Correct Answer - Option 3 : megger
Megger:
The megger is known as an insulation tester.
Megger is a portable instrument to measure high insulation resistances.
It works on the principle of electromagnetic induction.
The electrical power to a megger is provided by a permanent magnet D.C. generator.
The test voltages are usually of order 500, 1000, or 2500 V are generated by a hand-driven generator (permanent magnet D.C. generator).
The operation of a megger is based on a moving coil meter.
| Instrument |
Measured |
| Ammeter |
Current |
| Voltmeter |
Voltage |
| Megger |
Insulation Resistance |
| Energy-Meter |
Energy |
| Watt-Meter |
Power |
| Ohm-Meter |
Resistance |
