In Worksheets for AC Motor Control Circuits, Question 19:
The temperature switch is shown incorrectly. It should be a normally open switch. The connection of the switch on the circle to the right should not exist. The line should be above the circle on the right.
This represents failsafe design. If the switch fails, you do not want the temperature element to stay heated.
The temperature switch is shown incorrectly. It should be a normally open switch. The connection of the switch on the circle to the right should not exist. The line should be above the circle on the right.
This represents failsafe design. If the switch fails, you do not want the temperature element to stay heated.