Question 80Electricity & Electronics - Assistant Engineer

The correct answer is D) cool the motor with portable blowers and fans. In an emergency situation where overloading an electric motor becomes necessary, the best approach to prevent damage is to provide adequate cooling to the motor. Overloading a motor can cause it to generate excessive heat, which can lead to winding insulation failure and other serious issues. By using portable blowers or fans to cool the motor, you can help dissipate the excess heat and allow the motor to operate safely under the increased load. The other options are not the best solutions. Increasing the residual magnetism (A) would not directly address the heat buildup, and holding thermal overload relays open (B) or injecting CO2 (C) could potentially create other safety hazards or damage the motor. Cooling the motor with airflow is the most effective and safest way to manage the emergency situation.