AutoQuiz is edited by Joel Don, ISA’s social media community manager.

Today’s automation industry quiz question comes from ISA’s course, Electrical Controls for the Control Systems Technician (TI23). This course focuses on electrical controls that are thermal-and-magnetic-overloadsfrequently overlooked in a formal training program. It is geared toward any level technician who wants a thorough review of electrical process concepts to reinforce their knowledge of basic electricity and develop skills required to install and maintain electrical control devices.

What type of circuit break protection should be used for motor control?

a) non-automatic circuit interrupter
b) thermal
c) magnetic
d) thermal and magnetic
e) none of the above


Click Here to Reveal the Answer

Here’s the answer to today’s quiz from the instructor for ISA’s course offering, Electrical Controls for the Control Systems Technician (TI23).

The symbols in the post image are used to represent thermal and magnetic overload protection for electric motors. These two devices when used in series helps prevent excessive damage due to overheating and short circuiting.

The correct answer is D.



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