Current Detectors For Mho Relay
Current Detectors For Mho Relay
(OP)
There is a phase current detector setting associated with the MHO distance relay we are having. This detector is used to enable (supervise) the MHO distance element.
What is the standard norm for setting this? Can a setting below the maximum line load current will be acceptable?
What is the standard norm for setting this? Can a setting below the maximum line load current will be acceptable?






RE: Current Detectors For Mho Relay
If you are having problems with weak in-feed, where the current at one terminal may not be sufficent to pickup your MHO relays, you should consiter a communications scheme to trip this terminal from another substation. This is as a supplement the the local MHO relays.
RE: Current Detectors For Mho Relay
Anybody who was involved with this are very welcome to provide their experience.
RE: Current Detectors For Mho Relay
RE: Current Detectors For Mho Relay
Use fault studies, phase to phase for phase units, to calculate settings. I'd try to use about 2/3 the calculated lowest fault current value or lower(Just a general guide).