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.
CR8400 SERIES
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.
Applications
Motor Load Measurement
Power Meters
High Frequency Current Sensing
Ground Fault Sensing
GENERAL PURPOSE CURRENT TRANSFORMERS
I
Part Number
CR8401-1000
CR8410-1000
CR8420-1000
CR8420-2000
CR8448-1000
CR8448-2000
CR8449-1000
CR8449-2000
CR8450-1000
CR8450-2000
r
Vmax RMS
2.2
Te (typ.)
1009
1012
1018
1983
990
DCR Ω
49
Frequency
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
10
20
50
75
30
50
50
75
3.1
5.2
9.0
6.3
13.7
11.6
23
16.5
32
41
22
90
26
106
35
150
21
Features
High Ratio
Custom Lead Lengths Available
2046
1016
2046
1021
2037
100
200
73
REVENUE GRADE CURRENT TRANSFORMERS
Specifications
Maximum Continuous Primary Current
Insulation Voltage
Storage Temp.
Operating Temp. General Purpose & Nickel -40°C thru +85 °C
Operating Temp. High Frequency
I
Part Number
CR8448-2500-N
CR8449-2500-N
CR8450-2500-N
CR8459-2000-N
r
Vmax RMS
6.6
Te (typ.)
2510
2490
2512
2011
DCR Ω
134
187
143
Frequency
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
4 X Ir
3500 Vac/1min
-45°C thru +85 °C
40
50
75
200
10.0
12.0
11.5
74
GROUND FAULT CURRENT TRANSFORMERS
I
Part Number
CR8401-1000-G
CR8410-1000-G
CR8420-1000-G
r
Vmax RMS
Te (typ.)
1005
1007
1011
DCR Ω
49
38
44
Frequency
20 Hz- 1 KHz
20 Hz- 1 KHz
20 Hz- 1 KHz
4
7
20
0.6
0.8
1.4
-40°C thru +65 °C
Regulatory Agencies
NANOCRYSTALLINE CURRENT TRANSFORMERS
I
Part Number
CR8401-1000-A
CR8410-1000-A
CR8420-1000-A
CR8420-2000-A
CR8448-1000-A
CR8448-2000-A
CR8448-2500-A
CR8449-1000-A
CR8449-2000-A
CR8449-2500-A
CR8450-1000-A
CR8450-2000-A
CR8450-2500-A
CR8459-2000-A
Vmax RMS
2.2
Te (typ.)
1034
1015
1023
2010
1000
2000
2524
1002
2013
2501
1003
2000
2501
2001
DCR Ω
43
39
43
89
25
103
131
35
144
182
21
72
134
73
Frequency
r
4
7
20
75
20
50
50
75
75
75
100
100
100
100
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
50 Hz- 50 KHz
2.5
1.3
7.0
6.0
13.0
16.0
11.0
16.0
27.0
15.0
26.0
28.0
27.0
I
DCR
R
V
I x DCR
I x R
VL =
Vmax -
V =
HIGH FREQUENCY CURRENT TRANSFORMERS
T
I
T
Part Number
CR8448-2000-F
CR8449-2000-F
CR8450-2000-F
r
Vmax RMS
Te (typ.)
2015
2017
2020
DCR Ω
90
109
63
Frequency
20 Hz - 200 KHz
20 Hz- 200 KHz
20 Hz- 200 KHz
e
e
50
75
100
3.9
7.4
8.5
F
For best linearity, choose R such that V < 0.8 V
L
V
L
I
= Maximum AC Input Current to be linearly sensed
V
= Maximum VAC (Saturation) CT will develop
r
max
= Effective turns ratio including losses (+/- 10%) (All Specifications tested at 60 Hz)
T
e
PACKAGE DIMENSIONS AND OUTLINE (mm/in)
A
min
B
max
C
max
D
max
E
Typ
Part Number Prefix
6.99
.275
9.0
.35
15.0
.59
7.11
.280
9.14
.354
13.08
.515
19
17.53
.690
22
.87
30.0
1.18
23.42
.922
22.35
.880
27.8
1.09
36.0
1.41
29.46
1.16
8.26
.325
8.20
.323
9.2
.36
11.05
.435
75.08
2.275
73
2.87
100
3.94
100
3.94
CR8401
CR8410
CR8420
CR8448
CR8449
CR8450
CR8459
I
B
D
A
C
26.0
31.8
17.0
100
1.02
36.83
1.45
48
1.25
43.18
1.70
60
.67
13.97
.55
17.5
.67
3.94
88.9
3.50
200
See Chart
.75
1.89
2.36
7.88
E
The Professional
Energy Monitoring
Company
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
M
N TI
95
ISO 9001:2008 Quality Management System
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