Measuring relays and protection equipment - Functional requirements for frequency protectionWhat is BS EN IEC 60255 181 Requirements for frequency protection about? BS EN IEC 60255 181 is a part of the multi series standard that covers measuring relays and protection equipment. BS EN IEC 60255 181 specifies the minimum requirements for functional and performance evaluation of frequency protection. It defines a procedure to explain the documentation and publishing of the performance test results. BS EN IEC 60255 181 covers the functions based

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