# **HV Panel Checklist**

## **1. General Information**

* Panel ID/Code: \_\_\_\_\_\_\_\_\_\_
* Location: \_\_\_\_\_\_\_\_\_\_
* Voltage Rating: \_\_\_\_\_\_\_\_\_\_ kV
* Manufacturer: \_\_\_\_\_\_\_\_\_\_
* Year of Commissioning: \_\_\_\_\_\_\_\_\_\_
* Inspector Name: \_\_\_\_\_\_\_\_\_\_
* Date: \_\_\_\_\_\_\_\_\_\_

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## **2. Daily / Shift Checklist**

* [ ] Panel clean and free from dust/moisture
* [ ] Indicating lamps and meters working
* [ ] No abnormal sound or smell
* [ ] Cooling system functioning (if applicable)
* [ ] Breaker position (ON/OFF/TRIPPED) indicated correctly
* [ ] Alarm/annunciator status normal
* [ ] Temperature/humidity inside panel within safe limits

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## **3. Weekly Checklist**

* [ ] Visual inspection for loose connections
* [ ] Check operation of space heaters
* [ ] Earthing connection intact and secure
* [ ] Functionality of control switches
* [ ] SF6/ Vacuum breaker status normal
* [ ] Check pressure gauge (for SF6 breaker)

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## **4. Monthly Checklist**

* [ ] Thermographic scanning of busbars & connections
* [ ] Measure insulation resistance of control wiring
* [ ] Relay indication and reset check
* [ ] Panel door locks, hinges, gaskets in good condition
* [ ] Clean filters and ventilation grills
* [ ] Functional test of alarms

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## **5. Quarterly / Half-Yearly Checklist**

* [ ] Protection relays tested (50/51, 87, 64, 59, 27, etc.)
* [ ] Circuit breaker mechanical operation check
* [ ] Trip circuit supervision relay tested
* [ ] Measure contact resistance of breakers
* [ ] Verify interlock operation (electrical & mechanical)
* [ ] Test closing and tripping coils

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## **6. Yearly Checklist**

* [ ] Full relay calibration and testing
* [ ] Insulation resistance (megger test) of busbar & feeders
* [ ] High potential (HiPot) test as per standards
* [ ] Functional testing of CTs & PTs
* [ ] Oil test (for oil CBs, if applicable)
* [ ] SF6 leakage check and gas refilling (if applicable)
* [ ] Verify schematic diagram labeling & mimic diagram accuracy

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## **7. Safety Checks**

* [ ] Tools & PPE in good condition
* [ ] Proper isolation before maintenance (LOTO applied)
* [ ] Danger boards/signs in place
* [ ] Fire extinguisher available nearby
* [ ] First-aid kit available

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✅ **Importance:**

1. * Prevents failures and unplanned outages
2. * Ensures operator & equipment safety
3. * Helps in predictive and preventive maintenance
4. * Provides history for audits and compliance