Protection Relays Current Monitoring Relays and Transducers Llttelfuse* Expertise Applied | Answers Delivered ECSW SERIES Current Sensors C€TO€ Wiring Diagram Description The ECSW Series of single-phase, AC window, current sensors includes adjustable overcurrent and undercurrent trip points. Detects locked rotor, jam, loss of load, an open heater or lamp load, a broken belt, or loss of suction. LED's aid in trip point adjustment and provide fault indication. The built-in toroidal sensor eliminates the need for an external current transformer. The output can be electrically latched after a fault, or automatically reset. Remote resetting of a latched output by removing input voltage. The unit includes switch selectable zero current detection and normally de-energized or energized output operation. Time delays are included to improve operation and eliminate nuisance tripping. Features & Benefits FEATURES Built-in toroidal current sensing Eliminates need to install stand alone current transformer and provides isolation from monitored circuit Encapsulated LED indication Protects against shock, vibration, and humidity Visual indication for trip point adjustment and fault indication Multiple switch selectable features Adjustable trip delay User selectable zero current detection, latched, normally de-energized, or energized output adds application flexibility Eliminates nuisance tripping and prevents rapid cycling Isolated 10A, SPDT output contacts Allows control of loads for AC or DC voltages I> = Adjustable Overcurrent I< = Adjustable Undercurrent W = Monitored Wire AT - Adjustable Trip Delay When the input voltage is applied, sensing delay on startup begins and the output transfers (if normally energized is selected). Upon completion of the startup delay, sensing of the monitored current begins. As long as current is above undercurrent trip point and below the overcurrent trip point (inside the window), the output relay remains in its normal operating condition and both red LED's are OFF The green LED glows when the output is energized. If current varies outside the window, the associated red LED glows, and the trip delay begins. If the current remains outside the window for the full Ordering Information MODEL INPUT VOLTAGE TRIP POINT ADJUST. TRIP DELAY SENSING DELAY ON STARTUP CONNECT. If you don't find the part you need, call us for a custom product 800-843-8848 © 2016 Littelfuse Protection Relays & Controls www.littelfuse.com/ecsw

Expertise Applied | Answers Delivered Protection Relays Current Monitoring Relays and Transducers trip delay, the relay transfers to fault condition state. If the current returns to normal levels (inside the window) during the trip delay, the red LED goes OFF, the trip delay is reset, and the output remains in the normal condition. Reset: Remove input voltage or open latch switch. If zero current detection is selected, the unit will reset as soon as zero current is detected. Operation With Zero Current Detection Enabled: If the current decreases to zero within the trip delay period, then zero...

Protection Relays Current Monitoring Relays and Transducers ECSW SERIES Specifications Sensor Type Toroid, through hole wiring for up to #4 AWG (21.1 mm2) THHN wire Mode Over & undercurrent trip points (window current sensing) Trip Point Range 0.5 - 50A in 3 adjustable ranges Tolerance Guaranteed range Maximum Allowable Current Steady - 50A turns; Inrush - 300A turns for 10s Time Point vs Temp. & Voltage ±5% Response Time ≤ 75ms Frequency 45/500 Hz Type of Detection Peak detection Zero Current Detection < 250mA turns typical Time Delay Range 0.15 - 50s in 2 adjustable ranges or 0.1 - 50s fixed...