Earth faults in PM866 controllers.
I am carrying out commissioning for a ship's automation system. Right now we have installed brand new PM866 controllers onboard the vessel.
However the shipyard technicians are complaining that the cabinet in which the controllers are installed is having earth fault due to 24V DC negative terminal being grounded and the
Controller is the one which is behind the earth fault. ha anyone faced similar kind of issues before, can anyone give me a suggestion. ?
However the shipyard technicians are complaining that the cabinet in which the controllers are installed is having earth fault due to 24V DC negative terminal being grounded and the
Controller is the one which is behind the earth fault. ha anyone faced similar kind of issues before, can anyone give me a suggestion. ?
Asked 3 months ago
Voted best answer
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Hi,
I believe that PM866, if it isn't defective, has no internal connection of positive or negative +24VDC terminals to the ground.
We have an installations with earth fault monitoring devices on 24VDC (with integrated function in the rectifier unit) and don't have such a problem.
You can easy measure that or just disconnect the connectors to the processor one by one and check if such a problem exists.
I believe that PM866, if it isn't defective, has no internal connection of positive or negative +24VDC terminals to the ground.
We have an installations with earth fault monitoring devices on 24VDC (with integrated function in the rectifier unit) and don't have such a problem.
You can easy measure that or just disconnect the connectors to the processor one by one and check if such a problem exists.
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