OPERATING PROCEDURE FOR L. V. PANEL

1.0 AIM
To lay down a standard operating procedure for L.V. Panel.
2.0 SCOPE
Maintenance Department
3.0 AREA OF OPERATION
Maintenance department.
4.0 RESPONSIBILITY
Operator/Maintenance Supervisor concerned.
5.0 ACCOUNTABILITY
Maintenance Incharge.
6.0 CHANGE OVER OPERATION M.S.E.B. & D.G. SET.
6.1 If M.S.E.B. supply fails, the Air Circuit Breaker on L. V. Panel gets trip automatically and OFF indication comes. Then turn the interlock key anti clockwise and remove from A.C.B. key slot.
6.2 Start D. G. Set, raise voltage to read to 415 volts on voltmeter (placed on change over side) on the L. V. Panel Board, Push the interlock key in the key slot of change over switch. (Marked as D. G. Set) and turn it clockwise. Make
the change over switch ON.
6.3 When M.S.E.B. supply comes the Voltmeter on Air Circuit Breaker (A.C.B.) side indicates the voltage. Check the voltage indicated to 415 volts. Switch OFF change over switch and turn interlock key anti clockwise and remove from
key slot.
6.4 Insert the interlock key in the slot of Main Air Circuit Breaker and turn clockwise. Take the Air Circuit Breaker to ON handle upwards in anti clockwise direction and then push down in clockwise direction to switch ON the A.C.B. The ON indication comes on Air Circuit Breaker.
7.0 CAPACITORS
7.1 When power factor (P. P.) of the panel is indicated as 0.9 and above, keep the capacitor switches in OFF position.
7.2 When P. F. is between 0.85 to 0.9 keep two banks of capacitor switches in ON position.
7.3 When P. F. is below 0.85 keep all four banks of capacitor switches in ON position.
8.0 REFERENCE
F-ME-017 - Format for Daily Log Book D. G. Set.
9.0 REVIEW DATE
After 2 years or when procedure is changed.