Eaton CurrentWatch EGF Series User manual

IN ORDER TO AVOID ELECTRIC SHOCK OR OTHER POSSIBLE INJURY:
• DO NOT USE THIS PRODUCT FOR HUMAN SAFETY APPLICATIONS.
IT WAS NOT DESIGNED, TESTED OR RECOMMENDED FOR THIS
USE.
• DO NOT USE THIS PRODUCT IN HAZARDOUS LOCATIONS (E.G.
EXPLOSIVE ATMOSPHERES). IT WAS NOT DESIGNED, TESTED OR
RECOMMENDED FOR THIS USE.
• ENSURE THE PRODUCT IS PROPERLY WIRED TO THE CORRECT
POWER SUPLLY FOR THE APPLICATION. REFER TO THE
SPECIFICATIONS AND WIRING DIAGRAMS IN THIS MANUAL.
MODELS COVERED IN THIS MANUAL
Catalog Number Description
EGF1NOACNE050 N.O. 1A @ 240V AC, Normally Energized, 50 mA Range
EGF1NOACDE050 N.O. 1A @ 240V AC, Normally De-Energized, 50 mA Range
EGF1NCACNE050 N.C. 1A @ 240V AC, Normally Energized, 50 mA Range
EGF1NCACDE050 N.C. 1A @ 240V AC, Normally De-Energized, 50 mA Range
EGF1NOACNE100 N.O. 1A @ 240V AC, Normally Energized, 100 mA Range
EGF1NOACDE100 N.O. 1A @ 240V AC, Normally De-Energized, 100 mA Range
EGF1NCACNE100 N.C. 1A @ 240V AC, Normally Energized, 100 mA Range
EGF1NCACDE100 N.C. 1A @ 240V AC, Normally De-Energized, 100 mA Range
EGF1NODCNE050 N.O. 0.15A @ 30V DC, Normally Energized, 50 mA Range
EGF1NODCDE050 N.O. 0.15A @ 30V DC, Normally De-Energized, 50 mA Range
EGF1NCDCNE050 N.C. 0.15A @ 30V DC, Normally Energized, 50 mA Range
EGF1NCDCDE050 N.C. 0.15A @ 30V DC, Normally De-Energized, 50 mA Range
EGF1NODCNE100 N.O. 0.15A @ 30V DC, Normally Energized, 100 mA Range
EGF1NODCDE100 N.O. 0.15A @ 30V DC, Normally De-Energized, 100 mA Range
EGF1NCDCNE100 N.C. 0.15A @ 30V DC, Normally Energized, 100 mA Range
EGF1NCDCDE100 N.C. 0.15A @ 30V DC, Normally De-Energized, 100 mA Range
EGF3NOACNET3 N.O. 1A @ 240V AC, Normally Energized, 5/10/30 mA Range
EGF3NOACDET3 N.O. 1A @ 240V AC, Normally De-Energized, 5/10/30 mA Range
EGF3NODCNET3 N.O. 0.15A @ 30V DC, Normally Energized, 5/10/30 mA Range
EGF3NODCDET3 N.O. 0.15A @ 30V DC, Normally De-Energized, 5/10/30 mA Range
EGF3NCACNET3 N.C. 1A @ 240V AC, Normally Energized, 5/10/30 mA Range
EGF3NCACDET3 N.C. 1A @ 240V AC, Normally De-Energized, 5/10/30 mA Range
EGF3NCDCNET3 N.C. 0.15A @ 30V DC, Normally Energized, 5/10/30 mA Range
EGF3NCDCDET3 N.C. 0.15A @ 30V DC, 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, products,
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 that this manual only covers solid state versions of the EGF
Series (listed in the table to the left). For installation manuals
covering other models in the EGF Series family, please contact
Eaton’s Cutler-Hammer 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 (CAUTION: 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
on reverse side)
• These sensors can be located in the same environment as motors,
contactors, heaters, pull-boxes and other electrical enclosures
• Mounting can be done in any position or hung directly on a wire
with a wire tie
• Be sure to leave at least one inch distance between sensor and
other magnetic devices
• Connect power and output wiring to the sensor, using up to 14
AWG copper wire and tightening terminals to 7 inch-pounds 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 rating
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
Installation Instructions
CurrentWatch™ EGF Series Ground Fault Sensors
120V AC Powered, N.O. or N.C., Solid State Relay Output
P51925 Rev 02
Effective: August 2007 Page 1
WARNING
Questions? Call our Sensor Application Engineers at [phone].
