
Electrical protection relays. Requirements for the principal families of protection relays. Specification for general requirements for measuring relays used for protection
出版:British Standards Institution

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Specifies the general performance requirements for electrical protection measuring relays excluding thermal electrical relays and also the parameters whose values are to be declared by the manufacturer of such relays.
? British Standards Institution 2013
Replaces notes:
Replaces BS 142:1966.