Cutler Hammer, Div of Eaton Corp ECSJ Series Installation Instructions

Installation Instructions

CurrentWatch™ ECSJ Series Current Sensors

Self-Powered AC Current Sensors with Jumper Selectable Current Ranges

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 FOR THE
APPLICATION. REFER TO THE SPECIFICATIONS AND WIRING
DIAGRAMS IN THIS MANUAL.

MODELS COVERED IN THIS MANUAL

Catalog Number Description

ECSJ400SC Solid Core, 1-6/6-40/40-175A Current Ranges, N.O., 1A @ 240V AC

ECSJ406SC Solid Core, 1-6/6-40/40-175A Current Ranges, N.O., 15A @ 120V AC

ECSJ401SC Solid Core, 1-6/6-40/40-175A Current Ranges, N.C., 1A @ 240V AC

ECSJ407SC Solid Core, 1-6/6-40/40-175A Current Ranges, N.C., 15A @ 120V AC

ECSJ420SC Solid Core, 1-6/6-40/40-175A Current Ranges, N.O., 0.15A @ 30V DC

ECSJ424SC Solid Core, 1-6/6-40/40-175A Current Ranges, N.O., 0.15A @ 30V DC

ECSJ421SC Solid Core, 1-6/6-40/40-175A Current Ranges, N.C., 0.15A @ 30V AC

ECSJ404SC Solid Core, 1-6/6-40/40-175A Current Ranges, N.O., 3A @ 120V AC

ECSJ405SC Solid Core, 1-6/6-40/40-175A Current Ranges, N.C., 3A @ 120V AC

ECSJ402SP Split Core, 1.75-6/6-40/40-200A Current Ranges, N.O., 1A @ 240V AC

ECSJ403SP Split Core, 1.75-6/6-40/40-200A Current Ranges, N.C., 1A @ 240V AC

ECSJ422SP Split Core, 1.75-6/6-40/40-200A Current Ranges, N.O., 0.15A @ 30V DC

ECSJ423SP Split Core, 1.75-6/6-40/40-200A Current Ranges, N.O., 0.15A @ 30V DC

INTRODUCTION

The CurrentWatch™ ECSJ Series current operated switches provide the
same dependable indication of status offered by the CurrentWatch™
ECS Series, but with the added benefi t of increased setpoint accuracy.

A choice of three, jumper selectable input ranges allows the ECSJ
Series to be tailored to an application, providing more precise control
through improved setpoint resolution. Self-powering, isolated solid­state outputs, 1-6A, 6-40A and 40-200A input ranges, and a choice of
split or solid core enclosures are standard.

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.

P51919 Rev 01

391000418

INSTALLATION

Considerations for all ECSJ
Series models…

• Run wire to be
monitored through the
aperture (opening) in
the switch body

• These switches 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 on a wire

• The high current (15A) solid state relay in the ECSJ406SC and
ECSJ407SC models generates heat when the switched circuit
rises over three amps. To dissipate this heat, mount the sensor on
a steel or aluminum surface for at least one square foot (930 cm
Thermal transfer compound is recommended.

Considerations for ECSJ split-core models…

• To open the switch, press the tab inward (toward the body of the
switch) as shown below

• 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 the contact areas of split-core switches clean at all times

Important:

Keep contact areas clean

To open:

Press tab inward
towards hinge

QUICK INSTALL GUIDE

The below steps can be followed to quickly install a CurrentWatch™
ECSJ Series switch.

1. Run the wire to be monitored through the aperture

2. Connect output wiring
a. Use up to 14 AWG copper wires
b. Ensure load matches the output shown on the switch label

3. Adjust the setpoint
a. Choose correct range by positioning the range jumper

b. Use the potentiometer to adjust the setpoint

SWITCHING DELAY

Delay Type Low Range Mid Range High Range

On Delay 0.23 sec. max. 0.05 sec. max. 0.03 sec. max.

Off Delay 0.02 sec. max. 0.02 sec. max. 0.01 sec. max.

2

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Effective: April 2007 Page 1

Questions? Call our Sensor Application Engineers at [phone].

P51919 Rev 01

391000418

SETPOINT ADJUSTMENT

The CurrentWatch™ ECSJ Series features two setpoint adjustment
mechanisms.

• First, select the setpoint range with the range jumper.

• Then, fi ne tune the setpoint with the four-turn potentiometer (pot).
See the product label for amp ranges and jumper positions.

The four-turn pot is shipped from the factory set fully clock-wise to the
lowest setpoint. Turning the pot counter-clockwise will increase the
setpoint. The pot has a slip-clutch to prevent damage at either end of its
rotation. To determine where the adjustment is, turn the pot all the way
clockwise. This will return it to the minimum setpoint.

Important Setpoint Adjustment Notes

• Output contacts are solid-state. Check output status by applying
the appropriate voltage and load and then reading the voltage drop
across the contacts. An Ohmmeter set on “continuity” will give
misleading results.

