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IEC 60947-5-8

Low-voltage switchgear and controlgear – Part 5-8: Control circuit devices and switching elements – Three-position enabling switches

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Organization: IEC
Publication Date: 1 October 2006
Status: active
Page Count: 50
ICS Code (Low voltage switchgear and controlgear): 29.130.20
scope:

This part of IEC 60947 specifies requirements for three-position enabling switches.

These switches are used as components of enabling devices described in 10.9 of IEC 60204-1 to provide signals that,

a) when activated, allow machine operation to be initiated by a separate start control, and

b) when de-activated,

   i) initiate a stop function, and

   ii) prevent initiation of machine operation.

NOTE 1 The enabling control function is described in 9.2.6.3 of IEC 60204-1.

NOTE 2 This standard does not deal with enabling devices.

This standard does not apply to:

− three-position enabling switches for non-electrical control circuits, for example hydraulic, pneumatic;

− enabling switches without three-position mechanism;

− emergency stop devices (see IEC 60947-5-5).

 

Document History

IEC 60947-5-8
October 1, 2006
Low-voltage switchgear and controlgear – Part 5-8: Control circuit devices and switching elements – Three-position enabling switches
This part of IEC 60947 specifies requirements for three-position enabling switches. These switches are used as components of enabling devices described in 10.9 of IEC 60204-1 to provide signals...

References

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