ECS LITTELFUSE | Alldatasheet
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Technical content
© 2018 Littelfuse Protection Relays & Controls www.littelfuse.com/ Rev: 1-A-062716 Protection Relays Current Monitoring Relays and Transducers www.littelfuse.com/ecs ECS SERIES
Description
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. Adjustment Select the desired function, over or under current sensing. Set the trip point and trip delay to approximate settings. Apply power to the ECS and the monitored load. Turn adjustment and watch the LED. LED will light; turn slightly in opposite direction until LED is off. Adjustment can be done while connected to the control circuitry if the trip delay is set at maximum. To increase sensitivity, multiple turns may be made through the ECS’s toroidal sensor. The appropriate trip point range is determined by multiplying the amperage load by the number of turns/passes through the toroidal sensor. When using an external CT , select a 2VA, 0-5A output CT rated for the current to be monitored. Select ECS adjustment range 0. Pass one secondary wire lead through the ECS toroid and connect the secondary leads together. Features & Benefits FEATURES BENEFITS Built-in toroidal current sensing Eliminates need to install stand-alone current transformer and provides isolation from monitored circuit Encapsulated Protects against shock, vibration, and humidity Adjustable mode, trip point and trip delay Provides flexibility for use in many applications 10A, SPDT isolated relay output Allows control of AC voltage loads Accessories P1015-13 (AWG 10/12), P1015-64 (AWG 14/16), P1015-14 (AWG 18/22) Female Quick Connect These 0.25 in. (6.35 mm) female terminals are constructed with an insulator barrel to provide strain relief. Wiring Diagram V = Voltage I> = Overcurrent I< = Undercurrent W = Insulated Wire Carrying Monitored Current Relay contacts are isolated. Arrow on the toroid points toward the load. Current Sensors
Ordering Information
See next page. Rev: 1-A-101218
© 2018 Littelfuse Protection Relays & Controls www.littelfuse.com/ Rev: 1-A-062716 Protection Relays Current Monitoring Relays and Transducers www.littelfuse.com/ecs ECS SERIES MODEL SENSING INPUT VOLTAGE TRIP POINT ADJUSTABLE TRIP DELAY SENSING DELAY ON STARTUP ECS20BC Selectable, over or undercurrent 24VAC 0.5 - 5A 0.5 - 50s 1s ECS21BC Selectable, over or undercurrent 24VAC 2 - 20A 0.5 - 50s 1s ECS2HBC Selectable, over or undercurrent 24VAC 5 - 50A 0.5 - 50s 1s ECS30AC Selectable, over or undercurrent 24VDC 0.5 - 5A 0.150 - 7s 1s ECS40A Selectable, over or undercurrent 120VAC 0.5 - 5A 0.150 - 7s 0s ECS40AC Selectable, over or undercurrent 120VAC 0.5 - 5A 0.150 - 7s 1s ECS40BC Selectable, over or undercurrent 120VAC 0.5 - 5A 0.5 - 50s 1s ECS41A Selectable, over or undercurrent 120VAC 2 - 20A 0.150 - 7s 0s ECS41AC Selectable, over or undercurrent 120VAC 2 - 20A 0.150 - 7s 1s ECS41BC Selectable, over or undercurrent 120VAC 2 - 20A 0.5 - 50s 1s ECS41BD Selectable, over or undercurrent 120VAC 2 - 20A 0.5 - 50s 2s ECS41BH Selectable, over or undercurrent 120VAC 2 - 20A 0.5 - 50s 6s ECS4HBC Selectable, over or undercurrent 120VAC 5 - 50A 0.5 - 50s 1s ECS4HBH Selectable, over or undercurrent 120VAC 5 - 50A 0.5 - 50s 6s ECS60AH Selectable, over or undercurrent 230VAC 0.5 - 5A 0.150 - 7s 6s ECS60BC Selectable, over or undercurrent 230VAC 0.5 - 5A 0.5 - 50s 1s ECS61BC Selectable, over or undercurrent 230VAC 2 - 20A 0.5 - 50s 1s ECS6HAH