plc noob
Member
I have 2 panels for 1 large system. The panels are side by side but the only physical connection between them is 4 1” chase nipples. Panel 1 is fed from the mcc to a isolation transformer which the output of the isolation transformer feeds panel 1. Panel 1 has 3 ground bars that all tie into 1 ground block at the panel disconnect area and connect with the feeder ground from the isolation transformer. The isolation transformers ground connects to the primary side ground which goes all the way back to the mcc. Panel 1 has a paint free steel interior panel which multiple drives are mounted to.
Panel 2 is also fed from the same mcc but does not go through a isolation transformer it’s ground bars also connect to it’s feeder ground t one point near the disconnect.
We are having some noise related issues with the drives and the manufacturer wants us to ground the drive panel to building steel. The machine that both panels feed and control is already connected to building steel.
My question is should both panels be connected top building steel individually or should one panel be connected to building steel and a ground wire ran through the chase nipples and both panels bonded together by means of their ground bars?
Or any other or better method for noise reduction.
Panel 2 is also fed from the same mcc but does not go through a isolation transformer it’s ground bars also connect to it’s feeder ground t one point near the disconnect.
We are having some noise related issues with the drives and the manufacturer wants us to ground the drive panel to building steel. The machine that both panels feed and control is already connected to building steel.
My question is should both panels be connected top building steel individually or should one panel be connected to building steel and a ground wire ran through the chase nipples and both panels bonded together by means of their ground bars?
Or any other or better method for noise reduction.