IEEE 141-1969 - IEEE Electric Power Distribution for Industrial Plants, Fourth Edition
Standard Details
Testing of protective equipment is generally thought of in terms of relay testing; but its value goes far beyond mere verification of the relay's calibration. In fact, the greater number of irregularities found do not involve the relays as instruments. The testing should be so planned as to check, as far as possible, the entire scheme from instrument transformers to circuit breaker operation
Working Group Details