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
Company Profile
Founded in 2002, Sanhe Power Tech is a national high-tech enterprise that specializes in power quality products, R&D of technology and solutions, production,service etc. It becomes industry-leading company.
The company has got multiple technologies including.
28 invention patents,
24 software copyrights,
22 national standards and 15 industry standards drafting.
Sanhe Power Tech is a member of international committees such as
the International Electrotechnical Commission (IEC)
the Institute of Electrical and Electronics Engineers (IEEE) etc.
The software development system has passed the CMMI evaluation of the American SEI.
There are three main business covering:
A full range of power quality testing and governance products and complete solutions.
Distributed new energy system products and advanced solutions.
Primary and secondary engineering based on "dual carbon" and energy management with standardized and professional engineering services.
Our Advantages
Simulation of GRID Reactive Load Flow
Analysis of L-C Circuit Amplitude-frequency Characteristic
Integration & Relay Coordination Reaction
Characteristic Curve of Permanent Magnet Breaker
Sampling & Filtering of Electronic Circuit
IGBT Driving & Protection
PWM Technology
Technology about Semiconductor Forced Commutation
Thermal Simulation & Heat Exchange Design
Feed-forward Second-order Complex Vector Algorithm
3D & Data Simulation
Instrumented IOT Communication
VP Scheduling & Dispatcher
Digital Twins of Micro-Grid & Islanding-Grid
FAQ
What kind of payment terms can we accept?
Payment in advance,Installment payments,Letter of credit(L/C).
What is the lead time of products?
According to different products, the lead time is different.
For standard products like APF,SVG, the lead time is one week.
For customized capacitor bank etc, the lead time is 25 to 45 days.
How to find the product model if you are some demand?
If you need our technical guide,please advise your problem details as much as you can,we can give more reasonable solution.
You may provide following drawings or report
Single line drawing
Panel primary scheme drawing
Power quality test report(mainly about harmonics)
How to find the product model if you have details electrical drawings?
Please advise Load name plate, load working condition, existing power factor, target power factor, harmonic times etc Or Rated voltage,compensation capacity, harmonic times(reactor detuning factor), other components etc.
How to find the product model if you can not provide enough information?
We can supply your products according to your technical requirement.
We can go to your project site and give a professional test report after test.
Why do we choose Sanhe power quality solution?
Sanhe has specialized in over 20 years experience in power quality products and solution. We have met most of power quality problems and gave the solutions.
What kind of technical service does Sanhe provide?
• Project-site power quality test ( or test report from customer)
• Improvement solution and budget
• Product solution and price
• Products supply
• Product commissioning
What kinds of standards does Sanhe product conform to?
Except China standards, Sanhe products also conform to IEC standards including
IEC61921 :2003 IEC61000-4-5:2005
IEC60529:2001 IEC60931-1: 1996
IEC60439-1 :2005 IEC60664-1 2007
IEC60831-1: 1996 IEC61000-4-3/2/4/5/18 IEC61000-2-4
IEC60255 IEC62208 2011…
IEC255-22-1
What is the compensation effect after using Sanhe products?
• Harmonic filtering meets standard
• Power factor is over 0.95,electrical bill saving,low reactive power penalty killing
• Reducing the loss of transformer and line
improve the distribution ability,
prolong the lifespan of electrical equipment
How long is the product guarantee time?
Usually,the guarantee time is one year. However,we can accept over 5 years too. Please contact our sales to get details information.
How to become the distributor or agent of Sanhe brand products?
Sanhe is looking for overseas distributor and agent. If you are interested in it, please feel free to contact us.
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