Hello,
We are to build a panel where there is two externat power supplies for redundancy. 400V 20 Ampere. One primare and one seccondary.
If the primary suply is out our system shall automatically switch to the secondary.
Is this as easy as two contactors and one voltage monitor relay or is there something of the shelf? A contactor with 3NO and 3NC would be nice.
We are to build a panel where there is two externat power supplies for redundancy. 400V 20 Ampere. One primare and one seccondary.
If the primary suply is out our system shall automatically switch to the secondary.
Is this as easy as two contactors and one voltage monitor relay or is there something of the shelf? A contactor with 3NO and 3NC would be nice.