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BS 5424-2:1987

BS 5424-2:1987

Current

Current

The latest, up-to-date edition.

Low-voltage controlgear Specification for semiconductor contactors (solid state contactors)

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

11-30-1987

Publisher

British Standards Institution

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

Characteristics, conditions of operation and construction and testing requirements for semiconductor contactors for performing electrical operations by changing the state of electric circuits between on and off states.

This standard applies to semiconductor contactors intended for performing electrical operations by changing the state of electric circuits between on state and off state.

This standard is additional to IEC Publication 158-1: Low-voltage Controlgear, Part 1: Contactors (including Supplements A and B) which is applicable, provided it is not amended by this standard.

It applies only to semiconductor contactors, the main circuit of which is intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c.

NOTE 1 Semiconductor contactors dealt with in this standard are not intended to provide short-circuit protection of the main circuit, but may contain short-circuit protective devices for semiconductor parts.

NOTE 2 Semiconductor motor-starters will be dealt with in a later publication.

This standard applies also to hybrid-semiconductor contactors, which are also covered by the scope of IEC Publication 158-1 as concerns their electromagnetic part.

Committee
PEL/121/1
DevelopmentNote
Reviewed and confirmed by BSI, December 2012. (11/2012)
DocumentType
Standard
Pages
34
PublisherName
British Standards Institution
Status
Current

Standards Relationship
IEC 60158-2:1982 Similar to

BS EN 60255-6:1995 Electrical relays Measuring relays and protection equipment
BS 7354:1990 Code of practice for design of high-voltage open-terminal stations

BS 5420:1977 Specification for degrees of protection of enclosures of switchgear and controlgear for voltages up to and including 1000 V a.c. and 1200 V d.c.
BS 923-2:1980 Guide on high-voltage testing techniques Test procedures
IEC 60147-0:1966 Essential ratings and characteristics of semiconductor devices and general principles of measuring methods - Part 0: General and terminology
BS 5424-1:1977 Specification for controlgear for voltages up to and including 1000 V a.c. and 1200 V d.c. Contactors
PD 6499:1981 Guide to insulation co-ordination within low-voltage systems including clearances and creepage distances for equipment

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Hardcopy - English
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