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Benefits Associated with Retrofitting:
Considerable cost reduction compared to replacing switchgear.
Retention of existing fixed housings and main power cables thereby eliminating expensive civil works.
Retrofit vacuum circuit breakers are supplied with identical auxiliary plugs / sockets and trip / close coils as existing equipment and are mounted onto the same design trucks. Therefore down time is limited to one out / in situation.
Very low maintenance costs with few consumable spare parts.
Highly reliable and suitable for frequent switching duty.
Removal of bulk oil improves the "Health and Safety" of the site.
Can be provided with motor wound spring mechanisms which readily lend themselves for remote operation via modern technology eg. Telecontrol.
High capacity and high maintenance auxiliary battery / charger systems are eliminated.
Other Possibilities:
Oil filled VT's can be Retrofitted with cast resin VT's.
Existing current transformers may be replaced.
Electromechanical relays may be replaced with electronic relays.
Addition of telecontrol facilities for remote control and indication.
Technical Data:
Rated Volts :- Up to 13.8kV
Rated Current :- Up to 1250Amps
Frequency :- 50/60Hz Rated Short Time Current (3 Secs):- 11kV / 20kA, 7kV / 25kA, 3.6kV / 25kA
Symmetrical Breaking Current.
Power Frequency withstanding Voltage :- 28kV 1min.
Impulse withstanding Voltage :- 75kV (Bil) |
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RVCB for SWS Low Type C4X, D4X etc. |
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