Thermal overload relays are used to protect the motor against over current due to____________?
Correct answer: B. heavy loads
- A. short-circuits
- B. heavy loads
- C. grounds
- D. all of the above
Explanation
Thermal overload relays respond to heating caused by sustained overcurrent, typically when a motor is carrying a heavy load. Short-circuit protection is normally provided by fuses or magnetic circuit-breaker trips.
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