The higher the coil voltage of the Cheapest AC contactor, the greater the coil resistance of the Cheapest AC contactor. The higher the rated current of the Cheapest AC contactor, the smaller the coil resistance of the Cheapest AC contactor.

When the Cheapest AC contactor coil voltage is 220V, the Cheapest AC contactor coil resistance is about 500Ω. When the Cheapest AC contactor coil voltage is 24V, the Cheapest AC contactor coil resistance is several tens of Ω.

To measure the Cheapest AC contactor coil, the resistance gear of the multimeter is usually used, and the red and black test pens are used to measure the coils A1 and A2. When the measured resistance value is close to the estimated value, it proves that the Cheapest AC contactor coil is normal. When the measured resistance is infinite, it proves that the coil is broken and damaged. When the measured resistance value is 0, or a few ohms, it proves that the Cheapest AC contactor coil is damaged by short circuit. Cheapest AC contactor coil is more likely to be damaged by open circuit than by short circuit.