P51916
Rev 02
Effective: January 2008
Page 2
Questions? Call our Sensor Application Engineers at (800) 426-9184.
RANGES AND MAXIMUM AMPS
Housing
Style
Setpoint
Outputs
Maximum Input Amps
Continuous
6 sec.
1 sec.
Solid Core
Fixed (1.0A)
N.O.
250A
400A
1,000A
N.C.
150A
400A
1,000A
Adjustable (1-150A)
N.O.
150A
400A
1,000A
N.C.
150A
400A
1,000A
Split Core
Fixed (1.5A)
N.O.
250A
400A
1,000A
N.C.
150A
400A
1,000A
Adjustable
(1.75-150A)
N.O.
150A
400A
1,000A
N.C.
150A
400A
1,000A
SETPOINT ADJUSTMENT
The CurrentWatch™ ECS Series setpoint is adjusted with a four-turn
potentiometer (for models ending -SP) or a fi fteen-turn potentiometer
(for models ending -SC). The pot is shipped factory set to the lowest
setpoint, fully clockwise. 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
voltage to the contacts and 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.
• Mounting can be done in any position or hung directly on wires
with a wire tie
Typical Adjustment Steps
1. Turn the pot to the minimum setpoint (four or fi fteen 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
WIRING DIAGRAM
Connect control or monitoring wires to the sensor. Use up to
14 AWG copper wire and tighten terminals to 5 inch-pounds torque. Be
sure the output load does not exceed the switch rating.
CAUTION! Incandescent
lamps can have “cold
fi lament inrush” current
of up to ten times their
rated amperage. Use
caution when switching
lamps.
TROUBLESHOOTING
Problem
Solution
Switch is
always tripped
The setpoint may be too low. Turn the pot counter-clockwise to
increase the setpoint.
The switch may have been overloaded and the contacts are
burned out. Check the output load, remembering to include inrush
on inductive loads (coils, motors, ballasts).
Switch will
not trip
The setpoint may be too high. Turn the pot clockwise to decrease
the setpoint.
On split core models, the core contact area may be dirty. Open the
switch and clean the contact area.
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.
The switch may have been overloaded and the contacts are
burned out. Check the output load, remembering to include inrush
on inductive loads (coils, motors, ballasts).
SPECIFICATIONS
Solid Core
Split Core
Power Supply
Self Powered–No Power Supply Needed
Output
Magnetically Isolated Solid-State Switch
Output Rating
Normally Open Models: 0.15A, 240V AC/DC
Normally Closed Models: 0.20A, 135V AC/DC
Off-State Leakage
< 10 µA
Response Time
120 ms
Adjustable Setpoint Range
1-150A
1.75-150A
Setpoint Adjustment
15-Turn Potentiometer
4-Turn Potentiometer
Fixed Setpoints
1.0A
1.5A
Hysteresis
Approximately 5% of Setpoint
Overload
Fixed Setpoint, N.O. Models: 6 sec. @ 500A; 1 sec. @ 1,000A
All Other Models: 6 sec. @ 400A; 1 sec. @ 1,000A
Isolation Voltage
UL Listed to 1,270V AC, Tested to 5,000V AC
Frequency Range
6-100Hz
Sensing Aperture
0.74 in. (19mm)
0.85 in. (21.6mm)
Housing
UL94 V0 Flammability Rated
Environmental
Operating Temperature: -58 to +122° F (-50 to +50° C)
Humidity: 0-95% RH, Non-Condensing
Approvals
UL and ULC Listed
CE Certifi ed
392500221
AC or DC
Power
AC or DC
Load
Monitored Wire
Current Switch
Use caution when
switching lamps