Selectable, over or undercurrent 230VAC 5 - 50A 0.150 - 7s 6s ECSH21F2.5C Overcurrent 24VAC 2 - 20A 2.5s 1s ECSH30AC Overcurrent 24VDC 0.5 - 5A 0.150 - 7s 1s ECSH31AD Overcurrent 24VDC 2 - 20A 0.150 - 7s 2s ECSH31F.08D Overcurrent 24VDC 2 - 20A 0.08s 2s ECSH3HF0.08D Overcurrent 24VDC 5 - 50A 0.08s 2s ECSH34F.08C Overcurrent 24VDC 4A non-adjustable 0.08s 1s ECSH40A Overcurrent 120VAC 0.5 - 5A 0.150 - 7s 0s ECSH40AC Overcurrent 120VAC 0.5 - 5A 0.150 - 7s 1s ECSH40AD Overcurrent 120VAC 0.5 - 5A 0.150 - 7s 2s ECSH41AC Overcurrent 120VAC 2 - 20A 0.150 - 7s 1s ECSH41AD Overcurrent 120VAC 2 - 20A 0.150 - 7s 2s ECSH41BC Overcurrent 120VAC 2 - 20A 0.5 - 50s 1s ECSH41F.08D Overcurrent 120VAC 2 - 20A 0.08s 2s ECSH4HAD Overcurrent 120VAC 5 - 50A 0.150 - 7s 2s ECSH4HF.08D Overcurrent 120VAC 5 - 50A 0.08s 2s ECSH61AD Overcurrent 230VAC 2 - 20A 0.150 - 7s 2s ECSL31A Undercurrent 24VDC 2 - 20A 0.150 - 7s 0s ECSL40AC Undercurrent 120VAC 0.5 - 5A 0.150 - 7s 1s ECSL40B Undercurrent 120VAC 0.5 - 5A 0.5 - 50s 0s ECSL40BH Undercurrent 120VAC 0.5 - 5A 0.5 - 50s 6s ECSL41A Undercurrent 120VAC 2 - 20A 0.150 - 7s 0s ECSL41AD Undercurrent 120VAC 2 - 20A 0.150 - 7s 2s ECSH4HAD Overcurrent 120VAC 5 - 50A 0.150 - 7s 2s ECSL41AH Undercurrent 120VAC 2 - 20A 0.150 - 7s 6s ECSL4HAC Undercurrent 120VAC 5 - 50A 0.150 - 7s 1s ECSL4HBH Undercurrent 120VAC 5 - 50A 0.5 - 50s 6s ECSL61AH Undercurrent 230VAC 2 - 20A 0.150 - 7s 6s ECSL6HAC Undercurrent 230VAC 5 - 50A 0.150 - 7s 1s If you don’t find the part you need, call us for a custom product 800-843-8848 Rev: 1-A-101218
© 2018 Littelfuse Protection Relays & Controls www.littelfuse.com/ Rev: 1-A-062716 Protection Relays Current Monitoring Relays and Transducers www.littelfuse.com/ecs ECS SERIES Specifications Sensor Type Toroidal through hole wiring Mode Over or undercurrent, switch selectable on the unit or factory fixed Trip Point Range 0.5 - 50A in 3 adjustable ranges or fixed Tolerance Adjustable Guaranteed range Fixed 0.5 - 25A: 0.5A or ±5% whichever is less; 26 - 50A: ±2.5% Maximum Allowable Current Steady – 50A turns; Inrush – 300A turns for 10s Trip Point Hysteresis ≅ ±5% Trip Point vs. Temperature ±5% Response Time ≤ 75ms Frequency 45/500 Hz Type of Detection Peak detection Trip Delay Type Analog Range Adjustable 0.150 - 7s; 0.5 - 50s (guaranteed ranges) Factory Fixed +/- 10% Delay vs. Temperature ±15% Sensing Delay on Startup Factory fixed 0 - 6s: +40%, -0% Input Voltage 24 , 120, or 230VAC; 12 or 24VDC Tolerance 12VDC & 24VDC/AC -15 - 20% 120 & 230VAC -20 - 10% AC Line Frequency 50/60 Hz Output Type Electromechanical relay Form Isolated, SPDT Rating 10A resistive @ 240VAC; 1/4 hp @ 125VAC; 1/2 hp @ 250VAC Life Mechanical – 1 x 10 6 ; Electrical – 1 x 10 5 Protection Circuitry Encapsulated Isolation Voltage ≥ 2500V RMS input to output Insulation Resistance ≥ 100 MΩ Mechanical Mounting Surface mount with two #6 (M3.5 x 0.6) screws Dimensions H 88.9 mm (3.5”); W 63.5 mm (2.5”); D 44.5 mm (1.75”) Termination 0.25 in. (6.35 mm) male quick connect terminals (5) Environmental Operating/Storage Temperature -40° to 60°C / -40° to 85°C Humidity 95% relative, non-condensing Weight ≅ 6.4 oz (181 g) NO = Normally Open Contact NC = Normally Closed Contact A = Sensing Delay On Start Up TD = Trip Delay TP = Trip Point R = Reset OC = Monitored Current Function Diagrams Overcurrent Sensing Undercurrent Sensing Rev: 1-A-101218 Disclaimer Notice – Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/product-disclaimer.