INS/INV single pole ratings

[PYE]

I know the specs for DC on the INS/INV compact/interpact range are for 2 poles in series <125VDC and 4 poles in series for 250VDC.

As we are moving into a lot of PV installations that are using 48VDC nominal Battery Banks (ESS) that are charging using voltages up to 59VDC, I was wondering if the INS/INV range can satisfy the 60VDC per single pole at their rated current. I know that from a certification point of view Schneider will answer no, however; I am going on the premise that the calculations used are infact the same as doubling the poles for 125VDC and 250VDC.

I know that in studies, the data shows that the arc generated is not linear to the VDC. If anyone has any experience in this field please do comment.

From everything I have read and from personal experience <48VDC is where things start to get more interesting.

Replies, more than welcome.

Regards

[Christian_Bach]

Hello @PYE ,

I guess there is absolutely no issue to run half of 125V on a single pole under IEC standard config. So 60V would be ok in theory.

Only potential concern is the time constant on battery systems which is usually much lower than "usual" DC applications (1ms).

What frame are you interested in ? Used as disconnector only, or switching capabilities needed ? 

Thanks.

Christian

[PYE]

What frame are you interested in ? Used as disconnector only, or switching capabilities needed ?

I would have to assume because PV circuits have to be designed in such a way that the maximum potential current can come from BOTH sides of the circuit either the PV or the Battery bank and that all switches must be rated for load break, that the answer to your question will be disconnection under LOAD.

regards

[Gregoire_Brun · Accepted solution]

Hello

I would suggest using one ComPacT NSX NA DC, because we have tested this product at 48V DC.