P
AGE
12
OF
26
DGF100
reference
manual, rev 1, Feb 22, 2022
Ground
Fault
Systems
B.V.
13.
If an external Reset pushbutton is being used, connect it to terminals R1 and T2/R2 of the DGF100
using twisted pair cable (of any gauge accepted by the terminals). If the distance between the
button and the DGF100 exceeds 1 m, shielded cable is recommended, the shield being connected to
chassis ground by means of a clamp, close to the DGF100 (where the FB terminal is bonded to
chassis ground as well). From the clamp to the terminals the wires can be left unshielded.
The external reset button must be a voltage-free N.O. contact; no external power supply is required.
See
14.
Up to six DGF100 units in the same enclosure may share a common remote Reset/Test button.
Connect one terminal of the button to terminal T2/R2 of
one
of the units, and connect the other
terminal of the button to terminals R1 of
all
15.
Position power cables in the centre of the current sensor opening. Keep cables and buswork clear of
the split on split core current sensors.
16.
Verify that the polarity of the conductors is correct when they pass through the CS. Verify that
ground paths do not exist that would bypass the CS.
17.
Phase Conductors must be insulated for the system voltage when it is higher than 660 V.
NOTE: Use the correct type of CS as specified in
. The use of standard type of core balance
current transformers, connected to the external CS input, may lead to catastrophic failure of the DGF100.