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UK Design and manufacture of wideband current measurement transformers and wideband voltage measurement transformers

BROADBAND UNTERMINATED PCB CURRENT TRANSFORMER DATA

Suitable for low current, high frequency applications where pcb mounting, good high frequency response and economy are prime considerations.

ToroidCase

PCB Mounted current transformer

Toroid-Mount

In model K2119 pins 1 and 5, and pins 2 and 6 are connections to two isolated primary windings. Pins 3 and 7 are connected to the secondary winding. When pins 1 and 2 are positive, pin 3 is positive. In normal use pin 1 is connected to pin 2 and pin 5 is connected to pin 6.

TYPICAL VALUES

Model number

notes

Secondary resistor

Output

RECTANGULAR PULSE

SINEWAVE

DC saturation current

Max rms current

Peak current

Price

Droop

Rise time

I-t

3db bandwidth

ipeak/f

 

Ohm

V/A

%/ms

ns

mA s

lf Hz

hf MHz

mA/Hz

Isat A

Irms A

Ipeak A

GBP

Notes

1

2

 

 

3

 

4

 

 

 

 

5

K2119

5

0.2

75

40

0.0005

140

10

3

0.45

5

100

19.50

50

2.0

700

30

60E-6

1300

15

0.35

K2137

10

0.1

9

40

0.004

20

10

25

0.45

5

100

23.00

50

0.5

45

35

0.0009

80

12

6

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 value / ratio. The ratio may be deduced from the resistor values and sensitivities in the data talbe. Current ratio accuracy within +1% / -3% within one decade of the 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. It may be necessary to screen the transformer in some applications.

 

5. Small quantity price.

Updated    September 2016

Other Models:

 

This range represents a small selection from the possible designs of unterminated broadband pcb current transformers.

 

The range can be extended. Contact Lilco Ltd or complete the enquiry form for further information on our custom range of pcb mounted current transformers