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PUB IB04300001E
D64RPB125 DIGITAL GROUND FAULT RELAY
Revision 1
September, 2004
Page 8
After the trip, if the relay operating mode is Pulsed, 0.5 seconds later the output relay will reset. However the red TRIP
LED will continue to flash, registering the trip and the green RUN LED will remain off. Pressing the Reset button will
cancel the register, the red TRIP LED will turn off and the Green RUN LED will flash.
A “Test Record Form” is included in this instruction manual. This form provides spaces to record the date the test was
performed and the results. Those in charge of the building’s electrical installation should retain the form in order to be
available to the authority having jurisdiction.
3.
INSTALLATION INSTRUCTIONS
Place
the
D64RPB125
in a clean dry enclosure. Try to keep the exposure to mechanical shock and vibration to a
minimum, even though the internal electronics have been encapsulated in epoxy to improve the performance in high
vibration environments.
Locate the relay close to the isolating device (circuit breaker) that is protecting the circuit being monitored.
Provide maximum clearance between the
D64RPB125
and any strong magnetic flux producing devices such as
power transformers, autotransformers, control transformers, reactors, and high power conductors and buswork.
3.1 MOUNTING
Refer to Figure 2 for mounting dimensions of the
D64RPB125
relay. It is designed for mounting from the front with two
#8 x 1.25" self threading pan head mounting screws. The heads of these screws seat against blind inserts imbedded in
each mounting hole.
3.2
BUILT-IN CURRENT TRANSFORMERS
The
D64RPB125
has 3 built-in current transformers with 0.49” (12.5mm) openings on 1“(25.4mm) centers. The Trip
Level range is 0.1 Amps to 2.0 Amps. The maximum continuous primary phase current is to be 125 Amps.
Phase conductors must be insulated for the system voltage when it is higher than 660 Volts.
Pass the phase conductors through the CT windows. Do not pass ground conductors through the CT windows. In
applications that require shielded wires to pass through the CT window, return the shields through the CT window
before connecting them to ground.
Verify that the polarity of the conductors is correct when they pass through the CT. Verify that ground paths do not exist
that would bypass the CT.
Position power cables in the center of the current transformer opening.
There is no provision for a neutral conductor. If a current carrying neutral conductor is part of the circuit that is to be
monitored select the D64RPB100 ground fault relay.
3.3 CONNECTIONS
All connections to the
D64RPB125
are by means of screw clamp terminals rated 10 Amps, 300 Volts. Terminals will
accept #26-12 AWG solid or stranded conductors.
The terminals are pull apart. A screw mounted locking block is located at each end of the 8 point terminal block for
maximum security.
An RJ-12 port is provided for connection of a D64DMCC display suitable for mounting in the Eaton’s Cutler-Hammer
MCC door mounted panel. See section 4.