200 amp NC 240 AC Relay

[albertson]

I am looking for a 200 amp 240 volt AC Normally Open NO compact relay for a new device I am prototyping. Something similar in size to a car starter relay but 24 volt coil and normally closed. I will need to get UL listed so quality matters over cost.

 

[schmitt trigger]

As long as the coil is 24 volts AC, all of the major contactor manufacturers should offer them.
Eaton, Schneider, ABB, Danfoss, Fuji, Siemens, Potter & Brumfield and many others.
Although your Normally Closed requirements will narrow your choice.
Do a parametric search in industrial equipment distributors like Grainger.

 

[For The Popcorn]

Digikey, Mouser, RS or electrical suppliers as ST said above.

Yes, it is easier to con somebody into searching for you, but it's a skill you'll need to learn if you're going to market things.

 

[albertson]

Guys, I am an electrical engineer with a PE and have run Master Electrical Services LLC for 20 years.

Note that I stated that it needs to be the size of a car starter but here is a picture to help explain.

These are all normally open...... NO. As I stated, I need normally closed at 200 amps. Does not have to switch under load.

I have searched over 30 websites and contacted 4 MFGs asking if they would make one

Those who would like to help would be VERY much appreciated

 

[albertson]

A car starter solenoid.

 

[rjenkinsgb]

You have a typo in the question, which is probably causing some confusion..

I am looking for a 200 amp 240 volt AC Normally Open NO compact relay

I've seen industrial gear in the past, but it is getting rare, as the typical use was a brake contact for use with a large DC motor, to connect a brake resistor across the armature when it was stopped.

However, google can find some stuff;

These have both NO and NC 200A contacts:

https://www.amazon.co.uk/XIALITR-12V-48V-automotive-normally-starter/dp/B09Z64137Z?th=1

 

[albertson]

Thank you for the lead! It is getting closer to what I want. I do not need (or want) the NO part but for a test piece I could use it but need 24 VAC or 120 VAC. I checked the website (United Kingdom but that would be ok) but no longer available. I will try to track down the MFG to see if they can make one. Thinking of trying to take one apart and have a chassis 3D printed for normally closed. Any leads on some who does that would be appreciated.

 

[rjenkinsgb]

There are lots of variations, I just searched for a DC motor brake contactor again:

https://www.aliexpress.com/item/4000883809841.html?spm=a2g0o.detail.1000023.1.57f94749AAdLCH

 

[albertson]

Thank you! Great to know what to search for. They do have the NC model but out of stock. I will keep checking other suppliers now that I know what to search for.

Doug

 

[rjenkinsgb]

Have you tried the manufacturer of that one directly?

CZW Series DC Contactor--ZHEJIANG SAYOON ELECTRIC CO.,LTD. DC CONTACTOR HV DC CONTACT

CZW Series DC Contactor

www.sayoon.com