www.littelfuse.com/efct
Rev: 1-A-111215
Accessories
Current Transformers
© 2015 Littelfuse Protection Relays & Controls
EFCT SERIES
EFCT-26
EFCT-2
EFCT-1
SECONDARY EXCITING VOLTAGE (VOLTS)
1.0
5.0
0.1
0.01
SECONDARY EXCITING CURRENT (MILLIAMPERES)
1.0
50.0
0.1
10.0
Current Sensor
Description
The EFCT series is a sensitive nickel-core current
transformer used with Littelfuse relays to detect low levels
of earth-leakage current.
Accessories
EFCT-1FC Flux Conditioner
used with the EFCT-1 to reduce saturation
and prevent false operation due to large
surge currents.
Specifications
Turns Ratio 100:1
Current Rating 5:0.05 A
Accuracy 3% @ 0.01 VA
Frequency 50 to 400 Hz
1
0 to 6 kHz for EL731
Insulation Level 600 V
Operating Temperature -55 to 60ºC (-67 to 140ºF)
Application EL731, FPU-32, FPS, MPU-32, MPS, SE-330,
SE-701, SE-703
Certification CSA, UL, CE
Compliance RoHS, IEC 60044-1
Note: 1 Frequency response may be extended for specific product families.
Ordering Information
ORDERING NUMBER WINDOW SIZE, ID WEIGHT
EFCT-26 26 mm (1.0”) 0.4 kg (1 lb)
EFCT-1 82 mm (3.2”) 0.9 kg (2 lb)
EFCT-2 139 mm (5.5”) 2.7 kg (6 lb)
