The electromagnetic power main switch is actually an electromagnetic suction switch. Two of the four connectors are connected directly to the positive and negative terminals of the battery through a mechanical manual switch (the two wires must not pass the electromagnetic main switch). When the switch is turned on, the battery current will pass. The electromagnetic valve of the electromagnetic main switch generates a magnetic field (this should be able to hear 'pa'), and the contacts in the electromagnetic main switch are connected under the suction of the magnetic field.
This switch is actually a large relay.
There are four wires in total: one is a ground wire, the other three are two positive poles, one is a battery, the other is a switch, and the other one is the three. The electricity that produces the magnetic field output, this is the electromagnetic switch!
Precautions for use,
1. The battery voltage must be recognized before installation and should be consistent with this product. (ie 12V, 24V points)
2. If the product is used normally, it should be turned on before starting, and then turned off after stopping the fire.
3. During the normal running of the vehicle, it is not allowed to turn off the relay at will, so as to avoid the sudden change of the no-load voltage of the generator and the burning of the electrical equipment.
4. the best installation location: choose to rely on the frame near the battery, to shorten the power cord is appropriate.