DKE German Commission for Electrical, Electronic & Information Technologies of DIN and VDE
DIN EN 60255-127
; VDE 0435-3127:2014-09
Measuring relays and protection equipment - Part 127: Functional requirements for over/under voltage protection (IEC 60255-127:2010); German version EN 60255-127:2014
Messrelais und Schutzeinrichtungen - Teil 127: Funktionsnorm für Über-/Unterspannungsschutz (IEC 60255-127:2010); Deutsche Fassung EN 60255-127:2014
Overview
This standard specifies minimum requirements for the protection function, measurement characteristics and time delay characteristics of over/under voltage relays. It 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 for phase undervoltage protection, positive sequence undervoltage protection, phase overvoltage protection, residual/zero-sequence overvoltage protection and negative sequence/unbalance overvoltage protection are dealt with. The responsible committee is DKE/K 434 "Messrelais und Schutzeinrichtungen" ("Measuring relays and protection equipment") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.
