BS EN 60255-1-00:1997

National foreword
Cooperating organizations
1 General
    1.1 Scope
    1.2 Object
2 Terms and definitions
    2.1 Fundamental terms
    2.2 Terms relating to energization (input and
          auxiliary)
    2.3 Terms relating to conditions and operation of a
          relay
    2.4 Terms relating to influencing quantities or factors
    2.5 Terms relating to contact circuits
    2.6 Terms relating to times
    2.7 Terms relating to accuracy, applicable to a given
          specified-time relay
3 Recommended values
    3.1 Energizing quantities
    3.2 Contact circuits
    3.3 Specified times
    3.4 Influencing quantities and factors
    3.5 Recommended values of intermittent periodic duty
          parameters
    3.6 Recommended values of the dielectric test voltages
    3.7 Recommended values for surge voltage tests
4 Permissible maximum temperatures
    4.1 Permissible maximum temperatures of relay parts
    4.2 Conditions for assessing maximum temperatures
5 Accuracy of the specified times
    5.1 General
    5.2 Methods of determining the errors relating to the
          specified time
6 Mechanical durability
7 Contact performance
8 Rated burden (power)
9 Clearance and creepage distances
10 Test methods
    10.1 General test conditions (under consideration)
    10.2 Energizing quantities
    10.3 Dielectric tests
    10.4 Surge voltage tests
    10.5 Temperature rise of energizing circuits
    10.6 Accuracy
    10.7 Mechanical durability
    10.8 Contact performance
    10.9 Rated burden (power)
    10.10 Insulation resistance
10.11 Environmental conditions (under consideration)
11 Data and marking
    11.1 General
    11.2 Requirements for marking
Appendix A Explanatory notes
Appendix B Notes concerning the accuracy of relays
Appendix C Requirements relating to the insulation of
             electrical relays and appropriate insulating
             tests

General requirements for all-or-nothing relays and the parameters whose values should be declared by the manufacturer. Lists appropriate terms and definitions and preferred (recommended) values of unspecified parameters. Excludes requirements of relays for telegraphy, telephony and signalling and blocking railway systems. See also BS 142:Section 2.1.