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BS 5992-2(1980) : AMD 9688
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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ELECTRICAL RELAYS - SPECIFICATION FOR - ALL - OR - NOTHING ELECTRICAL RELAYS
15-10-1997
23-11-2012
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
5.3 Method of determining the variations relating to
the specified time
6 Mechanical durability
7 Contact performance
8 Rated burden (power)
9 Clearances 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
Appendices
A Explanatory notes
B Notes concerning the accuracy of relays
C Requirements relating to the insulation of
electrical relays and appropriate insulating
tests
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