High Ratio Wire Lead Transformers
CR Magnetics CR8400 Series of Wire Lead Current Transformers are
available in a wide range of sizes and materials to meet any AC current
sensing needs. Our General Purpose designs are made from the
highest quality silicon steel cores available, and meet most of the common AC
current measurement needs. Our Revenue Grade CTs (-N) are made from a
nickel alloy core which provides the most linear response over
temperature and current level. A line of Ground Fault (-G) CTs for measur-
ing low AC currents including electrical shields. The High Frequency (-F)
products are designed for high frequency applications such as high frequency power
supplies and motor drives.
CR8400 SERIES
I
r
= Maximum Input Current to be linearly sensed V
max
= Maximum Voltage (Saturation) CT will develop
T
e
= Effective turns ratio including losses (All Specifications tested at 60 Hz)
Applications
Motor Load Measurement
Power Meters
High Frequency Current Sensing
Ground Fault Sensing
Features
High Ratio
Standard Footprints
Specifications
Maximum Continuous Primary Current 4 X Ir
Insulation Voltage 3500 Vac/1min
Storage Temp. -45°C thru +85 °C
Operating Temp. General Purpose & Nickel -40°C thru +85 °C
Operating Temp. High Frequency -40°C thru +65 °C
Regulatory Agencies
GENERAL PURPOSE CURRENT TRANSFORMERS
Part Number
I
r
Vmax RMS Te (typ.)
DCR Ω
Frequency
CR8401-1000 10 2.2 1009 49 20 - 1 KHz
CR8410-1000 20 3.1 1012 41 20 - 1 KHz
CR8420-1000 50 5.2 1018 22 20 - 1 KHz
CR8420-2000 75 9.0 1983 90 20 - 1 KHz
CR8448-1000 30 6.3 990 26 20 - 1 KHz
CR8448-2000 50 13.7 2046 106 20 - 1 KHz
CR8449-1000 50 11.6 1016 35 20 - 1 KHz
CR8449-2000 75 23 2046 150 20 - 1 KHz
CR8450-1000 100 16.5 1021 21 20 - 1 KHz
CR8450-2000 200 32 2037 73 20 - 1 KHz
REVENUE GRADE CURRENT TRANSFORMERS
Part Number
I
r
Vmax RMS Te (typ.)
DCR Ω
Frequency
CR8448-2500-N 40 6.6 2510 134 20 - 1 KHz
CR8449-2500-N 50 10.0 2490 187 20 - 1 KHz
CR8450-2500-N 75 12.0 2512 143 20 - 1 KHz
CR8459-2000-N 200 11.5 2011 74 20 - 1 KHz
GROUND FAULT CURRENT TRANSFORMERS
Part Number
I
r
Vmax RMS Te (typ.)
DCR Ω
Frequency
CR8401-1000-G 4 0.6 1005 49 20 - 1 KHz
CR8410-1000-G 7 0.8 1007 38 20 - 1 KHz
CR8420-1000-G 20 1.4 1011 44 20 - 1 KHz
HIGH FREQUENCY CURRENT TRANSFORMERS
Part Number
I
r
Vmax RMS Te (typ.)
DCR Ω
Frequency
CR8448-2000-F 50 3.9 2015 90 20 - 200 KHz
CR8449-2000-F 75 7.4 2017 109 20 - 200 KHz
CR8450-2000-F 100 8.5 2020 63 20 - 200 KHz
V =
I x R
T
e
V
L
I
