UNE-EN IEC 60947-5-8:2021
Current
The latest, up-to-date edition.
Low-voltage switchgear and controlgear - Part 5-8: Control circuit devices and switching elements - Three-position enabling switches
Hardcopy , PDF
Spanish, Castilian, English
22-12-2021
This part of IEC 60947 series specifies requirements for three-position enabling switches.
These switches are used as components of enabling devices to provide signals that,
a) when activated, allow machine operation to be initiated by a separate start control, and
b) when de-activated,
" initiate a stop function, and
" prevent initiation of machine operation.
NOTE 1 The enabling control function is described in 9.2.3.9 of IEC 60204-1:2016 but the application of three- position enabling switches is not limited to a component of the enabling device described in IEC 60204-1.
NOTE 2 This document does not deal with enabling devices.
These switches are intended to be connected to circuits which rated voltage does not exceed 250 V AC 50 Hz/60 Hz or 300 V DC.
EXAMPLE Devices incorporating three-position enabling switches are:
- push-button enabling devices;
- grip actuated enabling devices;
- foot actuated enabling devices.
See Annex A for more typical examples.
This document 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).
| Committee |
CTN 201/SC 121AB
|
| DocumentType |
Standard
|
| Pages |
37
|
| PublisherName |
Asociación Española de Normalización
|
| Status |
Current
|
| Standards | Relationship |
| BS EN IEC 60947-5-8:2021 | Equivalent |
| DIN EN IEC 60947-5-8:2021-08 | Equivalent |
| EN IEC 60947-5-8:2021 | Identical |
| IEC 60947-5-8:2020 | Identical |
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