mg龙之谕II,ZRH-C30 Micro Precision Current Transformers

a. Main Features: (1)、Small in size, light weight, easy to install with high density (2)、Secondary output current, strong antijamming capability (3)、With ex
  • 产品详情/PRODUCT DETAILS
a. Main Features: 
(1)、Small in size, light weight, easy to install with high density
(2)、Secondary output current, strong antijamming capability
(3)、With excellent linearity, wide working range, perfect consistency
b. Electrical Parameters:
(1)、Rated input current: 0~10A
(2)、Rated output current: 0~10mA
(3)、Non-linearity:  Ratio error <±0.1%;   Phase error <±5′
(4)、Range of linearity:10%~2000% (or more)rated current
(5)、Frequency characteristic: 45~800HZ
(6)、Limitation of power consumption: 0.5VA
(7)、Insulation resistance: 500MΩ @500VdC
(8)、Operating temperature: -40℃~+85℃
(9)、Power frequency withstands voltage: 3kV 2mA 1min
(10)、Output load resistance:≤400Ω
(11)、Structure:Epoxy encapsulating
(12)、Outer casing:PBT heat-resistant material or ABS flame-retardant material 
(13)、Terminal:input and output→pins

mg龙之谕II c. Type Implication: ZR   H    C   XX
 ZR  -----Zhongrui Electrical Technical Co., Ltd
 H   -----Product’s variety code(H、Ultra-miniature transformer)
 C   -----Classification code( C、Current 
 XX  -----Product’s outer casing code

mg龙之谕II

mg龙之谕IID. Method of Application: "" />

mg龙之谕IIZRH-CXX Series Current Transformer

mg龙之谕IITypical application circuit (as the figure shows)

mg龙之谕II 

mg龙之谕II 

mg龙之谕II

mg龙之谕IIThread a turn bus in the performed hole and input the rated current (e.g. xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />5A), then the secondary side (vice side) will sense a small current of milliamperes (e.g. 2.5mA). Adjust the feedback resistance, though the function of operational amplifier, then you can get the needed voltage at the output terminal.

mg龙之谕IIPractical example

Feedback resistance  R=5V/2.5mA/=2.0KΩ

If you want the output voltage to be perfectly accurate, you can choose 1.8KΩ as your resistance, in addition, you can cascade an adjustable resistance300Ω)for fine tuningOr choose 2.2 KΩ as your resistance, cascading an adjustable resistance (50KΩ) for fine tuningso that you can get your required accuracy.

Generally, Capacitance’s empirical value will be 0.01-0.033µF. Resistance will be 200-300KΩ adjustable resistance. IC will be OP07 or µA741 or other universally operational amplifier.

Particular illustration

Set the resistance in parallel at the secondary side of the transformer to get the required voltage. The resistance should not be too large, generally it is no more than 400Ω. If the resistance is too large, linearity of the transformer will be not so good that phase shift will increase.

 

e. Technical parameters of commonly used product specifications

Specifications

Rated

input current

(A)

Rated

output current

(A)

(±%)

Ratio error after the compensation

(±%)

Phase error

after the compensation

1A/2.5mA

1

2.5

0.1

5

1A/5mA

1

5

0.1

5

5A/0.35mA

5

0.35

0.1

5

5A/1.85mA

5

1.85

0.1

5

5A/2.5mA

5

2.5

0.1

5

5A/5mA

5

5

0.1

5

5A/10mA

5

10

0.1

5

Note: The above specifications are stock products’ specifications. We can also design for customers according to their requirements.

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