BS 4794-2.20(1982) : 1982
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
SPECIFICATION FOR CONTROL SWITCHES SWITCHING DEVICES INCLUDING CONTACTOR RELAYS, FOR CONTROL AND AUXILIARY CIRCUITS, FOR VOLTAGES UP TO AND INCLUDING 1000 V A.C. AND 1200 V D.C.
Hardcopy , PDF
08-31-1992
English
01-01-1982
Gives special requirements for position switches with positive opening operation. Describes characteristics and requirements relevant to positive opening break contact element(s) of position switch with positive opening operation. Position switches with positive opening operation shall comply with requirements of Part 1 of this standard, except Addition A II, also with supplementary requirements in this Section of Part 2. Contact elements within position switch, other than positive opening break contact element(s) shall comply with requirements fo Part 1 except Additions A I and A II.
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