Catalog Number Description
EGF1NODCNE100
N.O. 0.15 A @ 30 VDC, Normally Energized, 100 mA Range
EGF1NODCDE100
N.O. 0.15 A @ 30 VDC, Normally De-Energized, 100 mA Range
EGF1NCDCNE100
N.C. 0.15 A @ 30 VDC, Normally Energized, 100 mA Range
EGF1NCDCDE100
N.C. 0.15 A @ 30 VDC, Normally De-Energized, 100 mA Range
EGF3NOACNET3
N.O. 1 A @ 240 VAC, Normally Energized, 5/10/30 mA Range
EGF3NOACDET3
N.O. 1 A @ 240 VAC, Normally De-Energized, 5/10/30 mA
Range
EGF3NODCNET3
N.O. 0.15 A @ 30 VDC, Normally Energized, 5/10/30 mA
Range
EGF3NODCDET3
N.O. 0.15 A @ 30 VDC, Normally De-Energized, 5/10/30 mA
Range
EGF3NCACNET3
N.C. 1 A @ 240 VAC, Normally Energized, 5/10/30 mA Range
EGF3NCACDET3
N.C. 1 A @ 240 VAC, Normally De-Energized, 5/10/30 mA
Range
EGF3NCDCNET3
N.C. 0.15 A @ 30 VDC, Normally Energized, 5/10/30 mA
Range
EGF3NCDCDET3
N.C. 0.15 A @ 30 VDC, Normally De-Energized, 5/10/30 mA
Range
Introduction
The CurrentWatch™ EGF Series is a family of ground fault (earth
leakage) sensors. Ground fault sensors help protect people, prod-
ucts, and processes from damage by ground fault conditions by
monitoring all current-carrying conductors in grounded single- and
three-phase delta or wye systems. They provide a contact output
that can operate relays, contactors or signal automation systems.
Note:
N
This manual only covers solid state versions of the EGF Series (listed
in the table above). For installation manuals covering other models in the EGF
Series family, please contact Eaton Sensor Application Engineers.
Quick Install Guide
The below steps can be followed to quickly install a CurrentWatch
EGF Series switch.
1. Run all current carrying conductors through sensor window,
using an auxiliary current transformer if conductors do not fit.
2. Mount the sensor to a surface if needed.
3. Connect output and power wiring:
a. Use up to 14 AWG copper wires,
b. Ensure power and load matches those shown on the sensor
label.
4. Test the unit
a. Pressing the “TEST” button will test the sensor’s internal
circuits
(
CAUTIONe:
The output and any connected loads will
switch during the test process)
Installation and Wiring
Considerations for installing and wiring EGF Series sensors…
•
Run wire to be monitored through the aperture (opening) in the
switch body, making sure all wires are oriented so that current
flows in the same direction (see “Principal of Operation” section
below).
•
These sensors can be located in the same environment as
motors, contactors, heaters, pull-boxes, and other electrical enclo-
sures.
•
Mounting can be done in any position or hung directly on a wire
with a wire tie.
•
Be sure to leave at least one in.(25.4 mm) distance between sen-
sor and other magnetic devices.
•
Connect power and output wiring to the sensor, using up to 14
AWG copper wire and tightening terminals to 7 in.-lbs / 0.79 N·m
maximum torque.
•
Make sure the power supply matches the power rating on the
sensor label.
•
Make sure the output load is less than or equal to the output rat-
ing on the sensor label.
Power
Output
G
X
Control Power
(Match Sensor Rating--See Label)
TEST
(+)
(-)
Power Supply LED
Contact Status LED
Load
Contactor, Relay, Shunt Trip Breaker...
(Do Not Exceed Rating--See Label)
Setpoint Adjust
Factory Calibrated and Covered
(Remove Cover, Adjust and
Relabel if Required)
Output Power
(Match Sensor Rating--See Label)
For DC Output Versions...
Observe Polarity
Principal of Operation
Under normal conditions, the current in one wire of a two wire load
is equal in strength but opposite in sign to the current in other wire.
The two wires create magnetic fields that cancel, a condition known
as “Zero Sum Current.” If any current leaks to ground (Ground Fault),
the two currents become unbalances and there is a net resulting
magnetic field. The EGF Series sensor detects this minute field and
change the output state. This concept extends to three phase sys-
tems such as 3-wire Delta and to 4-wire Wye.
OptraoiNn
To test operation, gently press the TEST button. This simulates a fault
and tests the internal switching circuits. The following operation should
be observed.
CAUTIONe:
Any circuit connected to the sensor will be operated.
Power
Output
Power
Interupt
A
B
C
N
3 Wye Power
3 Load
Power
Output
Power
Interupt
HOT
NEUT
1 Power
1 Load
Power
Output
Power
Interupt
A
B
3 Power
1 Load
Power
Output
Power
Interupt
A
B
C
3 Delta Power
3 Load
Models Covered In This Publication
(Cont.)
2
EATON
www.eaton.com
CurrentWatch™ EGF Series Ground Fault Sensors
120 VAC Powered, N.O. or N.C.,
Solid State Relay Output
Instructions Publication
P51925
Effective July 2017
