When the test terminal of the Megger is short then the pointer reads?

When the test terminal of the Megger is short then the pointer reads?

Right Answer is:

Zero

SOLUTION

When test terminals of megger are short

1. When the test terminals are short, corresponding to zero resistance. The current from the generator flowing through the current coil is large to produce sufficient torque to overcome the counter-clockwise torque of the pressure coil.

2. When the resistance of relatively low value appears across the test points, such as when the cable insulation is wet, the current through the series winding causes the pointer to move towards zero (resistance short-circuited). However, the pointer stops at a point on the scale determined by the current through the series resistor, which in turn is governed by the value of the resistance being measured.

3. The pointer moves over a scale showing zero resistance.

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