LV, MV and HV switchgear routine inspection (all types)
Estimated duration: 1 - 3 hours • Frequency: 6-monthly (MV/HV) / annually (LV)
Asset Details
| # | Inspection Item | OK / Fail / NA | Notes |
|---|---|---|---|
| Enclosure and Environment | |||
| 1 | Panel doors close and latch securely, hinges not damaged | ☐ ☐ ☐ | |
| 2 | Enclosure free from dust, debris, moisture and condensation | ☐ ☐ ☐ | |
| 3 | Ventilation openings and cooling fans clear and operational | ☐ ☐ ☐ | |
| 4 | Cable entry seals intact, no vermin ingress | ☐ ☐ ☐ | |
| 5 | Anti-condensation heaters operational (where fitted) | ☐ ☐ ☐ | |
| Bus Bars and Connections | |||
| 6 | Bus bars free from discolouration, pitting, corrosion and contamination | ☐ ☐ ☐ | |
| 7 | Bolted connections tight, no signs of overheating or arcing | ☐ ☐ ☐ | |
| 8 | Thermal scan results reviewed, no hotspots above 10°C differential | ☐ ☐ ☐ | |
| 9 | Insulation barriers and phase separators intact, no tracking marks | ☐ ☐ ☐ | |
| Circuit Breakers | |||
| 10 | Contact wear indicator within acceptable limits | ☐ ☐ ☐ | |
| 11 | Arc chutes intact, no carbon deposits or cracks | ☐ ☐ ☐ | |
| 12 | Operating mechanism timing within manufacturer specification | ☐ ☐ ☐ | |
| 13 | Trip and close coil resistance within tolerance | ☐ ☐ ☐ | |
| 14 | Racking mechanism operates smoothly (withdrawable type) | ☐ ☐ ☐ | |
| 15 | SF6 gas pressure within range (SF6 type only) | ☐ ☐ ☐ | |
| Protection Relays and Metering | |||
| 16 | Relay settings match current protection coordination study | ☐ ☐ ☐ | |
| 17 | Relay test dates current (within calibration interval) | ☐ ☐ ☐ | |
| 18 | Metering instruments reading accurately, displays functional | ☐ ☐ ☐ | |
| 19 | Fault trip counter and operation count recorded | ☐ ☐ ☐ | |
| Interlocks and Safety | |||
| 20 | Mechanical interlocks functional (prevent incorrect switching sequence) | ☐ ☐ ☐ | |
| 21 | Electrical interlocks verified (key exchange, solenoid locks) | ☐ ☐ ☐ | |
| 22 | Door interlocks prevent access to live compartments | ☐ ☐ ☐ | |
| 23 | Earth switch operates correctly, position indication accurate | ☐ ☐ ☐ | |
| 24 | Arc flash warning labels present, legible and current | ☐ ☐ ☐ | |
| Earthing | |||
| 25 | Main earth bar connections secure, no corrosion | ☐ ☐ ☐ | |
| 26 | Earth continuity verified within specification | ☐ ☐ ☐ | |
| 27 | Equipotential bonding intact across all sections | ☐ ☐ ☐ | |
Notes / Defects Identified
Next Inspection Due
Inspector
Electrical Supervisor