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BSI BS EN 60255-127:2014

Measuring relays and protection equipment -- Functional requirements for over/under voltage protection
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BSI BS EN 60255-127:2014

Measuring relays and protection equipment -- Functional requirements for over/under voltage protection

PUBLISH DATE 2014
PAGES 28
BSI BS EN 60255-127:2014

This part of IEC 60255 specifies minimum requirements for over/under voltage relays. The standard includes specification of the protection function, measurement characteristics and time delay characteristics.

This standard defines the influencing factors that affect the accuracy under steady state conditions and performance characteristics during dynamic conditions. The test methodologies for verifying performance characteristics and accuracy are also included in this standard.

The over/under voltage functions covered by this standard are as follows:

IEEE/ANSI C37.2
Function numbers
IEC 61850-7-4
Logical nodes
Phase undervoltage protection 27 PTUV
Positive sequence undervoltage protection 27D PTUV
Phase overvoltage protection 59 PTOV
Residual/zero-sequence overvoltage protection 59N/59G PTOV
Negative sequence/ unbalance overvoltage protection 47 PTOV

The general requirements for measuring relays and protection equipment are specified in IEC 60255-1.

SDO BSI: British Standards Institution
Document Number EN 60255-127
Publication Date Feb. 28, 2014
Language en - English
Page Count
Revision Level
Supercedes
Committee PEL/95
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