Measuring relays and protection equipment - Part 151: Functional requirements for over/under current protection (IEC 60255-151:2009); German version EN 60255-151:2009
Generic specification: electromechanical all-or-nothing relays; part 2: generic data and methods of test for time delay relays; German version EN 116000-2:1992
Electromechanical elementary relays - Part 2-1: Reliability - Procedure for the verification of B<(Index)10> values (IEC 61810-2-1:2017); German version EN 61810-2-1:2017