SOI/DT 2006-01 dmm 34/71 599 37 47-13
5.2 Push-button
5.2.1 General characteristics
Single-button versions are used.
These differ as regards the number and functionality of the contacts:
- switch
- deviator (single- or two-pole)
5.2.2 Electrical symbol
Normally-closed switch
Normally-open switch
Deviator
5.2.3 Checking for efficiency
DOES NOT POWER THE APPLIANCE OR DOES NOT PERFORM THE SPECIFIC FUNCTION:
- Use a tester to check for correct closure (or aperture) of the various contacts.
- Press the button and check for switching of the contacts.
IMPOSSIBLE TO ACTION THE BUTTON
- Check that the spindle is not broken and that there are no other mechanical problems
(friction/breakage of couplings to crosspiece)
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