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Description and Functions of Centralized Type DTU


  • With "communication", it has "remote maintenance" function.

  • Flexible configuration, all protection functions have separate retreat.

  • The device has a complete self-checking function to detect the working conditions of each part online.

  • The closing and closing circuit adopts anti-misoperation design and has anti-missing function.

  • Applicable to analog acquisition, state quantity acquisition, local and remote control switch closing of 4-12 switch

  • 24 channels can be controlled by expansion

  • By selecting different configurations, it can meet the needs of “Three Remote” and “Two Remote” of State Grid and South Grid.

  • Meet the special requirements of all parts of the country (such as Shandong, Beijing, Guangdong, etc.)

  • Zero-sequence current setting adaptive function, no manual setting required

  • Meet the specific requirements of “one or two integration”

  • The core unit can be flexibly configured to shade vertical, shaded horizontal, outdoor vertical and group screen.


Technical Parameters of Centralized Type DTU


Ac sampling

Electromagnetic transformer

Measuring voltage range

0~200V(Un=100V)

ratio (10KV/)/(0.1KV/)

Measuring zero-sequence voltage range

0~200V(Un=100V/3)

ratio (10KV/)/(0.1KV/)

Measuring current range

0.01~1.2A(In=1A)或0.01~6A(In=5A)

Precision grade of measuring voltage and current

Class 0.5

Protective current range

0~100A( In=5A)/0~20A( In=1A)

Protective current accuracy

±3%

Active power precision class

Class 0.5

Reactive power accuracy class

Class 1

Power factor resolution

0.001

Frequency measurement range

45~55Hz

Frequency measurement error

<0.01Hz

Electronic transformer

Measuring voltage range

0~6.5V(Un=3.25V/V)

ratio (10KV/)/(3.25V/)

Measuring zero-sequence voltage range

0~13V(Un=6.5V/3V)

ratio (10KV/)/(6.5V/3V)

Measuring current range

0~20V(In=1V)        ratio 600A/1V

Measuring zero sequence current range

0~2V(In=0.2V)        ratio 20A/0.2V

Precision class of measuring voltage and current

Class 0.5

Protective current range

0~20V(In=1V)        ratio 600A/1V

Protective current accuracy

±3%

Zero sequence voltage / zero sequence current accuracy level

Class 0.5

Active power precision class

Class 0.5

Reactive power accuracy class

Class 1

Power factor resolution

0.001

Frequency measurement range

45~55Hz

Frequency measurement error

<0.01Hz





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