PUB 50412
D64RPB100 SERIES B1 DIGITAL GROUND FAULT RELAY
Revision 3
April, 2008
Page 12
2 blank boxes to the right of the LCD display window are marked “A” and “kA”. Use a permanent
marker to check the appropriate box as follows:
“A” – when using the built-in CT, a 500:1 ratio C311CT external CT, or a 500:5 ratio interposing
CT
“kA” – when using a 5000:5 ratio interposing CT
A current exceeding the maximum range of the system displays as ‘OUt’. (This means the
measured ground fault current is higher than the measuring range of the D64RPB100.)
Refer to Figure 5 for dimensions, door cutout and mounting provision. A bracket and two #10-24
(M5) bolts are supplied with each D64D1.
4.2
D64D2 REMOTE INDICATOR UNIT
The D64D2 Remote Indicator Unit is connected to the D64RPB100 by up to 30 feet/10m of low
cost 4-wire telephone type cable. It provides the following remote indications and functions:
Green RUN LED
Flashing:
Okay
Off: No control voltage, control voltage too low, or D64RPB100 defective
Steady on:
Control voltage too low or D64RPB100 defective
Red TRIP LED
Off:
No trip
Steady on:
Trip
RESET: To reset relay and LED after a trip.
TEST: (See 2.6 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 D64RPB100 relay 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
test will not take place and the red ‘G/F TRIP’ LED on the display flashes twice.
VERIFY: By pushing the VERIFY button on the Remote Display the D64D2 will show if the
D64RPB100 to which it is connected tripped due to a ground fault prior to loss of its control
voltage by lighting the red 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 D64RPB100. This indication will remain available
for at least ten hours. The D64D2 will reset automatically when control voltage is restored.
5.
CATALOG NUMBERS
D64RPB100
Series B1 Ground Fault Relay with built-in 1.81” (46mm) CT, 24 - 240 Volt ac or
dc control voltage, for use on 660 Volts maximum, 50/60 Hz power system.
Terminal blocks for external CT and remote Test/Reset pushbutton
D64D1
Digital Display Unit with LCD display and 1 meter interconnecting cable, for use
with D64RPB100
D64D2
Remote Indicator Unit with1 meter interconnecting cable, for use with
D64RPB100
