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. 5 Adopting deep penetration laser welding and Helium leak detection process toensure gas tank tightness. 6 Adopting robot stud welding process to ensure the welding precision 7 Reliable operating mechanism and long life span.

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General specification

DQS-12/24 Series SF6 Gas Insulated Ring Main Unit — General specification (14 items)
Item Load switch(C) Unit
Rated voltage 12/24 kV
Rated current 630 A
Rated power-frequency withstand voltage(1min) 12kV:42/48kV; 24kV:50/60kV kV
Rated lightning impulse withstand voltage 12kV:75/85kV;24kV:125/145 kV
Rated frequency 50 Hz
Rated active load breaking current 630 A
Rated short-circuit breaking current On request kA
Rated short-circuit making current 50 kA
Transfer current On request A
Rated short-time withstand current (4s) 20 kA
Rated peak withstand current 50 kA
Gas leakage rate < 0.01%
Protection degree: Gas tank/cabinet IP67/IP4X

Specifications are reproduced from the manufacturer's published data for this model; final configuration is confirmed on the quotation.

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