www.TriadMagnetics.com

T echnical Notes

1. Turns ratio: Primary to sense 1:500

2. Suggested burden resistor: 60 ohms.

3. Typical ouput: 110 mV / Amp.

Designed to monitor current in low frequency

applications. This Triad part may be used to

monitor current from .1 to 30 ampheres at

frequencies from 50 Hz to 400 Hz.

Current Sense Transformers

L o w F r equenc y

Triad current sense transformers are used to detect the current passing through

a conductor. These transformers are very reliable and operate effectively between

50-60 Hz. They are constructed of UL rated 130ºC materials.

4. Primary DCR: 250 μOhms maximum.

5. Sense DCR: 21 ohms maximum.

6. Constructed with UL recognized materials

(Class B, 130ºC).

7. Hi-pot: 2,500 volts wdg-wdg.

8. Potted version available with a

dielectric strength of 4,000 volts

wdg-wdg.

CSE187L P e r f ormanc e Gr aph

0.1

0.5

1

2

5

7

10

15

20

30

100%

90%

80%

70%

60%

Primary Current - AC Amps

400 Hz

60 Hz

50 Hz

T echnical Notes

1. Pin length: 5 ±1mm

2. Pin diameter: 0.8 ±0.1mm

3. Pin 3 normally for mechanical

support only

Class B

UL F ile: E205349

CST-1005

5

1000:1

100

0.0025

40.00

0.0958

0.4490

1.3694

1.8402

20.0

23.50

24.80

12.00

15.00

7.50

8.50

CST-1010

10

1000:1

100

0.0100

40.00

0.0969

0.4565

0.9686

1.1912

20.0

23.50

24.80

12.00

15.00

7.50

8.50

CST-1015

15

1000:1

100

0.0230

40.00

0.0971

0.4429

0.7508

0.9439

20.0

23.50

24.80

12.00

15.00

7.50

8.50

CST-1020

20

1000:1

100

0.0400

40.00

0.0977

0.3943

0.6174

0.7662

20.0

23.50

24.80

12.00

12.00

7.50

8.50

CST-1025

25

1000:1

100

0.0630

46.00

0.0976

0.4364

0.7496

0.9664

30.0

30.20

30.20

14.30

20.32

10.16

11.40

CST-1030

30

1000:1

100

0.0900

46.00

0.0977

0.4160

0.6710

0.8750

30.0

30.20

30.20

14.30

20.32

10.16

11.40

Ip

Amps

Part No.

Turns

Ratio

Ohms

Terminating

Resistor

Watt

DCR

(Ohms)

Nominal

Volts/Amp @ rated Lp for

various loads

100

500

2K

5K

Net

Weight

(grams)

REF

Case Dimensions – mm

ABC

D

E

F

Ip: Primary Current