Question: How does the weak current relay control the work of high-current electrical appliances?
Demand scenario: 4 network relays (MODBUS protocol, 10A relay contacts), hope the network relay can control the on and off of electric fans, 200W lights, and 2P air conditioning equipment. Because these appliances have high-current working loads like air conditioners, the 10A relay contacts will definitely not be able to stand it. I have also consulted the contactor, but the contactor can be connected to a large current load, but it cannot be passed through for a long time (such as an air conditioner working for a long time). I have also seen the remote control air switch (the cost is over budget, give up).
Is there any way to realize this application scenario?
Evans 发表于 July 22, 2020
Use a small-capacity relay to control a large-current relay or AC contactor.
Tavares 发表于 July 22, 2020
The contactor itself is used to switch large loads, why can't it be long-term high current?
Wells 发表于 July 22, 2020
There is a 30A relay, so it won’t burn out.
