BS 5992-4:1983
Current
The latest, up-to-date edition.
Electrical relays Specification for contact loads of preferred values used in endurance tests for electrical relay contacts
Hardcopy , PDF
English
29-04-1983
National foreword
Committees responsible
Section one - General and definitions
1 General
1.1 Scope and object
1.2 General requirements
2 Terms and definitions
2.1 Application category of contacts
3 Standard values
3.1 Application categories of contacts
Section two - Standard values for categories 0 and 1
4 Contact loads
4.1 D.C. and a.c. (50 Hz or 60 Hz) resistive loads
4.2 D.C. inductive loads
4.3 Capacitive load
4.4 D.C. relay load
4.5 D.C. open-ended cable loads (floating cable)
4.6 D.C. cable loads combined with resistive load
4.7 D.C. cable load combined with relay load
Section three - Standard values for categories 2 and 3
5 Contact loads
5.1 D.C. and a.c. (50 Hz, 60 Hz or 400 Hz) resistive
loads
5.2 Inductive loads
5.3 Capacitive loads
5.4 Relay load
Specifies characteristics of standard types of contact load to be used in endurance tests of electrical relay contacts over ranges of voltages and currents corresponding to defined application categories. Also lists preferred values for contact loads.
| Committee |
PEL/95
|
| DevelopmentNote |
Also numbered as IEC 60255-14 Supersedes 78/27037 DC and 80/22638 DC (09/2005)
|
| DocumentType |
Standard
|
| Pages |
16
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This standard applies to contact assemblies of all types of relays covered by the Publication 255 series: Electrical Relays.
This standard specifies preferred characteristics of the contact loads to be used in endurance tests of electrical relay contacts over the ranges of voltages and currents defined by application categories. Preferred values are given for various types of load including relay and cables.
As a result of further consideration the title and values of various tables differ slightly from those published in IEC Publication 225-0-20: Contact Performance of Electrical Relays.
The detail specifications2) shall refer to these preferred values of contact loads but for a particular application, additional characteristics may be defined (e.g. inrush current in a contact load circuit, lamp load or motor load).
| Standards | Relationship |
| UNE-EN 12118:1998 | Identical |
| UNE-EN 61970-501:2006 | Identical |
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