PUB IB04300001E
D64RPB125 DIGITAL GROUND FAULT RELAY
Revision 1
September, 2004
Page 6
TABLE 1 – DIPSWITCH SETTINGS
In the table below ‘D’ denotes down and ‘U’ denotes up.
Dipswitch settings (* = factory setting)
Switch
Function
Set to
Meaning on D64RPB125
1 2
Trip relay operation mode
D D *
D U
U D
U U
Non-failsafe operation with manual reset
Failsafe operation with manual reset
Auto reset operation (reset delay 3 seconds after G/F removed)
Pulsed operation – 0.5 second pulse (with manual reset of red TRIP
LED register)
3 4 5
Trip time delay
D D D *
D D U
D U D
D U U
U D D
U D U
U U D
U U U
20 ms
50 ms
100 ms
200 ms
500 ms
1 s
2 s
5 s
6 7 8
Trip current limit
D U U
D U D
D D U
D D D *
U U U
U U D
U D U
U D D
0.1 A
0.2 A
0.3 A
0.4 A
0.5 A
1.0 A
1.5 A
2.0 A
2.2.1
OUTPUT RELAY OPERATING MODE - DIPSWITCHES 1 & 2
Referring to the Glossary of Terms, determine if FAILSAFE, NON-FAILSAFE, AUTO RESET, or PULSED operation of
the output relay is required. The factory setting is NON-FAILSAFE with DIPswitches 1 & 2 in the
D
own position.
Refer to Table 1 for DIPswitch settings for FAILSAFE, AUTO RESET, and PULSED operation.
2.2.2
GROUND FAULT TRIP DELAY TIME – DIPSWITCHES 3, 4, & 5
The ground fault TRIP DELAY time range is 20 milliseconds - 5.0 seconds. Table 1 provides a listing of the eight TRIP
DELAY settings, which can be made with DIPswitches 3, 4, & 5.
The TRIP DELAY time begins when the ground fault trip level setting is reached or is exceeded.
Set the ground fault TRIP DELAY time to provide the desired delay before the output relay changes state 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.
2.2.3
GROUND FAULT TRIP CURRENT LEVEL - DIPSWITCHES 6, 7, & 8
The ground fault TRIP LEVEL range is 0.1 Amps – 2.0 Amps. Table 1 provides a listing of the eight TRIP LEVEL
settings, which can be made on DIPswitches 6, 7, & 8.
