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50/51N Stands for what ?
- Thread starter Elecme
- Start date
It is a relay with time overcurrent (ANSI/IEEE Device 51) and instantaneous overcurrent (ANSI/IEEE Device 50)functions connected to the neutral (or residual) of wye-connected CTs.
A 50/51N relay can be set more sensitively than the same relay connected directly to phase current because it only senses zero sequence currents (i.e., unbalanced phase to neutral loads or ground faults).
A 50/51N relay can be set more sensitively than the same relay connected directly to phase current because it only senses zero sequence currents (i.e., unbalanced phase to neutral loads or ground faults).
redtrumpet
Electrical
See thread279-10208
Scroll down the thread, the device numbering Q and A appeared near the bottom of the thread.
Scroll down the thread, the device numbering Q and A appeared near the bottom of the thread.
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