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CT100

Key Features:

Cat.
Number
Current Ratio
Pri. / Sec.
Accuracy
%
Burden
VA
Dimensions
Mtg. Slots
Ship Wt.
Lb.
A
B
C
D
E
F
G
H
CT50A
50:5
3.2
2
3.75
1.75
3.25
3.00
0.87
2.87
.22
.37
1.3
CT60A
60:5
2.4
2
3.75
1.75
3.25
3.00
0.87
2.87
.22
.37
1.4
CT75A
75:5
2.0
2
3.75
1.75
3.25
3.00
0.87
2.87
.22
.37
1.5
CT100A
100:5
2.0
2
3.75
1.75
3.25
3.00
1.20
2.87
.22
.37
1.1
CT150A
150:5
1.2
2
3.75
1.75
3.25
3.00
1.20
2.87
.22
.37
1.4
CT200A
200:5
1.2
2
4.75
1.75
4.25
4.00
2.20
3.87
.22
.37
1.7
CT250A
250:5
0.6
2
4.75
1.75
4.25
4.00
2.20
3.87
.22
.37
1.7
1.2
5
CT300A
300:5
0.6
2
4.75
1.75
4.25
4.00
2.20
3.87
.22
.37
1.8
1.2
10
CT400A
400:5
0.6
2
4.75
1.75
4.25
4.00
2.20
3.87
.22
.37
1.8
1.2
10
CT500A
500:5
0.3
2
4.75
1.75
4.25
4.00
2.20
3.87
.22
.37
1.8
1.2
20
CT600A
600:5
0.3
2
6.00
1.75
5.25
5.25
3.50
5.12
.28
.37
2.5
1.2
20
CT800A
800:5
0.3
5
6.00
1.75
5.25
5.25
3.50
5.12
.28
.37
2.8
1.2
50
CT1000A
1000:5
0.3
5
7.00
1.75
6.25
6.25
4.50
6.12
.28
.37
3.3
1.2
50
CT1200A
1200:5
0.3
10
8.00
1.75
7.25
7.25
5.50
7.12
.28
.37
3.8
1.2
50

 

Application Data:

To obtain current measurement:

  1. Pass the wire carrying the current to be measured through the window of the CT transformer (acting as a primary winding).
  2. Connect the CT secondary to an ammeter with a 5 A movement.

 

For higher accuracy or higher VA burden rating:

  1. Choose a CT with a primary which is a multiple of the required primary rating and which has the accuracy or VA burden you require.
  2. Loop the wire carrying the current to be measured through the window a number of times equal to the multiple. This "winding" will reduce the ratio back to required primary rating.

 

Mechanical Data:




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