DAQO GROUP



DQS-12/24 Series
SF6 Gas Insulated Ring Main Unit

DQS-12/24 SF6 Gas Insulated Ring Main Unit adopt advanced design concept and manufactured by advance...

SF6 Gas Insulated Ring Main Unit

DQS-12/24 SF6 Gas Insulated Ring MainUnit adopt advanced design concept and manufactured by advanced processingtechnology and production equipment. With the features of small volume, lowcost, easy operation and high reliability it is suitable for electric system,industrial enterprises, high-rise buildings, cubic type substations and outdoorRMUs. 

Features
1 All high voltage live parts are sealed in low pressure SF6 gas.

2 Adopt modular design. Differentmodule combinations realize different main wiring and combination pattern canbe changed according to the requirements. 3 Simple but efficient interlock can prevent maloperation.
4 Adopting interface insulation structure to realize plate grafting of highvoltage parts and extension of cabinet.

5Adopting deep penetration laser welding and Helium leak detection process toensure gas tank tightness.

6Adopting robot stud welding process to ensure the welding precision

7Reliable operating mechanism and long life span.


Item

Unit

Load switch(C)

Switch-fuse combinationF

Vacuum circuit breakerV

Rated voltage

kV

12/24

12/24

12/24

Rated current

A

630

125*

630

Rated power-frequency withstand voltage(1min)

kV

12kV:42/48kV; 24kV:50/60kV

Rated lightning impulse withstand voltage

kV

12kV:75/85kV;24kV:125/145

Rated frequency

Hz

50

Rated active load breaking current

A

630

 

 

Rated short-circuit breaking current

kA

 

31.5*

20

Rated short-circuit making current

kA

50

80*

50

Transfer current

A

 

12kV:1750A

24kV:1400A

 

Rated short-time withstand current (4s)

kA

20

 

20

Rated peak withstand current

kA

50

 

50

Gas leakage rate

 

<0.01%

Protection degree:

Gas tank/cabinet

 

IP67/IP4X


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