hager hw+ - 4.5 Earth fault protection

56 6LE008146B
Protection functions
4.5 Earth fault protection
The earth protection is used against phase-to-earth faults. The earth fault currents can reach a
high enough amplitude that they are similar to a short circuit.
It is based on the calculation of the sum of the phase and neutral currents.
Earth protection curve
I (A)
t (s)
tg
lg
l²t
Earth protection
Parameters
G
Activation Activation of the GF earth fault protection
Ig (xIn) Earth protection threshold
tg (s) Earth protection time delay
I²tg (On/O) Earth I²t protection curve
The Earth fault protection is adjusted from the PROTECTION EARTH menu of the sentinel
Energy display or from the Hager Power setup software.
Adjusting the Ig pick-up setting
0.10 to 1.00 x In in increments of 0.10.
When the Activation parameter is set to OFF, earth fault protection is deactivated.