Description: REPAIRING AND SERVICING TO ATTEND SF 6 ABB MAKE CIRCUIT BREAKER INSTALLED AT 220 KV SS DUNARA UNDER ETD JHANSI Name of Work REPAIRING AND SERVICING TO ATTEND SF 6 ABB MAKE CIRCUIT BREAKER INSTALLED AT 220 KV SS DUNARA UNDER ETD JHANSI
Details: Repairing/servicing to attend SF6 gas leakage and compelte overhauling of 145KV SF6 ABB make circuit breaker installed at 132KV Dunara-Diamond Bay and 40 MVA Transformer-II Bay at 220KV S/S Dunara. Work Consist of:• To check and identify gas leakage by help of gas leakage detector.• Extract SF6 gas from the pole units by help of SF6 gas extraction plant and store it in empty gas cylinder for reuse.• Dismental the top covers from the pole units along with fixed contacts.• Cleaning policing of contacts and apply micro carbon grease and fitted the covers with replacing top Oring and absorbent.• Dismantling the mechanism assembly, cleaning and greasing, and its proper adjustments. • Dismantling close/trip coil assembly and cleaning its plunger and adjust the gap.• Dismantling the roller pin from horizontal rod assembly, cleaning and greasing.• Apply vacuum up to specified value and keep it for 2/3 hours to check no loss of vacuum.• Fill SF6 gas up to specified value and check gas leakage
Sector: Transmission