BS EN 60947-5-4:2003+A1:2019 Low-voltage switchgear and controlgear - Control circuit devices and switching elements. Method of assessing the performance of low-energy contacts. Special tests
1 Scope and object
This part of IEC 60947 applies to separable contacts used in the utilization area considered, such as switching
elements for control circuits.
This standard takes into consideration two typical rated voltage areas:
a) above (and including) 10 V (typically 24 V) where contacts are used for switching
loads with possible electrical erosion, such as programmable controller inputs;
b) below 10 V (typically 5 V) with negligible electrical erosion, such as electronic
circuits.
This standard does not apply to contacts used in:
– functional safety area. In case of contacts used in functional safety area, Annex N
of IEC 60947‑5‑1:2016 applies;
– very low energy area of measurement, for example, sensor or thermocouple systems.
The object of this standard is to propose a method of assessing the performances of
low energy contacts giving
– useful definitions;
– general principles of test method...
BS EN 60947-5-4:2003+A1:2019 history
2019BS EN 60947-5-4:2003+A1:2019 Low-voltage switchgear and controlgear - Control circuit devices and switching elements. Method of assessing the performance of low-energy contacts. Special tests
2003BS EN 60947-5-4:2003 Specification for low-voltage switchgear and controlgear. Control circuit devices and switching elements. Method of assessing the performance of low-energy contacts. Special tests