Very Information pdf For Electrical Engineers

⭕ VISUAL INSPECTION
⭕ WIRING AND FERRULING CHECK
⭕ BUS CONTINUITY, PHASING AND CONTACT RESISTANCE TEST
⭕ CURRENT TRANSFORMER CHECKS

✅ Visual Inspection
✅ Insulation resistance test
✅ Winding resistance measurement
✅ Polarity test
✅ Ratio test by current primary injection
✅ Magnetizing current test (minimum 2 points above )
✅ Loop resistance measurement test (burden test)
✅ Phase identification test
✅ Verify secondary circuits, terminals, shorting/isolating links by primary injection
High voltage test.
✅ Single point earthing check
✅ Demagnetize CT cores after all tests

VOLTAGE TRANSFORM ER CHECKS
✅ Winding resistance test
✅ Insulation resistance test HV/LV/G
✅ Ratio test
✅ Polarity test
✅ Check VT HV neutral solidly grounded
✅ Verify secondary circuits, terminal to terminal for correctness and tightness
✅ Loop resistance test and burden test

CIRCUIT BREAKER CHECKS
✅ Visual inspections.
✅ Contact resistance measurements.
✅ High- Pot and insulation resistance Test.
✅ Functional check of trip free and anti pump circuits.
✅ Functional checks of breaker operation counter.
✅ Check correct operation of all auxiliary contacts (for breaker open/closed positions).
✅ Timing test using an electronic oscillograph.
✅ Check the correct functioning of interlocks and limits switches.

TESTING OF METERING ACCURACY BY SECONDARY INJECTION
✅ Ammeter check
✅ Voltmeter check
✅ KWH meter check.
✅ KW meter check.
✅ Current transducer check
✅ Voltage transducer check
✅ KW transducer check

TEST OF PROTECTION RELAYS BY SECONDARY INJECTION.
✅ Over Current Relay
✅ Earth Fault Relay
✅ Under Voltage Protection Relay
✅ Neutral Over Voltage Protection Relay
✅ Trip Circuit Supervision Relay
✅ Tripping Relay

PRIMARY CURRENT INJECTION TEST
⭕ HIGH- POT AND INSULATION RESISTANCE TEST
⭕ FUNCTIONAL CHECK

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#HighVoltageTransmission #RenewableEnergy #PowerGrid
#ElectricPower #SustainableEnergy #GridStability
#EnergyEfficiency #TandD #SmartEnergy #HVDC

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