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IEC 60255-12 Ed. 1.0 b:1980

Electrical relays - Part 12: Directional relays and power relays with two input energizing quantities

Specifies performance requirements for the subfamily as shown in the title. This publication forms part of a series dealing with measuring relays with more than one input energizing quantity and for which IEC 60255-6 gives the general requirements.

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International Electrotechnical Commission [iec]

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