PUB 50413
D64RPBH13 SERIES B1 GROUND FAULT RELAY
Revision 2
September, 2009
Page 12
Connect the external C311CT current transformer to terminal CT1 & CT2 of the D64RPBH13, using 14
AWG (minimum) twisted conductors. If a remote Test button is being used connect as shown in Figure
1.
CAUTION: Internally these terminals are connected to the FB terminal via a 2.5 V DC voltage
source, shunted with a 7 V transients suppressing zener diode. DO NOT connect the external
transformer to ground at any other point.
4.
CATALOG NUMBERS
D64RPBH13
Ground Fault Relay with 110 - 240 Volt ac/dc control voltage, for use on maximum
660 Volt power system, current trip range: 2.5 – 60 Amps with 500:1 ratio C311CTs or
50 - 1200 Amps with 10,000:1 ratio C311CTs, trip time: 25 ms – 1.0 sec, trip output:
toggle operated circuit breaker, for use with service protection equipment.
Zero Sequence Current Transformers with 500:1 ratio:
C311CT1-A2
1.81" (46 mm) inside diameter, Toroidal
C311CT2-A2
3.54" (90 mm) inside diameter, Toroidal
C311CT3-A2
5.9" x 6.7" (150 x 170 mm) rectangular, Split Core
C311CT4-A2
3.94" x 13.78" (100 x 350 mm) rectangular, Split Core
C311CT5-A2
5.7" (145 mm) inside diameter, Toroidal
C311CT6-A2
9.45" (240 mm) inside diameter, Toroidal
C311CT7-A2
11.8" x 11.8" (300 x 300 mm) square, Split core
C311CT8-A2
1.1" (28 mm) inside diameter, Toroidal
C311CT9-A2
2.56" (65 mm) inside diameter, Toroidal
C311CT28-A2 1.1” (28 mm) inside diameter, Toroidal – with wire leads
Zero Sequence Current Transformers with 10,000:1 ratio:
C311CT11
2.56” (65mm)
inside diameter, Toroidal
C311CT12
5.7" (144mm)
inside diameter, Toroidal
C311CT13
9.45" (238mm)
inside diameter, Toroidal
C311CT14
3.75" (95mm)
inside diameter, Toroidal
C311CT15
7.875" x 11.42” (200 x 290 mm) rectangular
For mounting dimensions and additional information on C311CT current transformers refer to the
current Eaton’s Cutler-Hammer catalog.
The D64RPBH13 is designed to operate with special Eaton’s Cutler-Hammer C311CT current
transformers having a turns ratio of 10,000:1. Each C311CT is epoxy molded for exceptional
mechanical properties and has a high-grade silicon iron core for excellent coupling characteristics.
C311CTs have built-in back-to-back zeners across the output terminals to provide maximum safety in
the event of an open CT secondary circuit.
NOTE:
For Ground Fault Relay with programmable output relay and with zone grading option,
suitable for use with service protection equipment; refer to D64RPBH15, Pub 50414.
5.
TECHNICAL SPECIFICATION
Control voltage ....................................................................... 110 - 240 Volts 45 - 450 Hz AC, 2 VA max
110 – 240 V dc, 1 W max
Operating tolerance ............................................................................... 55% to 110% of rated ac voltage
80% to 110% of rated dc voltage
Maximum System Voltage & Frequency .......................................................... 660 Volts ac, 40 to 200 Hz
The D64RPBH15 may be applied on higher voltage circuits providing the power conductors are
insulated for the system voltage.
