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Breaking negative DC twice in disconnect
Rob, Thank you for your reply and looking it up! The inverter is an ABB PVS175 - US version. I tried putting in the link but it would not allow. I think that they were referring to is UL 1699B, UL Standard for safety Photovoltaic DC Arc-Fault Circuit Protection. That reference is used in the...- suttonnc
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- Forum: Solar PV Forum | Solar Panels Forum
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Breaking negative DC twice in disconnect
Hello all, We have a 175 Kw 1500Vdc string inverter. It has 12 mppt channels with 2 inputs each. Each channel (you can have 1 or 2 strings per "chanel") has 1 DC contactor for the positive and 2 DC contactors for the negatives. Does anyone know the specific UL requirements for this and where to...- suttonnc
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- Replies: 5
- Forum: Solar PV Forum | Solar Panels Forum
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1 DC+, 2 DC-.PNG
- suttonnc
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- Category: Professional Electrician
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