IS: 3231 (Part 3/Sec. 1) - 1987 Reaffirmed 1992; Specification for electrical relays for power system protection Part 3 requirements for particular group of relays Section 1 Non-specified time or indepandent specified time measuring relays
IS: 3231 (Part 3/Sec. 1) - 1987 Reaffirmed 1992; Specification for electrical relays for power system protection Part 3 requirements for particular group of relays Section 1 Non-specified time or indepandent specified time measuring relays
- New Delhi BIS 1987
- 8p
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