Handbook of Application

Current Switches
The Series are intended to monitor the operating status of fans, pumps, and motors. These self-powered switches can be hung or tied directly to cables or wires. For use on existing installation, split core models can be installed without disconnecting cables. LED indicators provide a visual confirmation that the current is passing through the core. Both fixed and adjustable set points are available. The adjustable models easily adjust the set point with a potentiometer.

Operating Instructions
The Series of Current Switches offer an input to equipment under normal operating conditions. Where failure or malfunction of the current switch could result in personal injury or property damage to the controlled equipment or other property, additional precautions, must be designed into the control system. Incorporate and maintain other devices such as supervisory or alarm systems or safety or limit controls intended to warn of, or protect against, failure or malfunction of the Series.

Risk of Shock
Disconnect power supply before making electrical connections. Contact with components carrying hazardous voltage can cause electrical shock and may result in severe personal injury or death.

Installation
Mounting
1. Ensure that the power supply to the circuit is off.
2. For solid core devices: Disconnect the circuit line, slide the power conductor cable through the sensing hole of the current switch, and reconnect the circuit line.
For split core devices: Open the core using the release tab. Snap the core closed around the power conductor cable. Make sure that the core release tab is locked in its original position.
3. Connect the switch circuit to the two screw terminals using ring or fork type terminals.
4. Turn circuit back on.

Specifications
Amperage Range: 0~200A AC
Maximum Switch Rating:
For fixed set point models: 0.3A@135V AC/DC
For adjustable set point models: 1A@240V AC
Output: Normally open.
Power Requirements: None, Self-powered.
Operating Temperature: -30~70 centigrade degrees
Operating Humidity: 0~95%(non-condensing).
Frequency: 40~400Hz
Enclosure Rating: UL, 94 V-O flammability rated, ABS plastic housing.
Approvals: UL & cUL CE & RoHS

LED Indicators
Green LED: Indicates that current is passing through the core, but the set point has not been reached and the contacts are open.
Red LED: Indicates that the set point has been reached and the contacts are now closed.

Increasing Measured Current
If measured current is too low to be detected:
Wrap the conductor (wire) through the sensing hole and around the FCS body to produce multiple turns to increase the measured current. Use the below equation to determine how many wraps are necessary: Measured current=Actual Current × The Number of Turns
Notice: Failure to derate the current capacity could cause damage to the sensors when using multiple turns to increase the measured current. Use the following formula to determine the new maximum current: Current=200A/4=50A
Set Point Calibration (for adjustable models only)
The output switch of all devices is open. When the monitored current exceeds the trip value as set by the set point calibration, the switch will close. The red LED light will indicate that this change has occurred.

The Series of current switches are factory set at the minimum switch point (adjustment fully clockwise)
To Increase the set point:
Use the potentiometer to adjust the range:
A. Confirm that the monitored load is on.
B. Turn the adjustment counter-clockwise, until the output turns off as indicated by the red LED.
C. Then turn the adjustment clockwise, until the red LED comes back on indicating that the output is now on...
Notice: The adjustment should be turned slightly clockwise past a certain point to ensure normal line current variations do not cause false conditions.