Creating a 300Vdc breaker

[littleharbor2]

Hope this isn't a dumb question. I have quite a few 150 Vdc Midnite breakers. I notice the 300 volt spec breakers look like two of the 150's, series wired. Can I do this with these 150's I have or is there more to it than that?

[Wizbandit]

You probably could but I wouldn't.  The 300V 2 pole breakers are internally "ganged" so they trip at exactly the same time.  Just tieing the handles on 2 of the 150's might not open exactly at the same time and the microseconds may cause an arc to slowing burn the contacts on the one.  Over time it will get ugly I'm sure.  Check out our new 300V 1-pole breakers that replace the 2-pole units.

[littleharbor2]

You probably could but I wouldn't.  The 300V 2 pole breakers are internally "ganged" so they trip at exactly the same time.  Just tieing the handles on 2 of the 150's might not open exactly at the same time and the microseconds may cause an arc to slowing burn the contacts on the one.  Over time it will get ugly I'm sure.  Check out our new 300V 1-pole breakers that replace the 2-pole units.

Makes sense, Thanks.
I will take a look,

[littleharbor2]

Wow! thaw's great. Cheaper than two 150 Vdc breakers anyway and space saving. Too cool!