Question
Download Solution PDFAmong the following, which meter is regarded as insulation tester?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- 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 hand-driven generator (permanent magnet D.C. generator).
- The operation of a megger is based on moving coil meter.
- Earth pit resistance is measured with an earth tester, also called earth megger which can test the resistance across a range of currents and distances.
- Insulation megger is used to measure the insulation resistance of the cables.
- Frequency meter is used for measuring the unknown frequency of a signal. The frequency meter consists of one inductive and one resistive coil.
- When the frequency of the signal varies from standard frequency, the current distribution across the coils becomes changes.
- The wattmeter is an instrument used for the measurement of power.
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