Solenoid Valve Coil for HYUNDAI Excavator R210-5 R220-5

Causes of temperature rise of solenoid valve coil

1.When the current flows through the electromagnetic coil, it will heat up and the temperature will gradually increase. After a certain period of time, heating and heat dissipation are in balance, and the temperature reaches a stable value. The difference between this temperature and the ambient temperature is called temperature rise.

2.The temperature rise of solenoid valve coil is normal. The higher allowable temperature rise is determined by the insulation type of the coil, and the temperature rise of the electromagnetic coil should be lower than the higher allowable temperature rise. The ambient temperature of the solenoid valve is determined by the higher allowable temperature of the insulation type of the coil and the temperature rise of the solenoid valve coil. The speed brand universal solenoid valve coil uses B insulation. If the ambient temperature is not higher than 60 degrees, the temperature rise of the solenoid coil should not exceed 70 degrees.

3.(Class B insulation type: the higher allowable temperature rise is 90 degrees, and the higher allowable temperature is 130 degrees). Use the meter to measure the resistance of the solenoid valve. The resistance of the coil should be about 100 ohms! If the infinite resistance of the coil indicates that it is broken, you can also electrify the solenoid valve coil and put iron products on the solenoid valve, because the solenoid valve has magnetic properties to attract iron products after electrifying the solenoid valve coil. If you can hold the iron product, it means that the coil is good, otherwise it means that the coil is broken. The detection method of short circuit or open circuit of solenoid valve coil is to measure its on-off with multimeter first, and the resistance value approaches zero or infinity, which means that the coil is short circuit or open circuit.

4.If the measured resistance is normal, it doesn't mean that the coil must be good. You should also find a small screwdriver near the metal rod passing through the solenoid valve coil, and then electrify the solenoid valve. If it feels magnetic, then the solenoid valve coil is good, otherwise it is bad.