
Measuring Relays And Protection Equipment - Part 149: Functional Requirements For Thermal Electrical Relays
出版:British Standards Institution

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Describes minimum requirements for thermal protection relays and includes specification of the protection function, measurement characteristics and test methodologies.
Supersedes BS EN 60255-8 & 11/30244275 DC. (10/2013)
EN 60255-149:2013 - Identical
EN 60255-149 : 2013 - Identical
IEC 60255-149 : 1ED 2013 - Identical