INSTRUCTION
MANUAL
D64RPY2
D64RPY2 SERIES A1 DIGITAL GROUND FAULT RELAY
Pub. No. IM-
D64RPY2
Ser. A1, August, 2002
Page 4
The Pulsed Trip Auto Reset mode is designed for applications where the output relay is
operating a shunt trip device. The D64RPY2 resets automatically in approximately 20
milliseconds after the ground fault current is interrupted by the tripping action of the circuit
breaker. The output contact to the shunt trip coil opens. This prevents damage to the internal
mechanism of the circuit breaker in the event that the operator tries to reset the circuit
breaker. Also, when the control voltage to the D64RPY2 is interrupted by action of the shunt
trip, the D64RPY2 resets automatically in approximately 20 milliseconds.
Chassis Ground
Chassis ground is the ground to which all of the non-current carrying metal equipment is
connected/bonded. Typically, equipment grounding is provided by means of a ground bus. A
solid connection is to be made from White wire lead of the D64RPY2 to the nearest chassis
ground to ensure the relay complies with the specified Electromagnetic compatibility (EMC)
standards.
2.2
RESET
After a trip, the electronics remain in the tripped state for 3 seconds, or until the control voltage is
removed from the Black and White wire leads, if less than 3 seconds, or until the ground fault current
drops below the trip level, if less than 3 seconds.
The output relay will reset automatically.
2.3
GROUND FAULT TEST
The D64RPY2 has Blue and Purple wire leads for connection to a remote N.O. Test button. Pressing
this button invokes a relay test. A simulated current of 600 milliamps (1.2 times the trip current)
replaces the measured current. After 500 milliseconds have elapsed, the unit should trip. This
procedure tests the functionality of the unit.
After the trip, the output relay will reset in approximately 20 milliseconds after the Test button opens or
after 3 seconds if the Test button is still held closed. (Auto Reset)
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 D64RPY2 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 D64RPY2 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 D64RPY2 relay. It is designed to be mounted with
two #8-32 x 1/2" (M4 x 12) mounting screws.
3.2
BUILT-IN CURRENT TRANSFORMER
The D64RPY2 has a built-in current transformer (CT) with 1.1” (28 mm) opening.
