor starter range of switchgear: the Hawkvac 6 (HV6) range.
In recent years, Switchgear Support Ltd have seen an increase in failures of the vacuum contactor (vacuum interrupters) or its associated components (contactor coils, electronics). The original manufacturer of the vacuum contactor assembly no longer manufacture these components and do not offer an alternative complete assembly or individual components. The failures are purely attributable to age as the earlier production units are now approaching forty years operational service.
These units often form part of a composite high voltage electrical switchboard, and the switch carriages are withdrawable units, allowing easy removal from its switchboard.
Switchgear Support Ltd have developed a retrofit contactor solution to enable the continued operating life of the HV6 switchgear. The retrofit solution ensures all of the original custom specific functionality is retained for the overall switchgear.
“the condition in which they were returned was immaculate”
The retrofit can be conducted in our works with full refurbishment and testing facilities (including partial discharge testing of the complete truck) or can be conducted on site with fully detailed Method statements provided. Retrofit vacuum contactor undergoing High Voltage power frequency tests and partial discharge tests.
Ratings:
Rated voltage
Rated current
Breaking capacity
Overcurrent peak value
STC withstand
Mechanical life
Electrical life
Impulse withstand
Power frequency (1 min)
Closing coil voltage
Original Contactor
6.6kV
400A
4400A
65kA (10ms)
4400A, 2 secs
2.5 x 106
0.25 x 10
60kV
20kV
100/110Vdc
Retrofit Contactor
7.2kV
630A
5040A
65kA (10ms)
6300A, 4 secs
10 x 106
0.25 x 106
60kV
28kV
110/220/380V ac/dc