Energized Warning Light

[spikes2020]

I am looking if anyone has a solution to my problem.

We have an energized equipment with roughly 2,000V DC that has water cooling loops attached to it. This is construction equipment out in the field. The water loop is a DI system that is closed loop.

The problem we had was one of the hoses had metal brading as the manufacture shipped the wrong ones. This energized the pump panel that smoked a hose.

I am looking for a device that can detect a voltage potential gerater than 50V to 2000V DC between the equipment and ground. If it could have a switch/relay that i could have tied into the power source that would also be helpful.

My main problem right now is finding something that is rated for 2000V DC.

I am looking at a ground fault detector and putting a CT on the positive and negative leads. Then tripping the main if too much stray current is detected. But we are dealing with large amounts of current so i think maybe a voltage detection would be less nussance tripping and more practical. So just to detect a voltage differential between any equipment and the ground.

I have grounded all the equipment here maybe putting CTs on the ground cables and looking for currents on that? I am going with a Star grounding pattern where each pice of equipment is grounded and brought back to the source, so putting a CT on that main ground?

I am worried about nussance tripping and want something that will be reliable in the field. So i feel voltage detection would be the ideal way to go.

Thoughts?

 

[retirede]

It’s not clear to me what you are trying to do, but CTs won’t function on DC current.
There are DC current sensors that are somewhat equivalent to- look at Hall-effect sensor, for example. Or perhaps a simple shunt could work?

 

[spikes2020]

It’s not clear to me what you are trying to do, but CTs won’t function on DC current.
There are DC current sensors that are somewhat equivalent to- look at Hall-effect sensor, for example. Or perhaps a simple shunt could work?

I am trying to see if we have stray current or something else getting energized on site. There are lots of cables and hoses attached to this one energized peice of equipment. We are putting check in to make sure this dosen't happen agian, but having detection on the other supporting equipment trailers to see if they are getting energized would be really helpful.

Any DC voltage dectection equipment i've found has all been 1kv or less.

Something like this ore better maybe?


PS its not pure DC current it has some AC componet as its generated via IGBTs, but yeah CTs might not be the way to go.

 

[GoldDigger]

I am trying to see if we have stray current or something else getting energized on site. There are lots of cables and hoses attached to this one energized peice of equipment. We are putting check in to make sure this dosen't happen agian, but having detection on the other supporting equipment trailers to see if they are getting energized would be really helpful.

Any DC voltage dectection equipment i've found has all been 1kv or less.

Something like this ore better maybe?


PS its not pure DC current it has some AC componet as its generated via IGBTs, but yeah CTs might not be the way to go.

Clamp-on detectors for DC metering using Hall Effect sensors are more expensive than transformer-based AC clamp-on sensors. Their accuracy can be very good, as long as attention is paid to the causedsof zero-shift from local magnetic fields.
Use of a clamp-on or split core DC sensor would let you enclose the pair of wires with additional insulation and shielding which could allow use of a sensor rated for less than 2000V DC.
This would also be far more sensitive than putting Hall Effect sensors in series with each lead and measuring the difference.