Sepam 40: ANSI 50N/51N Ground or Earth Fault protection. Can I change the percentage threshold for the H2 (Harmonic 2) restraint?
No. For the Sepam 40 ANSI 50N/51N protection function, the Harmonic 2 or H2 restraint percentage threshold is fixed at 20% plus or minus 5%.
This value has been set in the firmware and is based on simulations and studies of real events in power systems.
If you have a power system containing transformers with lower levels of the 2nd harmonic during energization, please contact Schneider Electric Technical Support for other solutions.
AEDL3
This value has been set in the firmware and is based on simulations and studies of real events in power systems.
If you have a power system containing transformers with lower levels of the 2nd harmonic during energization, please contact Schneider Electric Technical Support for other solutions.
AEDL3