ABB-Substation-Condition-Monitoring-Schedule(4)

Buses and Shield wire

Inspect for loose clamps or connections. Inspect for bending of Alu-tube bending. Observe the condition of flexible buses and shield wires for any damages.

Porcelain Insulators and Bushings (For Bus post / Suspension / Circuit breaker / CT / CVT / PT & Transformer bushings)

Inspect all insulators and equipment bushings for chipped petticoats and fractured or cracked porcelain. Flashover in the past may have damaged a portion of the glazing on the porcelain. Make this inspection at close range. Replaced damage bushings. Remove dust and dirt from porcelain insulators with suitable methods. Cable

Inspect exposed sections of cable for physical damage. Inspect the insulation or jacket for signs of deterioration. Check for loose connections, lugs, tightness, cracking of lugs etc. Inspect shield grounding (where applicable), cable support and termination. Check for any sparking marks at termination or joint. Clean sparking marks if any and make proper joint with proper tightening and lugging.

LT Cable & Metal clad switchgear (Control-Metering, Relay panel, Outdoor and indoor panel)

Examine meters, relays and instruments externally to check for loose connections and damage to cases and covers. Check whether the instruments are reading or registering. Check the functioning of annunciator panels. Inspect for damage to enclosures, doors, latching mechanisms, locks etc. Check out for burned-out lamps.