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BS

PDF Standards BS 142-3-3.1:1983

Electrical protection relays. Requirements for single input energizing quantity relays-Specification for single input energizing quantity measuring relays with non-specified time or independent specified time
standard by BSI Group, 07/29/1983

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BS

PDF Standards BS 142-3-3.2:1983

Electrical protection relays. Requirements for single input energizing quantity relays-Specification for single input energizing quantity measuring relays with dependent specified time
standard by BSI Group, 07/29/1983

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