Electroswitch Smart Nameplate for coil monitoring
Electroswitch Smart Nameplate for coil monitoring
(OP)
I have recently become interested in adding coil monitoring to my utility's lockout relays. This seems like a simple but necessary thing to monitor, but I don't have a simple answer for it. While researching it, I came across a few options--one from Areva, one from ABB, and one from Electroswitch. All I am looking for is an alarm to SCADA in order to alert us of the condition, so I think that the Electroswitch Smart Nameplate on the lockout relay would be sufficient. It has a contact to alarm if the coil circuit is open. It also provides a true continuity check for the coil. Between this and a loss of DC relay I feel this will provide us with good coverage on our lockout relays. Does anyone have experience with this setup? Is there a better way that I am overlooking? While I don't like to do make work or over complicate things, I also don't want to be the one explaining that our protection didn't operate because of a failed lockout relay that could have been found and repaired before a fault. Any tips or insight is greatly appreciated.






RE: Electroswitch Smart Nameplate for coil monitoring
RE: Electroswitch Smart Nameplate for coil monitoring
RE: Electroswitch Smart Nameplate for coil monitoring
davidbeach -- when you say to put a relay input in series with the coil, are you referring to an input on a microprocessor relay (i.e. SEL) or a simple "ice cube" type relay?
RE: Electroswitch Smart Nameplate for coil monitoring
Of course, this only works when someone is there to see that the light is out, etc, etc, but it is very simple to implement.
"The perfect is the enemy of the good." -- Voltaire
RE: Electroswitch Smart Nameplate for coil monitoring
The light idea also works, but a device called a RAW relay from E-max also provides a contact.
RE: Electroswitch Smart Nameplate for coil monitoring
"The perfect is the enemy of the good." -- Voltaire
RE: Electroswitch Smart Nameplate for coil monitoring
Measuring at the lockout will tell you that the lockout coil is good. However, if you measure at the protective relay location, you will also be measuring more of the whole circuit.
Probally more of a concern for long circuit paths.
RE: Electroswitch Smart Nameplate for coil monitoring