Answer / vijaykumar shetye

A megameter, or a Megger as it is commonly called, is used
to measure the insulation resistance of cables and other
electrical equipment. The measured value is in mega ohms.
Hence the term Megger.
Most meggers generate 500 Volts DC supply, but their
current capacity remains low.
When the two terminals of a megameter is connected to
across the equipment to be tested, the high voltage gets
leaked into the equipment. The resistance is inversely
proportional to the current flowing through the equipment
under test.
Originally, most meggers were analog in nature, and were
generating high voltage using a dynamo, when the lever is
rotated at high speed.
Today most meggers available are digital, and can
generate 500 volts as well as 1000V. Some meggers have
winding resistance testing facility as well, and hence can
be used as a single tool to test the resistance of a motor
in ohms as well as in Megaohms.
Meggers used for checking high resistance like that of
mains transformrs, generate much higher voltages and are
generally analog type.

Answer / anusha reddy.m

Megger is used to find the insulation resistance .

Answer / iraikhan

megger is a device with a hand driven dc generator and
direct reading ohm meter for testing the insulators in
other words its resistance

Answer / k.babu

Megger inbuilted inside a dynomo which is used to energise
the system. Which is used to find the Earth Resistance

Answer / meghraj kabdule

Friends Megger is mfg. company which first find out the IR
tester for the measurment of insulation resistance.

Answer / taufic

megger is a device with a hand driven dc generator and
direct reading ohm meter for testing the insulators in
other words its resistance

Answer / deepak kumar

megger is generally used for measuring the high resistance,hence it reffer as the megger mens it can measure the 500 mega ohms.it is used for testing the o.c and s.c test.it is combination of generator and direct ohmmeter.the speed of the megger is kept at 160 r.p.m.there are three range of megger.
1-300 v
2-750 v
3-1000 v

Answer / shibukp22

megger testing tow type conducter to counducter and
counducter to earth

Answer / ashwin

Go through the contents of this link:

http://en.wikipedia.org/wiki/Megger

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