Cutler Hammer, Div of Eaton Corp EAC Series Installation Instructions
Installation Instructions
CurrentWatch™ EAC Series Current Sensors
Powered AC Current Sensors, 120V AC or 24V AC/DC, 4-20 mA Output
WARNING
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
EACP0420120SP 120V AC Power Supply, 2/5A Range, 4-20 mA Output
EACP1420120SP 120V AC Power Supply, 10/20/50A Range, 4-20 mA Output
EACP2420120SP 120V AC Power Supply, 100/150/200A Range, 4-20 mA Output
EACP042024USP 24V AC/DC Power Supply, 2/5A Range, 4-20 mA Output
EACP142024USP 24V AC/DC Power Supply, 10/20/50A Range, 4-20 mA Output
EACP242024USP 24V AC/DC Power Supply, 100/150/200A Range, 4-20 mA Output
INTRODUCTION
The CurrentWatch™ EAC Series Powered
combines a current sensor and signal
conditioning electronics in a single package
for use in 120V line-voltage or 24V AC/DC
control power applications. The combination
of these devices results in a single unit with
higher accuracy, fewer individual terminations
and a space-saving simplifi ed installation.
The EAC Series family of powered current
sensors are available in split-core enclosures with 4-20 mA analog
outputs. These sensors are average responding and intended for use in
constant or on/off load applications with sinusoid waveforms.
Eaton’s current sensor family encompasses a broad range of products
for cost-effective monitoring, status, and predictive maintenance.
Downtime and costly repairs can be avoided by utilizing Eaton’s
products and technologies in your control systems.
QUICK INSTALL GUIDE
The below steps can be followed to quickly install a CurrentWatch™
EAC Series Powered sensor.
1. Run the wire to be monitored through the aperture
2. Mount the sensor to a surface if needed
3. Connect output wiring, using up to 12 AWG copper wires
4. Choose the correct range by positioning the Range Jumper
P51918 Rev 01
292000411
INSTALLATION
Considerations for all EACP Series models…
• 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
Considerations for split-core models only…
• Press the tab in the direction
shown in the diagram to the right.
• After placing the wire in the
aperture, press the hinged portion
fi rmly downward until a click is
heard and the tab pops out fully.
• Keep split-core contact areas
clean. Silicon grease is factory applied on the mating surfaces to
prevent rust and improve performance. Be careful not to allow
grit or dirt into the grease in the contact area, particularly on core
mating surfaces of split core models. Sensor operation could be
impaired if mating surfaces do not have good contact. Check
visually before closing.
RANGE SELECTION
The CurrentWatch™ EAC Series Powered sensors feature fi eld
selectable ranges. The ranges are factory calibrated, eliminating time
consuming and innacurate fi eld setting of zero or span.
Setting Range
1. Determine the normal operating amperage of your monitored
current
2. Select the range this is equal to or slightly higher than the normal
operating amperage
3. Place the Range Jumper in the appropriate position
OUTPUT WIRING
Connect control or monitoring wires to the sensor. Use up to 12 AWG
copper wire and tighten terminals to 4 inch-pounds torque.
Power Supply
(24V AC/DC or 120V AC)
(-)
Load
(+)
(Controller, Meter...)
1 2 3 (-) 4(+)
Power Output
Connection Notes:
• Deadfront captive screw terminals
• Use 12-22 AWG solid or stranded
• Observe polarity
Important:
Keep contact areas clean
To open:
Press tab inward
towards hinge
Effective: April 2007 Page 1
Questions? Call our Sensor Application Engineers at (800) 426-9184.
P51918 Rev 01
292000411
MAXIMUM INPUT AMPS
Maximum Amps
Range
0-2A 125A 250A
0-5A 125A 250A
0-10A 125A 250A
0-20A 150A 300A
0-50A 215A 400A
0-100A 300A 600A
0-150A 450A 800A
0-200A 500A 1,000A
6 sec. 1 sec.
TROUBLESHOOTING
Problem
Sensor has no output Power supply is not properly sized. Check power supply voltage and
Output signal is
too low
Output signal is
always at 20 mA
Output signal is
always at 4 mA
Solution for Current
Output Models
current rating.
Polarity is not properly matched. Check and correct wiring polarity.
For split core models, the core contact area may be dirty. Open the
sensor and clean the contact area.
The range may be too high for the current being monitored. Select a
difference EACP Series model with lower range.
The load current is not sinusoidal. Select an EACR Series sensor that
works on distorted waveforms.
Monitored current is below minimum required. Loop the monitored
wire several times through the aperture until the “sensed” current rises
above minimum. (‘Sensed Amps’ is equal to ‘Actual Amps’ multiplied by
the ‘Number of Loops.’)
The range may be too low for the current being monitored. Select a
different EACP Series sensor with a higher range.
Monitored load is not AC or is not on. Check that the monitored load is
AC and that it is actually on.
SPECIFICATIONS
Specifi cation Value
Power Supply Models Ending 120SP: 120V AC
Models Ending 24USP: 24V AC/DC, 40V Max.
Output Signal 4-20 mA
Output Limit 23 mA
Output Load 500W Max.
Response Time 100 ms (90% of Step Change)
Frequency Range 40-400 Hz
Accuracy 1% FS
Loading 500 ohms
Isolation Voltage UL Listed to 1,270V AC, Tested to 5,000V AC
Sensing Aperture Solid Core Models: 0.75 in. (19mm) dia.
Split Core Models: 0.85 in. (21.7mm) sq.
Housing UL94 V0 Flammability Rated
Environmental Operating Temperature: -4 to +122° F (-20 to +50° C)
Humidity: 0-95% RH, Non-Condensing
Approvals UL 508 Industrial Control Equipment (Pending, USA and Canada)
CE Certifi ed
Effective: April 2007 Page 2
Questions? Call our Sensor Application Engineers at (800) 426-9184.
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