Cut Sheet

© 2016 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 Diagram