P
AGE
8
OF
26
DGF100
reference
manual, rev 1, Feb 22, 2022
Ground
Fault
Systems
B.V.
2.6
DGF100 Display
The door mounted DGF100 Display is connected to the DGF100 by up to 10 m of RJ-10 type, 4-wire
telephone type cable. It provides the following remote indications and functions:
Continuous reading of actual ground fault current, employing auto ranging.
‘RESET’ pushbutton. To reset the unit after a trip.
‘VERIFY’ pushbutton. By pushing the ‘VERIFY’ button on the DGF100 Display, it will show if the
DGF100, to which it was connected at the time of trip, tripped due to a ground fault prior to loss of
its Control Voltage by lighting the red ‘G/ F TRIP’ LED. If there was no ground fault trip prior to loss
of Control Voltage the green ‘RUN’ LED will light. This feature is especially useful when pulse tripping
a breaker that also supplies Control Voltage to the DGF100. This indication will remain available for
at least ten hours. The DGF100 Display will reset automatically when Control Voltage is restored.
Ground Fault Test for a description of the test procedure).
The ‘RESET’ button must be held pressed before the ‘TEST’ is pressed to invoke the test procedure.
The function of this button can be enabled/ disabled by inserting the interconnecting cable from the
DGF100 base unit into one of two sockets, TEST ON or TEST OFF, on the right side of the display. If
the feature is disabled and the ‘RESET’ and ‘TEST’ buttons are pressed, the display shows ‘OFF’ for 1
second, and the red ‘G/F TRIP’ LED on the display flashes twice.
Display of the pre-trip ground fault current, after a trip has occurred (flashing display).
When the G/F current exceeds the system’s measuring range, the display shows
Out
, meaning
‘Out of range’.
Power over datalink, no external power supply needed
There are two LEDs present, green and red, showing which state the DGF100 base unit is in.
-
Green ‘RUN’ LED
Flashing:
Okay
Off:
No Control Voltage, Control Voltage too low
-
Red ‘G/F TRIP’ LED Off:
No trip
Steady on:
Trip
After loss of Control Voltage the DGF100 base unit will show if it tripped because of a ground fault,
by lighting the red LED, or if it was a loss of Control Voltage without a trip, by lighting the green
LED.