• It is recommended the setpoint be adjusted to allow for voltage
variations of 10 to 15 percent.

Typical Adjustment Steps

1. Move the jumper to the desired range. Then, turn the pot to the
minimum setpoint (four turns clockwise).

2. Have normal operating current running through the switch. The
output should be tripped since the pot is at its minimum setpoint.
For units with an LED, it should be fl ashing fast (two to three times
per second).

3. Turn the pot counter-clockwise until the unit un-trips. This is
indicated by the slow fl ashing of the LED (once every two to three
seconds), or by changing of the output switch status.

4. Now turn the pot clockwise slowly until the unit trips again. It is
now set at the current level being monitored.

a. To set underload, turn the pot about 1/8 turn further clockwise

b. To set overload, turn the pot about 1/8 turn further counter-

clockwise

• For ECSJ421SC models, the LED does not fl ash. Steady
LED-on indicates contact has been opened.

WIRING DIAGRAMS

Connect control or monitoring wires to the sensor. Use up to 14 AWG
copper wire and tighten terminals to 7 inch-pounds torque. Be sure the
output load does not exceed the switch rating. The DC output models
are polarity sensitive.

CAUTION! Incandescent lamps can have “cold fi lament inrush”
current of up to ten times their rated amperage. use caution when

switching lamps.

Output Diagram

AC, Normally Open
(N.O.) Models

DC, Normally Open
(N.O.) Models

AC

Power

Monitored

DC

Power

Monitored

Wire

Wire

(N.O. Model Shown)

(N.O. Model Shown)

Load

Load

AC

DC

Use caution when

switching lamps

Use caution when

switching lamps

RANGES AND MAXIMUM AMPS

Range
Jumper

None 1-6A 1.75-6A 400A 600A

Mid 6-40A 6-40A 500A 800A

High 40-175A 40-200A 800A 1,200A

Range Maximum Amps

Solid Core Split Core 6 sec. 1 sec.

HYSTERESIS

Range
Setting Hysteresis

Low <

Mid <

High <

TROUBLESHOOTING

Problem Solution

Switch is
always
tripped

Switch will
not trip

The jumper may be set in a range that is too low for current being monitored.
Move jumper to the correct range.

The setpoint may be too low. Turn pot counter-clockwise to increase setpoint.

For DC models only, polarity might be mismatched. Check polarity on output
wiring and correct as needed.

Switch may have been overloaded and contacts are burned out. Check the
output load, remembering to include inrush on inductive loads (coils, motors,
ballasts).

The jumper may be set in a range that is too high for current being monitored.
Move jumper to the correct range.

The setpoint may be too high. Turn pot counter-clockwise to decrease setpoint.

The monitored current may be below the minimum required. Loop the monitored
wire several times through the aperture until the “sensed” current rises above
the minimum. The sensed amps equals “actual amps” multiplied by the
“number of loops.” Count loops on the inside of the aperture.

For split core models, the contact area may be dirty. Open the sensor and clean
the contact area.

SPECIFICATIONS

AC Models DC Models

Power Supply Self Powered–No Power Supply Needed

Output Isolated Solid State Switch

Output Rating Standard Models: 1.0A @ 240V AC

Models Ending -04SC/-05SC:

3.0A @ 120V AC
Models Ending -06SC/07SC:
15A @ 120V AC
10A @ 240V AC

Off-State Leakage N.O. Models: < 10 µA

N.C. Models: 2.5 mA

Response Time 40-120 ms

Setpoint Range Solid Core Models: 1-6, 6-40, 40-175A

Split Core Models: 1.75-6, 6-40 and 40-200A

Hysteresis Low: 6%; Mid: 4%; High: 3%

Overload 1-6A: 6 sec. @ 400A; 1 sec. @ 600A

6-40A: 6 sec. @ 500A; 1 sec. @ 800A
40-175A: 6 sec. @ 800A; 1 sec. @ 1,200A

Isolation Voltage UL Listed to 1,270V AC, Tested to 5,000V AC

Frequency Range 6-100Hz

Sensing Aperture Solid Core, Front Terminal Models: 0.55 in. (14mm) dia.

Solid Core, Top Terminal Models: 0.74 in. (19mm) dia.
Split Core Models: 0.85 in. (21.6mm) sq.

Housing UL94 V0 Flammability Rated

Environmental Operating Temperature: -58 to +122° F (-50 to +50° C)

Approvals UL 508 Industrial Control Equipment (USA and Canada)

CE Certifi ed

Standard Models:

0.15A @ 30V DC
ECSJ430SC:

0.15A @ 30V DC
Form C SPDT

N.O. Models: < 10 µA
N.C. Models: 1.4 mA

0.01A

0.1A

0.5A

Effective: April 2007 Page 2

Questions? Call our Sensor Application Engineers at [phone].