Trying to source a 16A relay

[Vladpl]

Hello All

I am having great trouble finding a relay that is "double pole double throw(changover) 16A inductive ( not resistive like most relay )with a 240V coil.

Since I am situated in Melbourne Australia I have contacted almost any supplier in AUS and am quickly going to run out of options. Closest I have come in sourcing these was to use a "contactor relay" which are very expensive $200 each while normal relays are around the $50 mark. So if anyone could help me with this I would be very gratefull. Thank you all in advance.

Vlad

 

[ScottyUK]

Give us the full spec: are we talking about an AC or DC load? 16A at 240V DC is pretty severe duty; 16A at 240V AC is trivial. Also is the coil AC or DC?


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One day my ship will come in.
But with my luck, I'll be at the airport!

 

[Vladpl]

Relay coil is to be 240V AC. Load will be 16A at 240V AC.
The load will be inductive.

It is easy to find a relay that is 16A and is going to operate DC loads ie. resistive loads. but when it has to operate inductive loads AC there is a derating factor and 16A relay would handle max 3A inductive loads ie. such as AC motors.

 

[ScottyUK]

One example would be the Siemens 3RT13 range

http://www.sea.siemens.com/icc04/sec03/03-027.pdf

These contactors have proved very robust in applications where I've used them previously. You would be looking at the S0 frame size for your application. I would be appalled to pay $200 for one of these, even at current exchange rates. In the UK I would expect to be in the £50 ballpark. Equivalents would be available from A-B, Schneider (Square D / Telemecanique), etc.

Is there some reason you can't use two standard N/O relays and drive them in antiphase? This might be easier if you are trying to minimise cost and space. IMO's GY series of relays look like they might be suitable too, based on a quick look in their catalogue. Up to 7500VA inductive load, and the N/C contact doesn't appear to have a smaller rating than the N/O contact.


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One day my ship will come in.
But with my luck, I'll be at the airport!

 

[fangas]

Try These

Potter & Brumfield PRD Series

http://relays.tycoelectronics.com/datasheets/PRD_DS.pdf

OR
Omron MGN Series

http://oeiwcs.omron.com/webapp/commerce/command/ProductDisplay?prrfnbr=634&prmenbr=316

Ed