PUB 50413
D64RPBH13 SERIES B1 GROUND FAULT RELAY
Revision 2
September, 2009
Page 6
2.2.1
GROUND FAULT TRIP DELAY
The ground fault TRIP DELAY time range is 25 milliseconds - 1.00 second. Table 1 provides a listing of
the TRIP DELAY settings, which can be made with DIPswitches 1 through 4 on the 12 Position Array.
The Trip Delay begins when the ground fault trip level setting is reached or is exceeded.
Table 1: Ground Fault Trip Delay
DIPSWITCH
SETTINGS
TIME DELAY
IN
MILLISECONDS
1
2
3
4
L=LEFT
R=RIGHT
L
L
L
L
*
25
L
L
L
R
65
L
L
R L
100
L
L
R R
130
L
R L
L
160
L
R L
R
190
L
R R L
225
L
R R R
255
R L
L
L
375
R L
L
R
500
R L
R L
625
R L
R R
750
R R L
L
875
R R L
R
1000
* Factory Setting
Set the ground fault TRIP DELAY to provide the desired delay before the output relay will trip when the
ground fault TRIP LEVEL setting is reached or exceeded.
The setting should be selected to co-ordinate with other ground-fault devices connected on the same
transformer secondary: set shorter than upstream devices; set longer than downstream devices. If no
other ground-fault devices are connected, set for the shortest time.
2.2.2
GROUND FAULT TRIP LEVEL
The ground fault TRIP LEVEL range is either 50 - 1200 Amps when using the special Eaton’s Cutler-
Hammer C311CT zero sequence current transformer with a turns ratio of 10000:1 or 2.5 – 60 Amps
when using the standard family of C311CT zero sequence current transformers with a turns ratio of
500:1. The following table provides a listing of the TRIP LEVEL settings, which can be made with
DIPswitches 5 through 9.
The ground fault TRIP LEVEL setting determines the inhibit level (when inhibit is enabled).