490020207

P51925 Rev 02
Effective: August 2007 Page 2
Questions? Call our Sensor Application Engineers at [phone].
POWER SUPPLY NOTES
All low-current ground-fault sensors are sensitive devices that require
reasonable care in system design to avoid false trips caused by high
electrical noise levels. Keep in mind that the best way to reduce noise in
a system is to suppress it at its source.
• Keep the sensor power isolated from noisy circuits
• Do not power the sensor with the same circuit that switches
contactors or other high current inductive loads
SYSTEM GROUNDING
Good design practice and code require that all AC power systems be
grounded. The EGF Series sensors are designed to work on grounded
AC power systems. They may not operate properly on ungrounded
systems.
SPECIFICATIONS
Specification Value
Power Supply 120V AC (Operates from 66-132V)
Voltage Range Up to 1,500V AC (Monitored Circuit)
Power Consumption 2.5W
Output Magnetically Isolated Solid State Switch
Output Rating AC Models:
1A @ 240V AC (2A for 10 Min.)
DC Models:
0.15A @ 30V DC (500 mA Momentary)
Response Time At 5% Over Setpoint: 150 ms
At 50% Over Setpoint: 100 ms
Setpoint Range Models Ending -T3:
5, 10 or 30 mA (Adjustable by Jumper)
All Other Models:
50 or 100 mA (See “Setpoint Adjustment”)
Frequency Range 50-400Hz (Monitored Circuit)
Housing UL94 V0 Flammability Rated
Dimensions Housing: 2.5 in. H x 2.8 in. W x 1.5 in. D (64x71x38mm)
Aperture: 0.75 in. (19mm)
LED Green = Power Supply Energized
Environmental Operating Temperature: +5 to +158° F (-15 to +70° C)
Humidity: 0-95% RH, Non-Condensing
Approvals UL1053, Class 1 Recognized
CE Certified
490020207
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 systems such as 3-
wire Delta and to 4-wire Wye.
OPERATION
To test operation, gently press the TEST button. This simulates a fault
and tests the internal switching circuits. The following operation should
be observed. CAUTION: Any circuit connected to the sensor will be
operated.
Normally Energized Models
Used for detecting ground faults and loss of control power.
Output
No Power
Control Power Applied
No Fault Fault Detected
Output LED Output LED Output LED
N.C. Closed Off Open On Closed Off
N.O. Open Off Closed On Open Off
Normally De-Energized Models
Used for detecting ground faults only.
Output
No Power
Control Power Applied
No Fault Fault Detected
Output LED Output LED Output LED
N.C. Closed Off Closed Off Open On
N.O. Open Off Open Off Closed On
SETPOINT ADJUSTMENT
The EGF Series sensors are factory calibrated to trip at the setpoint
specified by the model number. While it is generally recommended not
to change this setpoint, it can be done by following the below steps.
1. Connect control power and circuits. Run a conductor through the
aperture with current equal to your desired setpoint.
2. Adjust setpoint to maximum by first removing the setpoint cover.
Turn the adjustment pot four revolutions counter-clockwise to the
maximum (least sensitive) setpoint. The Status LED should be off.
The adjustment pot has a slip clutch so that you cannot feel or
damage the end point.
3. Dial in the new setpoint by slowly turning the pot clockwise until
the LED turns on. The sensor is now adjusted to trip at the current
that is passing through the aperture. Reset the sensor.
4. Relabel the sensor with a new setpoint. Use a label maker or tape
with a permanent marker.
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