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BROADBAND UNTERMINATED CURRENT TRANSFORMER DATA

These transformers can provide an economical alternative to the broadband

 terminated transformers

where frequency response significantly above 2MHz is not required
Unterminated-current-transf

All models available with terminal or flying lead output, with and without

mounting feet.

A screened secondary winding may be specified
Broadband-Current-Transform

 

ID minimum mm

OD typical mm

W typical mm

H typical mm

Screened secondary

14

50

25

60

Unscreened secondary

17

47

23

55

 

TYPICAL VALUES

 

Model number

notes

Screen, leads, feet

Secondary resistor

Output

RECTANGULAR PULSE

SINEWAVE

DC saturation current

Max rms current

Peak current

Price

Droop

Ris e time

I-t

3dB bandwidt h

Ipeak/f

 

 

Ohm

V/A

%/ms

nS

mAS

lf Hz

hf MHz

A/Hz

Isat A

Irms A

Ipeak A

GBP

Notes

 

1

2

 

 

3

 

4

 

 

 

 

5

K2108

Y,N,Y

5

0.025

0.8

200

400

1.5

2

2.7

3

50

5000

84.00

20

0.1

2.2

200

140

5

2

0.8

50

0.25

5

200

60

10

2

0.4

K2125

N,Y,N

5

0.01

0.06

800

1600

0.1

0.5

10

0.35

200

10000

66.00

50

0.1

0.25

800

350

0.5

0.5

2.3

K2136

N,Y,N

5

0.01

2

800

1200

3

0.5

8

18

200

10000

68.00

50

0.1

10

800

250

15

0.5

1.5

Notes

1. Resistor should be non-inductive and selected to carry secondary rms and pulse currents.

2. The sensitivity is determined from the relationship Output = Secondary resistor/ratio. The ratio may be deduced from the resistor values and sensitivities in the data table. Current ratio accuracy +/-0.5% at log mid frequency point. +/-2% within one decade of 3dB cut-off points

3. I-t capability may be improved up to 80% by applying a dc offset current equal to Isat. See “Characteristics” section

4. High frequency properties achieved when secondary resistor is connected to a 50R cable via a resistor designed to make the source resistor equal to 50R. A 50R terminating resistor is employed at the receiver.

5. Small quantity price

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Other Models:

The table describes a small selection from the possible designs of unterminated broadband current transformers. 

The range can be extended to cover: ID 5mm to 100mm; sensitivity to 5V/A; droop to <0.01%/ms; I-t to >20,000mA s; lf cut-off to <0.01Hz and hf cut-off to 5MHz.

 Contact Lilco Ltd or complete the enquiry form for further information on this range.

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