MR SERIES MEASURING RANGE
TE’S CROMPTON INSTRUMENTS
FEATURES
• Available in a wide range
of transformer ratings
• Accuracy up to class 0.5
• Measuring or protective
types
BENEFITS
• Long product life
APPLICATIONS
• Switchgear
• Control panels
• Overload protection
• Control devices
DIMENSIONS
A comprehensive range of measuring ring current transformers for
installation where reliability, accuracy and quality are required.
High grade silicon iron cores are carefully selected, then insulated and
protected by a polypropylene covering on which the secondary winding is
toroidally wound by precision winding machines. Multi layers of polyester
and PVC are then applied to provide a tough moisture resistant coating.
SPECIFICATIONS
System voltage:
Test voltage:
System frequency:
Overload withstand:
Short circuit thermal:
Dynamic current (Idyn)*:
Service temperature:
Secondary current:
Complies with:
Saturation coefficient:
Humidity:
Insulation class:
Mounting hardware:
720 V maximum
3 kV for 1 minute
50/60 Hz
1.2 x rated current continuously
60 x rated primary current for 1 second current (Ith)*:
= 2.55 x Ith
-20°C to 70°C
5 A or 1 A
IEC60044-1, BS EN60044-1
<6
Up to 95% RH (non condensing)
BS EN60085 Class Y
Foot mounted
* Thermal current (Ith) & dynamic current (ldyn).
lth is the highest primary current (effective value), the ldyn is the
highest primary current (peak value) that the CT can support for 1
second without damage, owing to excessive overloads with secondary
short circuits.
Customers can count on consistent, high quality products, driven by TE’s
proven innovation and backed by our extraordinary customer support.
ENERGY
/// MR SERIES MEASURING RANGE
MR series measuring range
MR transformers are used to accurately measure high alternating primary currents, converting the primary current into a
proportional secondary current as required for measurement and instrumentation. They are available in 5 amp or 1 amp
secondary versions.
PART NUMBER
MR-28-40/5A
MR-28-50/5A
MR-28-60/5A
MR-28-40/1A
MR-28-50/1A
MR-28-60/1A
MR-42-80/5A
MR-42-100/5A
MR-42-150/5A
MR-42-200/5A
MR-42-250/5A
MR-42-80/1A
MR-42-100/1A
MR-42-150/1A
MR-42-200/1A
MR-42-250/1A
MR-45-300/5A
MR-45-400/5A
MR-45-300/1A
MR-45-400/1A
MR-60-400/5A
MR-60-500/5A
MR-60-600/5A
MR-60-400/1A
MR-60-500/1A
MR-60-600/1A
MR-85-800/5A
MR-85-1000/5A
MR-85-1200/5A
MR-85-1500/5A
MR-85-1600/5A
MR-85-800/1A
MR-85-1000/1A
MR-85-1200/1A
MR-85-1500/1A
MR-85-1600/1A
MR-125-2000/5A
MR-125-2500/5A
MR-125-3000/5A
MR-125-4000/5A
MR-125-2000/1A
MR-125-2500/1A
MR-125-3000/1A
MR-125-4000/1A
RATIO RANGE
40/5
50/5
60/5
40/1
50/1
60/1
80/5
100/5
150/5
200/5
250/5
80/1
100/1
150/1
200/1
250/1
300/5
400/5
300/1
400/1
400/5
500/5
600/5
400/1
500/1
600/1
800/5
1000/5
1200/5
1500/5
1600/5
800/1
1000/1
1200/1
1500/1
1600/1
2000/5
2500/5
3000/5
4000/5
2000/1
2500/1
3000/1
4000/1
CLASS 3
1.5
2
2.5
1.5
2
2.5
1.5
3.75
5
7.5
10
1.5
5
5
7.5
10
10
15
10
15
15
15
20
15
20
20
20
30
30
30
30
20
25
25
25
25
30
30
30
30
25
25
25
25
CLASS 1
-
-
-
-
-
-
-
1.25
2.5
5
5
-
1.5
3
5
7.5
7.5
7.5
10
10
7.5
10
10
7.5
15
15
10
15
15
15
15
15
20
20
20
20
20
20
20
20
20
20
20
20
CLASS 0.5
-
-
-
-
-
-
-
-
1
2.5
2.5
-
-
-
3
2.5
3.75
5
5
5
5
5
7.5
5
5
10
7.5
10
10
10
10
10
15
15
15
15
15
15
15
15
15
15
15
15
A
28
28
28
22
22
22
42
42
42
42
42
40
40
40
40
40
45
45
45
45
60
60
60
58
58
58
85
85
85
85
85
84
94
94
94
94
125
125
125
125
132
132
125
140
B
70
70
70
60
60
60
80
80
80
80
80
72
72
72
72
72
80
80
83
83
100
100
100
100
100
100
124
124
124
124
124
122
135
135
135
135
160
160
160
160
175
175
180
215
C
40
40
40
50
40
40
30
30
30
30
30
26
45
40
40
40
30
30
32
32
30
30
30
30
32
32
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
30
32
45
D
77.5
77.5
77.5
70
70
70
86
86
86
86
86
70
70
70
70
70
86
86
100
100
86
86
86
100
100
100
86
86
86
86
86
100
100
100
100
100
86
861
86
86
150
150
150
150
APPROX. WEIGHT
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.
0.5
1
1
1
1
0.5
1
1
1
1
1
-
1
1
1.5
1.5
1.5
4.5
crompton-instruments.com
© 2018 TE Connectivity Ltd. family of companies. All Rights Reserved. EPP-3241-12/18
TE Connectivity, the TE connectivity (logo) and Crompton Instruments are trademarks of the TE Connectivity Ltd. family of
companies. Other logos, product and Company names mentioned herein may be trademarks of their respective owners. While TE has
made every reasonable effort to ensure the accuracy of the information in this brochure, TE does not guarantee that it is error-free,
nor does TE make any other representation, warranty or guarantee that the information is accurate, correct, reliable or current. TE
reserves the right to make any adjustments to the information contained herein at any time without notice. TE expressly disclaims all
implied warranties regarding the information contained herein, including, but not limited to, any implied warranties of merchantability
or fitness for a particular purpose. The dimensions in this brochure are for reference purposes only and are subject to change without
notice. Specifications are subject to change without notice. Consult TE for the latest dimensions and design specifications.
FOR MORE INFORMATION:
TE Technical Support Centres
USA:
UK:
Australia:
Singapore:
Hong Kong:
+1 800 327 6996
+44 1376 509 401
+61 1300 656 090
+65 6590 5151
+852 2790 9609
ENERGY
/// MR SERIES MEASURING RANGE
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