The Bureau of Indian Standards (BIS) on September 21, 2024, issued the date of withdrawal of the Guide for Testing of Circuit-Breakers with Respect to Out-of-Phase Switching.
The following Indian Standards were withdrawn on September 06, 2024:
• IS 9135 – 1979 Guide for Testing of Circuit-Breakers with Respect to Out-of-Phase Switching
[Notification No. HQ-PUB017/1/2020-PUB-BIS (1032)]