Hi,
I've designed a basic circuit to allow the automatic switching of input when connecting to an external source. Let me explain a bit better; I have a van that I am converting to a camper. It has a consumer unit that I want to be able to supply from either the inverter or an external source (hook up). So instead of having switches that need to be manually operated, I have designed a circuit that takes the input AC voltage as the latching power to a 3PDT ac relay. The relay I'm using is JQX-38F series -40A-AC1.Here is the link to the relay I bought.
http://www.amazon.co.uk/gp/product/B009N7WVM6?psc=1&redirect=true&ref_=oh_aui_detailpage_o05_s00
The relaxed position connects the inverter to the consumer unit. There are no other components in the circuit. When I connected the external source, the relay 'chattered' so loudly it sounded more like a dentists drill! Its as if the relay is a DC coil relay, but it has actually got AC220V written on the coil. The supply is 240Vac; could this be the problem?
I thought that maybe I could put a diode between the coil inputs.
Has anyone got any ideas or have i missed something obvious?
I've designed a basic circuit to allow the automatic switching of input when connecting to an external source. Let me explain a bit better; I have a van that I am converting to a camper. It has a consumer unit that I want to be able to supply from either the inverter or an external source (hook up). So instead of having switches that need to be manually operated, I have designed a circuit that takes the input AC voltage as the latching power to a 3PDT ac relay. The relay I'm using is JQX-38F series -40A-AC1.Here is the link to the relay I bought.
http://www.amazon.co.uk/gp/product/B009N7WVM6?psc=1&redirect=true&ref_=oh_aui_detailpage_o05_s00
The relaxed position connects the inverter to the consumer unit. There are no other components in the circuit. When I connected the external source, the relay 'chattered' so loudly it sounded more like a dentists drill! Its as if the relay is a DC coil relay, but it has actually got AC220V written on the coil. The supply is 240Vac; could this be the problem?
I thought that maybe I could put a diode between the coil inputs.
Has anyone got any ideas or have i missed something obvious?