Contact voltage ratings

[ptonsparky]

Yes, I’m supposed to be retired.
Noticed yesterday a Schneider TDR output contacts were switching a 480 volt coil on a size 4 PP. I had more urgent items so i put it on the back burner. I’ve only seen it once before on a cube relay that apparently had worked for years.
Slight hum on the pp starter.. Guessing we will eventually put in an interposing relay. Would a suppresion device on the coil help in the meantime?

 

[ptonsparky]

CH distributor just went ‘Huh?’
I know it needs a proper interposing relay.
I’ll get down there again eventually, maybe I have something left over in my good stuff.

 

[ptonsparky]

Farmer says, wait until it breaks. Sounds good to me but I don't buy until it's needed.

 

[augie47]

Educate me ! Why would the interposing relay be needed. The TDRs we use have a 10 or 12 amp contact rating.

 

[ptonsparky]

Educate me ! Why would the interposing relay be needed. The TDRs we use have a 10 or 12 amp contact rating.

TDR has a 240 volt contact rating. Not 480 volt.

 

[augie47]

TDR has a 240 volt contact rating. Not 480 volt.

Got it ! Overlooked that in the original post.

 

[JoeStillman]

Won't be a problem until the contacts (try to) open.

 

[ptonsparky]

Won't be a problem until the contacts (try to) open.

Amazingly, this TDR has worked for at least one season. Still is.

 

[gadfly56]

CH distributor just went ‘Huh?’
I know it needs a proper interposing relay.
I’ll get down there again eventually, maybe I have something left over in my good stuff.

Schneider has a TDR Pro series that looks like it has the components necessary to do what is needed, but this is not an area of expertise for me.

https://download.schneider-electric..._enDocType=Catalog&p_File_Name=8501CT1104.pdf

 

[ptonsparky]

A Schneider is what they have. The contacts are rated for 240 volt operation, not 480.

 

[gadfly56]

A Schneider is what they have. The contacts are rated for 240 volt operation, not 480.

Yes, but if you go to the accessory page, there is a 70-750E8-1 that is rated for 600 volts. I'm just not sure how the parts go together.

 

[ptonsparky]

Yes, but if you go to the accessory page, there is a 70-750E8-1 that is rated for 600 volts. I'm just not sure how the parts go together.

I'll look closer when I get to a computer. Cell phones aren't that great for details.

Thanks.

 

[ptonsparky]

Yes, but if you go to the accessory page, there is a 70-750E8-1 that is rated for 600 volts. I'm just not sure how the parts go together.

That is the Base for the TDRPRO-5101 the customer should have.
Good find, I would not have thought that contact volt rating was available at all.
(It isn't locally)