The Instrument Type Transformers EID-CT series. Current, Indoor, Toroidal current transformers


CT100

Key Features:

  • Toroidal design.

  • Supplied with 24" insulated secondary leads, terminated with crimped ring conneEID-CTors.

  • Suitable for use with bare (uninsulated) primary conduEID-CTor in circuits up to 600 V (4 KV Hi pot); or at higher voltages when a suitably insulated conduEID-CTor is used.

  • All units have 5 A secondary for use with standard AC ammeters with 5 A movements.

  • Two hole mounting bracket on all models.

p#

Current Ratio
Pri. / Sec.

Accuracy
%

Burden
VA

Dimensions

Mtg. Slots

Ship Wt.
Lb.

A

B

C

D

E

F

G

H

EID-CT50A

50:5

3.2

2

3.75

1.75

3.25

3.00

0.87

2.87

.22

.37

1.3

EID-CT60A

60:5

2.4

2

3.75

1.75

3.25

3.00

0.87

2.87

.22

.37

1.4

EID-CT75A

75:5

2.0

2

3.75

1.75

3.25

3.00

0.87

2.87

.22

.37

1.5

EID-CT100A

100:5

2.0

2

3.75

1.75

3.25

3.00

1.20

2.87

.22

.37

1.1

EID-CT150A

150:5

1.2

2

3.75

1.75

3.25

3.00

1.20

2.87

.22

.37

1.4

EID-CT200A

200:5

1.2

2

4.75

1.75

4.25

4.00

2.20

3.87

.22

.37

1.7

EID-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

EID-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

EID-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

EID-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

EID-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

EID-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

EID-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

EID-CT1200A

1200:5

0.3

10

8.00

1.75

7.25

7.25

5.50

7.12

.28

.37

3.8

1.2

5

 

Application Data:

To obtain current measurement:

  1. Pass the wire carrying the current to be measured through the window of the EID-CT transformer (a EID-CT ling as a primary winding).

  2. Connect the EID-CT secondary to an ammeter with a 5 A movement.

For higher accuracy or higher VA burden rating:

 

Choose a EID-CT with a primary which is a multiple of the required primary rating and which has the accuracy or VA burden you require.

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.

  • Example "A": To obtain an accuracy of 1.2% at 10VA burden with a ratio of 100:5, use a EID-CT400 and loop 4 primary turns through the window.

  • Example "B": To obtain a 25:5 ratio, use a EID-CT75 with 3 primary turns to yield 2% accuracy or a EID-CT50 with 2 primary turns to yield 3.2% accuracy.

Mechanical Data:

 

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