rmpccm
Industrial
- Feb 17, 2021
- 1
Hello
I have a project, in which we want to perform a HI-POT and ground bond test on a cable assembly.
My issue is how to deal with safety of the HV relays.
Usually, I use contactors in series, with monitored (forcibly guided) contacts, to monitor safe condition, and that the load has indeed been switched off.
However, these contactors are only rated for 690 V, but easily hundreds of amperes. My issue is we need to break 4,5 kV DC (low amperes though). For this we use relays from SPS Electronics (RL-42), which are perfect for this.
And usually we do not monitor these relays, since the HIPOT connectors are inaccessible to the user. In this case, the user needs to access the tester, and connect these leads manually, hence we need to monitor the relays.
The relays are DPDT, and my idea was to use the second channel to monitor the relay position.
Is this a viable method to do this? Any other ideas on how to accomplish this task?
I have a project, in which we want to perform a HI-POT and ground bond test on a cable assembly.
My issue is how to deal with safety of the HV relays.
Usually, I use contactors in series, with monitored (forcibly guided) contacts, to monitor safe condition, and that the load has indeed been switched off.
However, these contactors are only rated for 690 V, but easily hundreds of amperes. My issue is we need to break 4,5 kV DC (low amperes though). For this we use relays from SPS Electronics (RL-42), which are perfect for this.
And usually we do not monitor these relays, since the HIPOT connectors are inaccessible to the user. In this case, the user needs to access the tester, and connect these leads manually, hence we need to monitor the relays.
The relays are DPDT, and my idea was to use the second channel to monitor the relay position.
Is this a viable method to do this? Any other ideas on how to accomplish this task?
