Protection Engineering Basics and Schemes Protection Engineering | Page 54

1.2.6.3 IR Testing:
It is done by insulation Tester, we mostly use megger
insulation tester device for it, we measured rated
resistance for our own safety, and insulation is point
where we can operate any equipment with safety
assurance
Device has 3 contacts
 Line contact
 Earth Contact
 Guard
1.2.6.3.1 Megger insulation Tester:
2.5KV, 5KV and 10KV IR
tester is available in market
for testing of Electrical
equipment, it inject DC
current to measure
Resistance in any circuit.
In some equipment line
contact is designated as
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