What Intermediary Relay Should be Used?

[jeffl012]

We have an AccuEnergy EV390 energy meter. We're trying to determine what is the most suitable "Intermediary Relay" (see page 19 for specs) to use in order to latch a Packard C440A 24v coil, 3 phase contactor. The meter has a nice built-in auxiliary power supply that can be used to drive the intermediary relay (see page 14-15 for specs). Can anyone help recommend a good relay for this use case?
Any help is much appreciated!

 

[JG2828]

I don't see a power supply output on page 14-15. That is the internal power supply for the relay.
It appears that the meter has a relay output capable of 250vac/30vdc and 5A. I don't think you would need an intermediary relay to drive that contractor, but the link doesn't show the coil ratings so I couldn't say for sure.
If you really need a intermediary relay, you could go with something like a KRPA relay.

https://www.alliedelec.com/product/te-connectivity/krpa-11ag-24/70199261/

Don't forget to buy the socket also.

 

[jeffl012]

Sorry, you're correct. Wrong reference. According to the spec sheet, the power supply operating range that could be used to drive the relay is: 100~240Vac, 50/60Hz; 100~300Vdc.

 

[jeffl012]

Thanks for your help JG2828!
FYI, according to the manufacturer, internal relay has no coil inside (it's a dry switch). They also insist to use an intermediary relay. They said the switch you recommended was fine, but it should be a 5A break current vs 10A.