HT SWITCHGEAR
Technical Information of HT Switchgear:
TYPE VCB LBS
Model VHT630 VHT800 VHT1250 LHT630 LHT800 LHT800
Rated Voltage (KV) 12 12 12 12 12 12
Rated Current (A) 630 800 1250 630 800 1250
Short Circuit Breaking 16/20 20/25 50/63/80 25 25 25
Current (KA)
Basic impulse level (KV) 75 75 75 75 75 75
Short Circuit Making 50 63 50 50 50 50
Current (KA)
Max. interrupting time 3 3 3 3 3 3
(Cycle
Max. Opening time (Cycle) 2.5 2.5 2.5 2.5 2.5 2.5
Max. Closing Time (Cycle) 2.5 2.5 2.5 3 3 3
Normal Operating DutyO-3-CO-CO O-3-CO-CO O-3-CO-CO
Dimension
Fixed/Draw-out 100×80×210 100×80×210 100×80×210 100×90×210 100×90×210 100×90×210
(L×W×H.cm
HT SWITCHGEAR:
The High Tension switchgear are used switching for system voltage of mid level (6.30kv-33kv) as well as high level voltage (33kv-230kv). For lower capacity of sub-station it is used as LBS but for higher capacity of sub-station it used as VCB, MOCB, SF6-CB these are facilitating both manual and remote operation.
CONSTRUCTION:
· Metal enclosed and air ventilated with sheet steel of SWG-14.
· Properly welded steel structure
· Low voltage compartment on the top of the cubicle
· Long creepier distance
· Circuit breaker mounted fixed or withdraw able truck
· Single bus-bar
· Fully factory assembled
· Power coating point
· Cable entrance usually provided in the bottom f the cubicles
· Top entry can also be provided upon request
TYPE:
· LBS (Load Break Switch) Manual
· LBS ( Load Break Switch) Motor Drive
· VCB (Vacuum Circuit Breaker)
· MOCB (Minimum Oil Circuit Breaker)
· SF6-CB (Sulpher Hexa Floride Circuit Breaker)
PERSONNEL SAFETY:
· All switching operations performed with front door enclosed.
· Earthed metal partitions contact with line parts.
FEATURES:
· Circuit Breaker mounted on withdraw able truck also fixed type on request
· Suitable for rapid auto re-closing duty
· The charging time of the breaker is only 5 to 6 sec
· Adequate phase clearance and height as per standards to ensure safe operation
- The spring can be charged electrically, by DC or AC through
- Rectifier by DC also manually by charging motor
- Motor and manual operating device provides remote control function
- Instant trip function
- The electrical devices used in the units allow future changes design, there by assuring a high device of diversity
- The mounting, erection and commissions is very simple
- The device which are out of services in the equipment are easily accessible
- Additional accessories can be provided for VCB servicing such as;
- Auxiliary Switch (7NO+&NC),
- Closing Coil (24,30,48,110,220V DC/AC),
- Tripping Coil (24, 30, 48,110,220V DC/AC).
