600 VDC switches [RE-wrenches]

[Travis Creswell, Ozark Solar]

What can anyone tell me about the Cutler Hammer DH361URK for use with Sunny
Boy's?  It's a non-fused 3 pole 600 volt 30 amp Nema 3R safety switch.  My
local supplier sold it to me as a 600 VDC rated switch but the inside cover
says 250 volts.  I've asked him to contact CH about the DC rating if you
were to wire the three poles in series but have yet to hear back from them. 
My application will have a Vmp of less than 300 volts and a Ocv of less than
400.  Is it safe to assume that wiring the 3 poles in series will increase
the DC rating of any non fusible switch that starts out with a DC rating of
250? 


Thanks
Travis Creswell
Ozark Energy Services 

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