Dale001289
Senior Member
- Location
- Georgia
Has anyone out there 're-set' a SEL-751 protective relay after a fault or temp power outage? I always thought the functions would 'auto-reset' once power was restored.
The settings in a 751 shouldn't be reset because of a loss of power. They required passwords to be modified and changed. The settings are usually written to the device with SEL Software.
From my memory, there is a 4 pin or a 6 pin behind the front cover that can be used to bypass the login? Maybe there is a system reset there as well?
I haven't worked on protection systems in a while.
It depends on the function and how it was programmed. There are times when you want the relay to stay in a 'locked out' condition until a specific reset command is received. This safety feature is not overridden by a simple power cycle.Has anyone out there 're-set' a SEL-751 protective relay after a fault or temp power outage? I always thought the functions would 'auto-reset' once power was restored.
I deal with 751 relays about once a week.Has anyone out there 're-set' a SEL-751 protective relay after a fault or temp power outage? I always thought the functions would 'auto-reset' once power was restored.