Trade of Electrician Motor Control COURSE NOTES - eCollege
Trade of Electrician Motor Control COURSE NOTES - eCollege
Trade of Electrician Motor Control COURSE NOTES - eCollege
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FAS Electrical Course Notes – Module 2.4.2<br />
Emergency Stop Button<br />
This is an emergency stop button and it differs from a standard stop button as follows:<br />
It has a large, easy to operate, mushroom shaped actuator.<br />
This actuator must be mounted on a yellow background.<br />
When operated, the actuator latches in the “Off “ position.<br />
The actuator is released by twisting the mushroom shaped head.<br />
Auto / Off / Hand Selector<br />
Figure 19<br />
This is a three position switch, having an “Off “position in the centre. When turned to the left, a<br />
normally open contact is closed. This operation selects an automatic function. When turned to<br />
the right, a different normally open contact is closed. This operation selects a manual or hand<br />
operated function.<br />
Figure 20<br />
19<br />
Revision 4. Feb 2009
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