Contact type relays are used to connect control circuits and use relays similar to contactors such as arc extinguishing covers. The working principle of contact relay is the same as that of electromagnetic relay. The difference is that the electromagnetic relay connects the control circuit, with low current and no arc extinguishing. The contactor is connected to the electrical equipment, and there is an arc extinguishing device for high current. Contact relay is used to connect the control circuit, but the contacts use technology similar to contactors such as arc extinguishing caps, so it is called contactor relay
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