95
Current Transformers
F
3500 Scarlet Oak Blvd. St. Louis MO USA 63122 V: 636-343-8518 F: 636-343-5119
Web: http://www.crmagnetics.com -- E-mail: sales@crmagnetics.com
The Professional
Energy Monitoring
Company
ISO 9001:2008 Quality Management System
M
NTI
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 (-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) are for measuring low AC currents including electrical shields.
Nanocrystalline (-A) is the most versatile providing accuracy, high saturation point and a
linear response in high frequency applications. The High Frequency (-F) products are
designed for high frequency applications such as high frequency power supplies and motor drives.
CR8400 SERIES
Ir= Maximum AC Input Current to be linearly sensed Vmax = Maximum VAC (Saturation) CT will develop
Te= Effective turns ratio including losses (+/- 10%) (All Specifications tested at 60 Hz)
Applications
Motor Load Measurement
Power Meters
High Frequency Current Sensing
Ground Fault Sensing
Features
High Ratio
Custom Lead Lengths Available
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
VL
I
I
V
R
DCR
For best linearity, choose R such that V < 0.8 VL
B
A
D
C
E
GENERAL PURPOSE CURRENT TRANSFORMERS
Part Number IrVmax RMS Te (typ.) DCR Ω
Frequency
CR8401-1000 10 2.2 1009 49
20
Hz
- 1 KHz
CR8410-1000 20 3.1 1012 41
20
Hz
- 1 KHz
CR8420-1000 50 5.2 1018 22
20
Hz
- 1 KHz
CR8420-2000 75 9.0 1983 90
20
Hz
- 1 KHz
CR8448-1000 30 6.3 990 26
20
Hz
- 1 KHz
CR8448-2000 50 13.7 2046 106
20
Hz
- 1 KHz
CR8449-1000 50 11.6 1016 35
20
Hz
- 1 KHz
CR8449-2000 75 23 2046 150
20
Hz
- 1 KHz
CR8450-1000 100 16.5 1021 21
20
Hz
- 1 KHz
CR8450-2000 200 32 2037 73
20
Hz
- 1 KHz
REVENUE GRADE CURRENT TRANSFORMERS
Part Number IrVmax RMS Te (typ.) DCR Ω
Frequency
CR8448-2500-N 40 6.6 2510 134
20
Hz
- 1 KHz
CR8449-2500-N 50 10.0 2490 187
20
Hz
- 1 KHz
CR8450-2500-N 75 12.0 2512 143
20
Hz
- 1 KHz
CR8459-2000-N 200 11.5 2011 74
20
Hz
- 1 KHz
GROUND FAULT CURRENT TRANSFORMERS
Part Number IrVmax RMS Te (typ.) DCR Ω
Frequency
CR8401-1000-G 40.6 1005 49
20
Hz
- 1 KHz
CR8410-1000-G 70.8 1007 38
20
Hz
- 1 KHz
CR8420-1000-G 20 1.4 1011 44
20
Hz
- 1 KHz
NANOCRYSTALLINE CURRENT TRANSFORMERS
Part Number
Ir
Vmax RMS Te (typ.) DCR Ω
Frequency
CR8401-1000-A 42.2 1034 43
50 Hz- 50 KHz
CR8410-1000-A 72.5 1015 39
50 Hz- 50 KHz
CR8420-1000-A 20 1.3 1023 43
50 Hz- 50 KHz
CR8420-2000-A 75 7.0 2010 89
50 Hz- 50 KHz
CR8448-1000-A 20 6.0 1000 25
50 Hz- 50 KHz
CR8448-2000-A 50 13.0 2000 103
50 Hz- 50 KHz
CR8448-2500-A 50 16.0 2524 131
50 Hz- 50 KHz
CR8449-1000-A 75 11.0 1002 35
50 Hz- 50 KHz
CR8449-2000-A 75 16.0 2013 144
50 Hz- 50 KHz
CR8449-2500-A 75 27.0 2501 182
50 Hz- 50 KHz
CR8450-1000-A 100 15.0 1003 21
50 Hz- 50 KHz
CR8450-2000-A 100 26.0 2000 72
50 Hz- 50 KHz
CR8450-2500-A 100 28.0 2501 134
50 Hz- 50 KHz
CR8459-2000-A
100 27.0 2001 73
50 Hz- 50 KHz
HIGH FREQUENCY CURRENT TRANSFORMERS
Part Number IrVmax RMS Te (typ.) DCR Ω
Frequency
CR8448-2000-F 50 3.9 2015 90
20 Hz - 200 KHz
CR8449-2000-F 75 7.4 2017 109
20 Hz- 200 KHz
CR8450-2000-F 100 8.5 2020 63
20 Hz- 200 KHz
PACKAGE DIMENSIONS AND OUTLINE (mm/in)
Part Number Prefix A
min
B
max
C
max
D
max
E
Typ
CR8401 6.99
.275
17.53
.690
22.35
.880
8.26
.325
75.08
2.275
CR8410 9.0
.35
22
.87
27.8
1.09
8.20
.323
73
2.87
CR8420 15.0
.59
30.0
1.18
36.0
1.41
9.2
.36
100
3.94
CR8448 7.11
.280
23.42
.922
29.46
1.16
11.05
.435
100
3.94
CR8449 9.14
.354
26.0
1.02
31.8
1.25
17.0
.67
100
3.94
CR8450 13.08
.515
36.83
1.45
43.18
1.70
13.97
.55
88.9
3.50
CR8459 19
.75
48
1.89
60
2.36
17.5
.67
200
7.88
See Chart
V = I x R
Te
VL=Vmax -Te
I x DCR
