Protection spark gaps form an important part of series compensation schemes in high voltage transmission and distribution networks. Their primary function is to safeguard the series capacitors from transient over voltages. In the event of fault, the line current may momentarily increase and the corresponding voltage across the capacitor banks may exceed the short time over-voltage limit . The spark gap, which is connected in parallel with the bank is set to spark over when the voltage across the bank exceeds the permissible level. Thus the spark gap acts as a bypass for the capacitor during faults.

 

Technical Parameters

Type of Gap : Non Self Extinguishing
Application : For capacitor bank protection
In 132 KV/220 KV series
compensation scheme
Electrode System : Main gap
Range of Flashover setting : 55 KV to 120 Kv
Short time rating : 15 KA for 0.2S
Deionization time : 0.4 sec. For 80%
withstand voltage
Tolerance in flashover voltage : +/-5%
Type pf terminal : Stud type
Material of terminal Brass
Type of enclosure : Aluminum
Insulation between enclosure and Porcelain
Insulator
Insulated Platform