347 volts on 120 volt HPS Ballast tap

[powerplay]

I was changing 250 Watt HPS Wall Packs on an Warehouse to LED Wall Packs, and found that the existing ones were connected to the 120 volt tap. Is the overvoltage likely to cause premature failure and overheating causing a fire? ... or simply trip a breaker..

 

[K8MHZ]

What kind of system has 347 volts?

 

[ActionDave]

I was changing 250 Watt HPS Wall Packs on an Warehouse to LED Wall Packs, and found that the existing ones were connected to the 120 volt tap. Is the overvoltage likely to cause premature failure and overheating causing a fire? ... or simply trip a breaker..

Something like one of those. Premature failure would be my first guess.

 

[jumper]

What kind of system has 347 volts?

Common Canadian system. Some US applications. WYE setup 600Y/347.

 

[K8MHZ]

Common Canadian system. Some US applications. WYE setup 600Y/347.

Thanks. Now I understand.

 

[kwired]

Did they actually work? I've seen 150 watt MH only last for a few minutes when 208 was applied to the 120 tap by someone that didn't pay attention to connections before changing a ballast.

 

[powerplay]

Did they actually work? I've seen 150 watt MH only last for a few minutes when 208 was applied to the 120 tap by someone that didn't pay attention to connections before changing a ballast.

I am not certain how long they have been connected that way. but some were working and I'm certain if they were blowing really quick I would have heard about it.