BS 5424-2:1987
Current
The latest, up-to-date edition.
Low-voltage controlgear Specification for semiconductor contactors (solid state contactors)
Hardcopy , PDF
English
11-30-1987
Foreword
Committees responsible
1 General
1.1 Scope
1.2 Object
2 Definitions
2.1 Definitions concerning contactors and semiconductor
contactors
2.2 Definitions concerning states, control and
auxiliary circuits of a semiconductor contactor
3 Classification
4 Characteristics of semiconductor contactors
4.1 Summary of characteristics
4.2 Type of semiconductor contactor
4.3 Rated values
4.4 Control circuits
4.5 Auxiliary circuits
4.6 Co-ordination with short-circuit protective devices
5 Nameplates
6 Standard conditions for operation in service
6.1 Normal service conditions
7 Standard conditions for construction
7.1 Mechanical design
7.2 Enclosures
7.3 Temperature rise
7.4 Dielectric properties
7.5 Limiting values of operation
8 Tests
8.1 Verification of the characteristics of
semiconductor contactors
8.2 Type tests
8.3 Routine tests
8.4 Special tests
Appendices
A Information to be given by the user when conditions
for operation in service differ from the standard
B Clearances and creepage distances for low-voltage
contactors (under consideration)
C Protection of a contactor by a short-circuit
protective device (under consideration)
D Conventional test circuit for the verification of
rated making and breaking capacities of contactors
E Method of presenting a load diagram
F Test equipment and circuits for showering arc test
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