Question
Download Solution PDFA megger is a device used for measuring:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe Megger method is used for the measurement of the high value of resistance. And this is best suitable for the measurement of insulation resistance of cables.
Additional Information
To measure High resistance Three(3) terminals are required.
Where,
Terminals 1 and 2 are input terminals, Terminal 3 is called Guard Terminal
Guard Terminal is used to eliminate or bypass Leakage currents while measuring.
Examples of High Resistance Materials:
- Cable Insulation Resistance.
- All Motors, generators, and transformers winding's insulation resistance.
- All semiconductor devices when reverse biased.
Methods to measure High Resistance:
- Loss of charge method.
- Direct-Deflection method.
- Mega ohm Bridge.
- Meggar.
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