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0V of 24 V SUPPLY GROUNDED

0V of 24 V SUPPLY GROUNDED

0V of 24 V SUPPLY GROUNDED

(OP)
We are operating with a T-N system and the negative of our 24 V supply is not grounded. I intend to earth the negative and bring it to ground potential.
Are there any constraint in doing that /

Bob

RE: 0V of 24 V SUPPLY GROUNDED

The fact that your mains is tied to ground does not change anything with respect to the 24 V system. You can do whatever you want with the 24 V minus pole.

Gunnar Englund
www.gke.org

RE: 0V of 24 V SUPPLY GROUNDED

For 24 VDC control power, some installations like to float the  DC power and alarm if a ground fault is detected on the + or - bus.  This prevents loss of control power on the first ground fault and minimizes teh chance of battery discharges through inadvertant grounds.

RE: 0V of 24 V SUPPLY GROUNDED

Right. But that is a choice that is independent of the mains being IT or TN.So, you can do what you want with the DC supply - not dependent on mains.

Gunnar Englund
www.gke.org

RE: 0V of 24 V SUPPLY GROUNDED

Sometimes I see people trying to completely keep the 24VDC isolated if it is running brushed servo motors.  They optically isolate everything in sight.

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