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Bergoz Current Transformers, CT  
Tabs
 
 Mechanical Specifications / Other
  Aperture B  C D E F
  Inside Diameter (mm) 7.0 13.0 26.0 37.0 53.0
  Outside Diameter (mm) 25.0 x 31.0 48.0 62.0 73.0 92.0
  Thickness (mm) 15.0 17.0
  Connector Type SMA (-S) or BNC (-B)
  Connector Height (mm)
    SMA
    BNC
10mm
16mm
  Operating Temperature -20 to +120 °C
  Case Isolation 1 None; The case shield is continuous with the connector shield
  Organic Materials Epoxy and polyurethane paint, polyethylene and PTFE connector insulation. Epoxy and polyurethane potting. Polyester tape and label.
Note 1: For personnel and equipment safety and measurement accuracy, current measurements on conductors at high voltage should be made only with a conducting shield cylinder placed inside the CT aperture. There should be a low electrical impedance connection from one end only to a reliable local ground. An inner insulating cylinder of adequate voltage isolation should be between the shield cylinder and the conductor at high voltage. Any leakage, induced or breakdown current between the high voltage conductor and the ground shield will substantially pass to local ground rather than through the signal cable to signal ground. (Do not create a "current loop" by connecting the shield cylinder to ground from both ends. Current flowing in this loop will also be measured by the CT.)
 
 Electrical Specifications
  Model Output (V/A) Max rms
(A)		 Max peak
(A)		 Droop
(%/µs)		 Rise
(ns)		 Max I.t*
(As) in 50Ω		 -3db low
(Hz)		 -3db High
(MHz)
in 1MΩ in 50Ω
  CT-B5.0
  CT-B2.5
  CT-B1.0
  CT-B0.5
  CT-B0.25
  CT-B0.1
  CT-B0.05 		5.0
2.5
1.0
0.5
0.25
0.1
0.05		 2.5
1.25
0.5
0.25
0.125
0.05
0.025		 2
5
8
11
16
25
35		 200
400
1000
2000
4000
10000
20000		 3
0.75
0.13
0.03
0.015
0.006
0.003		 0.875
0.7
0.7
1.75
3.5
7
17.5		 0.0001
0.0004
0.0025
0.01
0.04
0.25
1		 4800
1200
200
48
24
10
5		 400
500
500
200
100
50
20
  CT-C5.0
  CT-C2.5
  CT-C1.0
  CT-C0.5
  CT-C0.25
  CT-C0.1
  CT-C0.05 		5.0
2.5
1.0
0.5
0.25
0.1
0.05		 2.5
1.25
0.5
0.25
0.125
0.05
0.025		 2
5
11
16
22
35
50		 200
400
1000
2000
4000
10000
20000		 3
0.75
0.13
0.03
0.01
0.004
0.002		 0.875
0.7
0.7
1.75
3.5
7
17.5		 0.0002
0.0008
0.005
0.02
0.08
0.5
2		 4800
1200
200
48
12
6
3		 400
500
500
200
100
50
20
  CT-D5.0
  CT-D2.5
  CT-D1.0
  CT-D0.5
  CT-D0.25
  CT-D0.1
  CT-D0.05 		5.0
2.5
1.0
0.5
0.25
0.1
0.05		 2.5
1.25
0.5
0.25
0.125
0.05
0.025		 2
5
11
16
22
35
50		 200
400
1000
2000
4000
10000
20000		 3
0.75
0.13
0.03
0.01
0.002
0.001		 0.875
0.7
0.7
1.75
3.5
7
17.5		 0.0002
0.0008
0.005
0.02
0.08
0.5
2		 4800
1200
200
48
12
2
1		 400
500
500
200
100
50
20
  CT-E5.0
  CT-E2.5
  CT-E1.0
  CT-E0.5
  CT-E0.25
  CT-E0.1
  CT-E0.05 		5.0
2.5
1.0
0.5
0.25
0.1
0.05		 2.5
1.25
0.5
0.25
0.125
0.05
0.025		 2
5
11
22
32
50
71		 200
400
1000
2000
4000
10000
20000		 3
0.75
0.13
0.03
0.01
0.002
0.001		 0.875
0.7
0.7
1.75
3.5
7
17.5		 0.0002
0.0008
0.005
0.02
0.08
0.5
2		 4800
1200
200
48
12
2
1		 400
500
500
200
100
50
20
  CT-F5.0
  CT-F2.5
  CT-F1.0
  CT-F0.5
  CT-F0.25
  CT-F0.1
  CT-F0.05 		5.0
2.5
1.0
0.5
0.25
0.1
0.05		 2.5
1.25
0.5
0.25
0.125
0.05
0.025		 2
5
11
22
32
50
71		 200
400
1000
2000
4000
10000
20000		 3
0.75
0.13
0.03
0.01
0.002
0.001		 0.875
0.7
0.7
1.75
3.5
7
17.5		 0.0002
0.0008
0.005
0.02
0.08
0.5
2		 4800
1200
200
48
12
2
1		 400
500
500
200
100
50
20

 * Max I.t product for bipolar pulses into a 50 ohm termination. When unipolar pulses are measured
 the CT output winding may require a few mA of dc current bias to achieve the maximum I.t product.
 Mechanical Drawings

CT Current Transformer Model Numbers

 

  Aperture Range:

 Specifications are subject to change without notice.

 Last updated on: 10 August, 2007
 
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