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STA3340 Series Box-type Three-phase Current Transformers for Protection
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STA3340 Series Box-type Three-phase Current Transformers for Protection
Features:
① Flexible in installation modes: can be fixed on either the primary wire or the bottom board.
② Three round through holes for primary wires in a '品' configuration.
③ Output terminal is a standard socket with a plug, making it easy to use.
④ Box structure, encapsulated by a plastic shell, has a sleek design.
STA3340 General Technical Specifications for Standard Products:

1Features: 

Flexible in installation modes: can be fixed on either the primary wire or the bottom board.

Three round through holes for primary wires in a '' configuration.

 Output terminal is a standard socket with a plug, making it easy to use.

 Box structure, encapsulated by a plastic shell, has a sleek design.

 

2Ambient Conditions:

① Ambient temperature: -55℃+55℃;

② Relative humidity: ≤90% at 40℃;

③ Atmospheric pressure: 8601060mbar(about 650800mmHg);

 

3Operating Frequency Range: 20Hz~1kHz

 

4Insulation Rating: Class A (80℃)

 

5Safety Features:

① Insulation resistance: >1000MΩ in normal condition;

② Insulation withstand voltages: 6KV 50Hz/1min.

③ Fire retardancy: In conformity with UL94-V0.



6Outline Drawing, Installation Dimension and Coil Diagram: ( tolerance±0.5mm )

 

①Outline Drawing, Installation Dimension

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● Remark: Provide with a plug along with each product. As to installation instruction, please see the following page.



 Coil Diagram


image.png

  

③ Installation instruction:

Take four support legs (included in package along with the product), insert them into the sockets as shown in the right figure. The center distance between the mounting holes is 50.0×71.0; The diameter of the mounting hole for the support leg is Φ 5.0, and then use M4 screw to fix the current transformer on the bottom board.


7Typical Application and Parameters:

The parameters in the application as shown in the figure are listed in table below:

  image.png

Model

Rated Input Current

Rated Output Current

Rated Sampling Resistance

Rated

Sampling Voltage

Phase Shift

Non- Linearity

Linear Range

Withstand Voltage

STA3340-01

3Φ-10A

3Φ-1mA

3Φ-200Ω/Y0

3Φ-200mV/phase

≤60’

≤1%

12.5 times of rated value

≥4KV

STA3340-02

3Φ-25A

3Φ-1mA

STA3340-03

3Φ-50A

3Φ-1mA

STA3340-04

3Φ-100A

3Φ-1mA


Application Case
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