A beginner’s question regarding the voltage of intermediate relays
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I have a rather simple question: For an intermediate relay whose main contacts operate at DC24V, can its output normally open and normally closed contacts (dry contacts) be connected to a circuit operating at AC220V? Thank you!
For intermediate relays, what needs attention is the coil voltage, that is, the operating voltage applied to the relay coil； For intermediate relays, it is important to pay attention to the contact capacity of their contacts, that is, the voltage and current at which those contacts are turned on and off; under such voltage and current levels, the contacts should not get damaged (through sparking or melting). .
The 24V contacts of the coil can handle 220V, but it is necessary to ensure that the current is below the requirements specified for the relay
Post the model number; the parameters in the relay’s datasheet will be clear at a glance.
Check the contact current and voltage capacity requirements; that 24V DC is likely the coil voltage. Intermediate relays don’t have the concept of main and auxiliary contacts.
It can be connected. Make sure the load does not exceed the current specified for the relay. For this, you need to check the parameters above. For loads over 10A, a contactor should be used.
As long as there is no smoke after power is supplied, everything is fine
Main contact? What main contacts does an intermediate relay have? The contacts of the vast majority of intermediate relays support AC220V/DC24V. What you need to pay attention to is the coil voltage; you must not get this wrong, otherwise it will smoke.
It is not recommended to accept it. A contactor is recommended for 220V