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二次互感器 微型电流互感器

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产品描述
参数
使用综述
* 使用场合:一般使用于计量仪表内,做为仪表的二次互感器,由A转换成mA电流,供仪表使用;
* 产品特点:尺寸小,准确级高。
 
技术参数
* 电流范围: 5-200A;
* 二次信号: 2mA-200mA
* 耐压等级: 2/3KV;
* 额定频率: 50/60HZ;
* 阻燃特性: UL94-V0;
* 使用环境: -25℃至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.
A类:双针脚,通常尺寸较小,电流范围也小,通常使用超微晶铁心,精度较高;
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.
B类:四针平行针脚,通常电流从大到小,通常使用超微晶铁心,故精度较高;
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.
C类:前后平行针脚,通常电流从大到小,通常使用超微晶铁心,故精度较高;
 
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.
D类:三针脚,通常使用硅钢卷绕铁心,故精度没超微晶铁心好,但带载能力强。
 
尺寸性能

类别

产品规格

额定输入

建议匝比

负载

准确度

尺寸

(最大输入)

A

B

C

D

Z

P

A

T

Q

mm

mm

mm

mm

mm

mm

A

wctΦ4.5

5(20)

1000

10

0.2

19.2

20

11

4.5

12

 

A

WCTΦ5

5(20)

1000

10

0.2

19

18

10.5

5

12

 

B

WCTΦ5.6

5(20)

1000

10

0.2

19

20

11

5.6

6.4

15.2

B

WCTΦ7

5(40)

2500

20

0.1

23.7

24.5

11

7

15\19

10

B

WCTΦ8.9

20(80)

2500

50

0.1

26.4

28.2

17

8.9

15\19

16

C

WCTΦ7.5

10(60)

2500

20

0.1

23.5

24.5

11.2

7.5

18

8

C

WCTΦ13.2

30 (90)

2500

50

0.1

37.7

28.5

14

13.2

24.7/33

13

D

WCTΦ9.5

20 (60)

1000

100

1.0

23.8

23.8

11.1

9.5

15.24

7.62

D

WCTΦ11.4

30(90)

1000

100

1.0

30.2

30.3

14.3

11.4

20.32

10.16

D

WCTΦ14.6

S30(150)

1000

100

1.0

38.1

38.1

15.9

14.6

33

10.16

D

WCTΦ19

100(150)

1000

100

1.0

44.5

44.5

14.3

19.05

35.56

10.16

D

WCTΦ23.

8150(200)

1000

100

1.0

55.6

55.6

20.6

23.8

45.72

12.7

 

典型应用

img

使用方法一:
典型应用电路如图1所示。二次负载基本为0。互感器应选用0负载互感器。通过运算放大器,用户可以调节反馈电阻R值在输出端得到所要求的电压输出。而电容C及电阻r是用来补偿相位差的。如用户使用软件补偿或不需要补偿相位差的场合,电容C及电阻r可以不接。图中运算放大器为通用运算放大器;图1中反馈电阻R的精度与输出电压的精度要求有关;D1、D2二极管为1N4148起保护用,可以不接;C0为抗干扰电容,电容根据的电路及运放技术参数来定,否则会引起输出信号振荡。
 
img
使用方法二:
典型应用电路如图2所示。并电阻R直接可以得到输出电压。V0=R*I0;R建议使用推荐值,太高容易饱和。图2中C可以起到一定的相位补偿作用,无相位要求可以不加 。
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