Products

Environment-Friendly Nitrogen Insulated Rmu

China Environment-Friendly Nitrogen Insulated Rmu, Find details about China Ring Main Unit, Rmu from Environment-Friendly Nitrogen Insulated Rmu

Application Range
High-rise Buildings
Shell Material
Stainless Steel
Shell Protection Grade
IP42 or Cutomized
Brand
Sanhe
Transport Package
Plywood or Solid Wood
HS Code
8536200000
Application Range
High-rise Buildings
Shell Material
Stainless Steel
Shell Protection Grade
IP42 or Cutomized
Brand
Sanhe
Transport Package
Plywood or Solid Wood
HS Code
8536200000
   The environmentally-friendly Nitrogen fully insulated ring mains cabinet is the latest generation of truly environmentally friendly gas-filled fully insulated, fully enclosed, shared box and expandable maintenance-free power distribution switches independently developed by Sanhe Power Tech (Shenzhen)Co., Ltd. equipment. The ring main circuit uses nitrogen (N2), which accounts for 78% of the natural air composition, as the insulating medium, and the vacuum load switch or vacuum circuit breaker is used as the breaking unit. The main circuit of the switchgear adopts an optimized electrode shape to balance the electric field distribution of the main circuit. There is no need to use solid insulating materials such as epoxy resin, which can ensure that the product does not require any non-environmental gas recovery after the end of its service life, and minimizes the extra-nuclear cost burden caused by solid chemical insulation waste disposal. Therefore, it can be said that Sanhe's environmentally friendly nitrogen inflatable fully insulated ring main unit is currently the first newest and truly environmentally friendly inflatable cabinet in the domestic and even international markets. The environment-friendly nitrogen filled and fully insulated ring network cabinet vacuum load switch or vacuum circuit breaker adopts a self-developed high-performance spring operating mechanism, and can also be equipped with permanent magnet operating according to customer needs.The Ring Main Unit 8MRMU was developed under Germany technology by the engineers of over ten years switchgear production and application experience. We designed it on the concept of self-contained and totally insulated switchgear for secondary power distribution network. The products conform to China national GB and IEC standards.
      
    The Ring Main Unit 8MRMU is insensible to the environment and it is maintenance free. All the live parts are integrated well in the gas tank which SF6 is filled at 0.03 MPa gauge pressure(relative). These parts cover bus bar system, load break switch, disconnector, circuit breaker, earthing switch , fuse holders etc. The compact system,of which up to 6 loops could be accommodated in a single gas tank, is ideal solution for the installation site with a harsh climatic condition or environmental restrictions, We have gave models for the standard specification like 12kV and 24kV. Meanwhile,we can accept OEM or ODM business.

Feature:
  • 1. The main circuit of the switchgear in the gas box adopts optimized electrode shape to balance the electric field distribution of the main circuit, eliminating the need to use solid insulating materials such as epoxy resin, which can ensure that the product does not require any non-environmental gas recovery after the end of the service life, and minimizes solid chemicals. The extra-nuclear cost burden caused by insulation waste disposal.
  • 2 The product is developed based on the interface size of the SF6 gas-filled and fully insulated ring main unit standardized by the State Grid Corporation of China and IEC.
  • 3 .Introduction of 110 kV high voltage G IS design for the main circuit design in the product air box Concept and with the help of computer modern electric field analysis software, and the main circuit design is highly optimized, while achieving the compact design of the product The product has excellent electrical insulation performance, and the air box of the product is fully opened. It can meet the rated insulation level when it is open.
  • 4. Through the three-dimensional modeling of the main circuit of the product and detailed electric field simulation analysis, the product has no detectable partial discharge under the condition of 1.1 times of rated line voltage (i.e. 13.2kv), which fully meets the requirements of non PD switchgear.
  • 5. Through the three-dimensional modeling of the main circuit and detailed simulation analysis of the current carrying capacity and heat dissipation channel of the main circuit, the product fully meets the temperature rise requirement of 1.1 times of the rated current.
  • 6 The main circuit design in the air tank of the product introduces the 110 kV high-voltage G IS design concept and uses computer modern electric field analysis software to highly optimize the main circuit design to achieve a compact design of the product while ensuring that the product has excellent electrical insulation performance. The product air box is fully open It can meet the rated insulation level when it is open.
  • 7 , The mechanical life of the circuit breaker can reach 20000 times, and the mechanical life of the three-position isolating switch 5 000 times, reliable and stable action, fast braking. Triplex with four-link output Position mechanism to avoid overshoot of the isolation knife and excessive shaking of the moving contact.
  • 8 , Vacuum circuit breaker or vacuum load switch and S F6 gas-filled fully insulated ring main unit circuit breaker The mechanism is universal, the circuit breaker operating mechanism and the three-station mechanism use the same motor, so It is convenient for production management and maintenance at the operation site. There is a certain interlock between institutions The device ensures reliable operation of the operating mechanism and effectively avoids misoperation.
  • 9 , The product has a complete five-prevention chain function, which fully meets the operation of the State Grid Corporation And operational safety performance requirements.

  • 10 , The product technical plan is complete, which can be implemented according to the technical requirements of various places and even countries Current upper isolation or lower isolation, top expansion or side expansion, co-box type or expandable type, spring actuator Structure or permanent magnet operating mechanism.

  • 11 , The main circuit adopts optimized electrode design, and the high-potential conductors in the gas box are completely bare conductors between phases and fractures. There is no need to block the discharge insulating partitions. The hidden danger of insulation aging failure.
Specification 
 

Load switch cabinet

Breaker

Cabinet

Rated voltage  kV

12

95

Rated frequency Hz

50/60

1 min power frequency withstand voltage (phase to phase, to ground) kV

42

1 min power frequency withstand voltage (fracture) kV

48

Lightning impulse withstand voltage kV

75

Rated current A

630

630/1250(*)

Rated active load breaking current A

630

 

Rated closed loop breaking current A

630

 

Rated cable charging breaking current A

10

25

Ground fault breaking current A

31.5

 

Cable charging breaking current A during ground fault

17.3

 

Rated short-circuit breaking current

 

20

Rated short-circuit making current

50

Rated short-time withstand current (4s)

20

Rated peak withstand current

50

Mechanical life

20000

3-position isolator Mechanical life

10000

Ambient temperature (Celsius)                 

-40---+40

SF6 gas pressure (gauge pressure at 20 ºC ) MPa

0.02

Arc withstand capability kA/1s

20

Protection level

Tank IP67/cabinet IP4X

Note:*  The rated current value of circuit breaker unit and bus can be up to 1250A, which can be negotiated with the manufacturer according to the customer's demand.

Testing Area
Temperature rise test and partial discharging test



Environment-Friendly Nitrogen Insulated Rmu
 

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