Protection Engineering Basics and Schemes Protection Engineering | Page 60

Outdoor PT
To measure Insulation Resistance
between secondary contacts
Application Level
 For low voltage system, we can use 0.5-2.5KV Dc IR
Test Set
 For Medium and high voltage we can use 2.5KV 5 KV
DC IR Test Set
 For Extra high voltage , Recommended is 10KV DC IR
Test set
pg. 60