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kokaruu avatar image
kokaruu asked

Multiplus 1600va DC grounding.

Hi, when installing a Multiplus 12/1600/70, does it need DC grounding from chassis to DC negative? It's a fixed UPS installation, so ground is already provided by grid AC in.

I can't find anywhere in the manual for the multiplus 1600va, where it is mentioned if and how DC grounding should be done. And the circled information for what i assume is the chassis ground lug, seems rather strange, I actually don't understand exactly what it means.
What is "chassis on input/output ground terminals" ?

I assume it means that chassis is connected to input/output ground and should have permanent "uninterruptable" ground connection? Which then in my case is already provided by fixed AC in.

Edit: And probably just a spelling mistake "on" Should be "or".

multiplus.png^ Appendix: B of Multiplus 1600va Manual


This example shows DC grounding.1600va-example.png

Grounding
1600va-example.png (643.1 KiB)
1679512910248.png (79.7 KiB)
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1 Answer
Jons Collasius avatar image
Jons Collasius answered ·

As stated in the manual:
Uninterruptible protective grounding must be provided at the AC input and/or output terminals and/or chassis grounding point located externally on the product.
No other grounding is needed if AC in is uninterruptible connected to earth/ground.

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kokaruu avatar image kokaruu commented ·

So just to be clear, I don't have to ground to my battery negative terminal in the setup shown below? Is this only when additional DC components are added?


simple-multiplus-backup-power.png

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