Residual Voltage Devices
Residual Voltage Devices
(OP)
Can anybody tell me how a residual voltage device operates. I know how a residual current device (RCD) operators, but not a residual voltage device.
Cheers
Cheers
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RE: Residual Voltage Devices
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If we learn from our mistakes I'm getting a great education!
RE: Residual Voltage Devices
Thanks for the reply.
We are currently reviewing the earthing requirements for generators in surface coal mines (Queensland, Australia) and a discussion paper has come to us from our counterparts from another Australian State where they talk about single phase generators with voltage sensing relays. None of the members of our group have had experience with them as they appear to be rarely used. The connection diagram in the paper shows the earthing system is of the isolated type ie earth is not connected to the neutral conductor.
RE: Residual Voltage Devices
I would use a standard RCD of the type you're familiar with - you can selectively apply them to individual circuits, you can achieve at least one level of coordination by time if necessary, and there isn't an inherent way of inadvertently defeating the protection.
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If we learn from our mistakes I'm getting a great education!