ECSL40BH - ECS Series

Series: ECS
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The ECS Series of single-phase AC current sensors is a universal, overcurrent or undercurrent sensing control. Its built-in toroidal sensor eliminates the inconvenience of installing a stand-alone current transformer. Includes onboard adjustments for current sensing mode, trip point, and trip delay. Detects over or undercurrent events like locked rotor, loss of load, an open heater or lamp load, or proves an operation is taking place or has ended.


Operation
Input voltage must be supplied at all times for proper operation. When a fault is sensed throughout the trip delay, the output relay is energized. When the current returns to the normal run condition or zero, the output and the delay are reset. If a fault is sensed and then corrected before the trip delay is completed, the relay will not energize and the trip delay is reset to zero.

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Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Property (Mouseover for details) Value
Input Voltage (V) 120 Vac
Input Tolerance (%) -20 - 10%
Input AC Line Frequency (Hz) 50 / 60
Output Type Electromechanical relay
Output Form Isolated SPDT
Output Load Rating (VA) 10 A resistive @ 240 Vac; 1/4 hp @ 125 Vac; 1/2 hp @ 250 Vac
Response Time (ms) ≤75 ms
Trip Delay Type Analog
Trip Delay Range 0.5 - 50 s adjustable
Trip Delay Sensing on Startup (s) Factory fixed 0 - 6 s: +40%; -0%
Trip Delay vs Temperature ±15%
Trip Point Range 0.5 - 5 adjustable
Trip Point Hysteresis (%) ±5%
Trip Point vs Temperature ≅±5%
Sensor Type Toroid; through-hole wiring
Sensor Mode Over or undercurrent; switch selectable on the unit or factory fixed
Sensor Tolerance Guaranteed range
Current Sensor Range Maximum: Steady - 50A turns; Inrush - 300A turns for 10s
Sensor Frequency (Hz) 45/500
Insulation Resistance ≥100
Type of Detection Peak detection
Termination Type 0.25 in. (6.35 mm) male quick connect terminals (5)
Mounting Method Surface mount with two #6 (M3.5 x 0.6) screws
Operating Temperature -40° to 60°C (-40° to 140°F)
Storage Temperature (F/C) -40° to 85°C (-40° to 185°F)
Humidity 95% non-condensing
Dimensions 3.5 H x 2.5 W x 1.75 D in. (88.9 x 63.5 x 44.5 mm)
Weight (lbs/g) 0 Kg
Check Stock Yes

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