ECS01E2S 03.29.04 Description Over/Under Current Sensing The ECS Series of Single Phase AC Current Sensors is a universal, overcurrent or undercurrent sensing ECS Series control. Its built-in toroidal sensor eliminates the inconvenience of installing a stand-alone current Current Sensor 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. 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. Relay contacts are isolated. Operation Dashed line are internal connections. When a fault is sensed throughout the trip delay, the output relay is energized. When the current returns Overcurrent to the normal run condition, the output and the delay are reset. If a fault is sensed and then corrected Toroidal Through Hole Wiring before the trip delay is completed, the relay will not 0.5...20 A Trip Point energize and the trip delay is reset to zero. Adjustable or Factory Fixed Trip Delays 10 A SPDT Isolated Output Contacts Approvals: 5% Trip Point Hysteresis (Dead Band) Input Voltage Trip Point Adjustable Trip Delay Adjustable Start Up Delay Part Number Undercurrent 24 V AC 0.5 ... 5 A 0.5 ... 50 s 1 s ECS20BC 24 V AC 2 ... 20 A 0.5 ... 50 s 1 s ECS21BC 120 V AC 0.5 ... 5 A 0.5 ... 50 s 1 s ECS40BC 120 V AC 2 ... 20 A 0.5 ... 50 s 1 s ECS41BC V = Voltage W = Insulated Wire Carrying Monitored Current I> = Overcurrent I< = Undercurrent TP = Trip Point R = Reset OC = Monitored Current NO = Normally Open Other Combinations and Delays are Available Including Fixed Set Points, 24 V AC, 230 V AC Contact NC = Normally Closed Contact Technical Data A = Sensing Delay On Start Up TD = Trip Delay Sensor Type Toroidal, through hole wiring Mode Over or undercurrent, switch selectable on the unit or factory fixed Trip Point Range 0.5 ... 20 A in 2 adjustable ranges or fixed Tolerance: Adjustable Guaranteed range Fixed 0.5 ... 25 A: 0.5 A or +/-5% whichever is less Maximum Allowable Current Steady – 50 A turns; Inrush – 300 A turns for 10 s Trip Point Hysteresis ≅ +/-5% Trip Point vs. Temperature +/-5% Multiple Turns To Increase Sensitivity Response Time ≤ 75 ms To increase sensitivity, multiple turns may be made Frequency 45 ... 500 Hz through the ECS's toroidal sensor. The trip point Type of Detection Peak detection range is divided by the number of turns through the Trip Delay toroidal sensor to create a new range. Type Analog Using an External Current Transformer (CT) Range: Adjustable 0.150 ... 7 s; 0.5 ... 50 s (Guaranteed ranges) Select a 2 VA, 0 to 5 A output CT, rated for the Factory Fixed 0.08 ... 50 s (+/-10%) current to be monitored. Select ECS adjustment Delay vs. Temperature +/-15% range 0. Pass the CT's secondary wire lead Sensing Delay on Startup Factory fixed 0 ... 6 s +40% ... 0% through the ECS's toroid. Input Voltage 24 , 120, or 230 V AC; 12 or 24 V DC Tolerance 12 V DC & 24 V DC/AC -15% ... +20% 120 & 230 V AC -20% ... +10% Line Frequency 50 ... 60 Hz Output Type Electromechanical relay Form Isolated single pole double throw (SPDT) Rating 10 A resistive at 240 V AC; 1/4 hp at 125 V AC; 1/2 hp at 250 V AC 6 5 Life Mechanical – 1 x 10 ; Electrical – 1 x 10 Protection Circuitry Encapsulated Isolation Voltage ≥ 2500 V RMS input to output Insulation Resistance ≥ 100 MΩ Mechanical Inches (Millimeters) Mounting Surface mount with two #6 (M3.5 x 0.6) screws Termination 0.25 in. (6.35 mm) male quick connect terminals (5) Accessories Humidity 95% relative, non-condensing Female quick connect P/Ns: Operating/Storage Temperature -40°C ... +60°C / -40°C ... +85°C P1015-13 (AWG 10/12) Weight ≅ 6.4 oz (181 g) P1015-64 (AWG 14/16) P1015-14 (AWG 18/22) See accessory pages for specifications. www.ssac.com 25