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Mini Current Transformer

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Product description
Parameters

Mini Current Transformer
Generally used in measuring instruments, as the secondary transformer of the instrument, convert 1 A, 5 A into mA current, For instrument use;

 

Specifications
Current range:5 - 200 A;
Secondary signal:2 m A- 200 m A;
Withstand voltage rating:2 / 3 KV;
Rated frequency:50 / 60 HZ;
Flame retardant properties:UL 94 - V 0;
Use environment:- 25℃-50℃。

Type A: Dual pins, usually smaller in size and smaller in current range, usually using ultra-fine crystal cores with higher precision;  Type B: Four-pin parallel pins, usually the current is from large to small, usually using ultra-microcrystalline iron core, so the accuracy is higher;  Type C: Front and rear parallel pins, usually the current is from large to small, usually using ultra-microcrystalline iron core, so the accuracy is higher;  Class D: Three-pin, usually use silicon steel wound core, so the accuracy is not as good as the ultra-microcrystalline core, but the load capacity is strong.Type A: Dual pins, usually smaller in size and smaller in current range, usually using ultra-fine crystal cores with higher precision;

Type A: Dual pins, usually smaller in size and smaller in current range, usually using ultra-fine crystal cores with higher precision;  Type B: Four-pin parallel pins, usually the current is from large to small, usually using ultra-microcrystalline iron core, so the accuracy is higher;  Type C: Front and rear parallel pins, usually the current is from large to small, usually using ultra-microcrystalline iron core, so the accuracy is higher;  Class D: Three-pin, usually use silicon steel wound core, so the accuracy is not as good as the ultra-microcrystalline core, but the load capacity is strong.Type B: Four-pin parallel pins, usually the current is from large to small, usually using ultra-microcrystalline iron core, so the accuracy is higher;

Type A: Dual pins, usually smaller in size and smaller in current range, usually using ultra-fine crystal cores with higher precision;  Type B: Four-pin parallel pins, usually the current is from large to small, usually using ultra-microcrystalline iron core, so the accuracy is higher;  Type C: Front and rear parallel pins, usually the current is from large to small, usually using ultra-microcrystalline iron core, so the accuracy is higher;  Class D: Three-pin, usually use silicon steel wound core, so the accuracy is not as good as the ultra-microcrystalline core, but the load capacity is strong.Type C: Front and rear parallel pins, usually the current is from large to small, usually using ultra-microcrystalline iron core, so the accuracy is higher;

Type A: Dual pins, usually smaller in size and smaller in current range, usually using ultra-fine crystal cores with higher precision;  Type B: Four-pin parallel pins, usually the current is from large to small, usually using ultra-microcrystalline iron core, so the accuracy is higher;  Type C: Front and rear parallel pins, usually the current is from large to small, usually using ultra-microcrystalline iron core, so the accuracy is higher;  Class D: Three-pin, usually use silicon steel wound core, so the accuracy is not as good as the ultra-microcrystalline core, but the load capacity is strong.Class D: Three-pin, usually use silicon steel wound core, so the accuracy is not as good as the ultra-microcrystalline core, but the load capacity is strong.​​​​​​

Category

Model

Rated input

Recommended turns ratio

load

Accuracy

size

(Maximum input)

A

B

C

D

Z

P

A

T

Q

mm

mm

mm

mm

mm

mm

A

WCT4.5

5(20)

1000

10

0.2

19.2

20

11

4.5

12

 

A

WCT5

5(20)

1000

10

0.2

19

18

10.5

5

12

 

B

WCT5.6

5(20)

1000

10

0.2

19

20

11

5.6

6.4

15.2

B

WCT7

5(40)

2500

20

0.1

23.7

24.5

11

7

15\19

10

B

WCT8.9

20(80)

2500

50

0.1

26.4

28.2

17

8.9

15\19

16

C

WCT7.5

10(60)

2500

20

0.1

23.5

24.5

11.2

7.5

18

8

C

WCT13.2

30 (90)

2500

50

0.1

37.7

28.5

14

13.2

24.7/33

13

D

WCT9.5

20 (60)

1000

100

1.0

23.8

23.8

11.1

9.5

15.24

7.62

D

WCT11.4

30(90)

1000

100

1.0

30.2

30.3

14.3

11.4

20.32

10.16

D

WCT14.6

S30(150)

1000

100

1.0

38.1

38.1

15.9

14.6

33

10.16

D

WCT19.05

100(150)

1000

100

1.0

44.5

44.5

14.3

19.05

35.56

10.16

D

WCT23.8

8150(200)

1000

100

1.0

55.6

55.6

20.6

23.8

45.72

12.7

img

case1:

The typical application circuit is shown as in Fig. 1. The secondary load is basically zero. The precision transformer should be a zero-load transformer. Through the operational amplifier, the user can adjust the value of the feedback resistor R to obtain the required voltage output at the output. The capacitor C and resistor r are used to compensate the phase difference. If the user uses software compensation or does not need to compensate the phase difference, the capacitor C and resistor r can be left unconnected. The operational amplifier in the figure is a general operational amplifier; the accuracy of the feedback resistor R in Figure 1 is related to the accuracy requirements of the output voltage; D 1, D 2 diodes are used for 1 N 4148 protection, and can be left out; C 0 is an anti-interference capacitor The capacitance is determined according to the circuit and operational amplifier technical parameters, otherwise it will cause the output signal to oscillate

 

img

Case2:

The typical application circuit is shown as in Fig. 2. And the resistance R can get the output voltage directly. V 0 = R* I 0; R is recommended to use the recommended value, too high will easily saturate. C in Figure 2 can play a role in phase compensation, no phase requirement can be ignore。

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