5-21
Location Message Line Description
S 3.19
GND LOSET INST
TRIPS ENABLED
Set to ENABLED to enable loset ground element.
Messages S 3.20 to S 3.24 will only appear if ENABLED is selected in message S 3.19.
S 3.20
GND LOSET INST
TRIP 2.0 X P/U
Same as GND HISET INST TRIP feature.
Range: 1.0–7.0, increments of 0.5.
S 3.21
GND LOSET INST
DELAY INST
Same as GND HISET INST TRIP DELAY.
Range: 0–40 cycles.
S 3.22
GND LOSET INST
RELAY TRIP&AUX1
Select the desired output contact(s) to activate on a GND LOSET INST
trip.
S 3.23
GND AUTOBLK INST
LOSET DISABLED
This setpoint allows the user to enable or disable the ground autoblock
loset feature.
Message S 3.24 will only appear if ENABLED is selected in message S 3.23.
S 3.24
GND AUTOBLK LOSET
AFTER RECL.# 4
The G/F LOSET INST TRIP will be blocked after the selected reclosure
shot.
Messages S 3.25 and 3.26 will only appear if CUSTOM CURVE1 was selected in message S 3.6.
S 3.25
TRIP TIME (SEC)
1.03 xPU= 1.0
The trip time for the first breakpoint of the programmable curve for ground
current protection is entered here. The breakpoints are multiples of the
pickup current.
The remainder of the messages in this section are identical to those in the phase current programmable curve setup. Follow
all the same steps until message S 3.18 appears. When the time for this multiple of pickup is entered and stored, pressing the
PAGE key will cause the display to move to the next page of setpoints mode.
NOTE: When the overload is greater than eight times pickup, the 575 will cause a Ground Timed Overcurrent Trip in the time
programmed for an eight times overload. This is regardless of how the Custom Curve is programmed for overloads greater
than eight times pickup.
S 3.26
TRIP TIME (SEC)
20.0 xPU= 1.0
The trip time for the last breakpoint, a current of 20 times the pickup level
is entered here.
S 3.27
GROUND CURRENT
END OF PAGE
The last line of page 3, setpoints. Press the PAGE key to view page 4.
L
A
L
A
SETPOINTS MODE - GROUND CURRENT
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