Trade of Electrician Motor Control COURSE NOTES - eCollege
Trade of Electrician Motor Control COURSE NOTES - eCollege
Trade of Electrician Motor Control COURSE NOTES - eCollege
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
FAS Electrical Course Notes – Module 2.4.2<br />
Start Button<br />
A start button consists <strong>of</strong> a green coloured actuator, which when pressed operates a normally<br />
open contact. On pressing the green actuator the normally open contact will close. These are<br />
fitted on the panel door via a mounting collar. The actuator is fitted through a suitable hole in<br />
the panel door. A rubber washer is used on the outside to provide ingress protection. The<br />
actuator is locked into the collar. The collar is secured to the panel door by a screw. This action<br />
compresses the rubber seal on the actuator. Finally the contact block is simply clipped on to the<br />
collar. See Figure 17.<br />
Colour<br />
and / or<br />
symbol<br />
to indicate<br />
function<br />
Stop Button<br />
Figure 17<br />
A stop button consists <strong>of</strong> a red coloured actuator, which when pressed operates a normally<br />
closed contact. On pressing the red actuator the normally closed contact will open.<br />
See Figure 18<br />
Colour<br />
and / or<br />
symbol<br />
to indicate<br />
function<br />
Actuator<br />
Rubber<br />
Seal<br />
Actuator Rubber<br />
Seal<br />
Figure 18<br />
18<br />
Mounting<br />
Collar<br />
Mounting<br />
Collar<br />
N / O<br />
Contact<br />
Block<br />
N / C<br />
Contact<br />
Block<br />
Revision 4. Feb 2009
Change language