Ring Main Unit (Sf6, solid insulation, environmentally friendly gas insulation)
Solid Insulated RMU
SSG-12 solid insulated ring network cabinet adopts fully insulated, fully enclosed standard European-style top expansion Busbar system, which is easy to install, low cost, self-diagnostic, maintenance-free, and low-temperature resistant.
SF6 Insulated RMU
SF6 insulated ring main unit at present, they are widely used in distribution systems with high power supply reliability requirements, such as urban commercial centers, industrial concentrated areas, airports, electrified railroads and high-speed highways.
Enviro Gas Insulated RMU
Environmentally friendly gas insulated ring main unit environmentally friendly, fully insulated, fully enclosed, economical price, easy to operate, upper isolation, lower isolation, maintenance-free customers do not need to commit again.
Seven Star Electric established in 1995. It is a national high-tech enterprise dedicated to the research, development and production of electric insulation products and high-voltage transmission and distribution products. The main products of the company include ring network cabinets, production and development of smart grid software and hardware (primary and secondary fused column switches, intelligent stations, power, clairvoyance, etc.), cable branch boxes, low-voltage complete sets of equipment, cable connectors, cold shrink cable accessories, insulators, lightning arresters, etc. The company has a registered capital of RMB 130 million, fixed assets of RMB 200 million and more than 600 employees. 2021, the company will achieve a turnover of 810 million yuan and tax revenue of nearly 30 million yuan. 2022, the annual output value is expected to exceed 1 billion yuan. The company's products have been sold to Vietnam, Philippines, Brazil, South Africa, Singapore, Malaysia and other countries. In 2022, Quanzhou Tian chi Electric Import & Export Trading Co., Ltd. Will be established to serve overseas customers.
Our fully insulated intelligent ring network cabinets cover SF6 gas insulated series, solid insulated series and environmental protection gas insulated series. After research and development, design and manufacture, we are fully equipped with the production capacity of standardized ring network cabinets and have obtained relevant third-party test reports.
At present, they are widely used in distribution systems with high power supply reliability requirements, such as urban commercial centers, industrial concentrated areas, airports, electrified railroads and high-speed highways.
Altitude
≤4000m (Please specify when the equipment operates at an altitude above 1000m so that the inflation pressure and the strength of the air chamber can be adjusted during manufacture).
Ambient temperature
Maximum temperature: +50°C;
Minimum temperature: -40°C;
The average temperature in 24h does not exceed 35℃.
Ambient Humidity
24h relative humidity not exceeding 95% on average;
The monthly relative humidity does not exceed 90% on average.
Application Environment
Suitable for highland, coastal, alpine and high filth areas; Seismic intensity: 9 degrees.
| No. | Standard No. | standard name |
|
1 |
GB/T 3906-2020 | 3.6 kV~40. 5kV AC metal-enclosed switchgear and control equipment |
|
2 |
GB/T 11022-2011 | Common technical requirements for high voltage switchgear and control gear standards |
|
3 |
GB/T 3804-2017 | 3.6 kV~40. 5kV high voltage AC load switch |
|
4 |
GB/T 1984-2014 | High voltage AC circuit breaker |
|
5 |
GB/T 1985-2014 | High Voltage AC Disconnects and Earthing Switches |
|
6 |
GB 3309-1989 | Mechanical test of high voltage switchgear at room temperature |
|
7 |
GB/T 13540-2009 | Seismic Requirements for High Voltage Switchgear and Controlgear |
|
8 |
GB/T 13384-2008 | General technical requirements for packaging of mechanical and electrical products |
|
9 |
GB/T 13385-2008 | Packaging Drawing Requirements |
|
10 |
GB/T 191-2008 | Packaging, storage and transportation icons |
|
11 |
GB/T 311. 1-2012 | Insulation coordination - Part 1 Definitions, principles and rules |
Compact
High Flood
Small Volume
LIght Weight
Maintenance Free
Fully Insulated
SSU-12 Series SF6 Gas Insulated Ring Network Cabinet Overview
● The gas tank of SSU-12 series SF6 gas insulated ring network cabinet adopts high –quality 2.5mm thick stainless-steel shell. The plate is formed by laser cutting and automatically welded by an advanced welding robot to ensure the airtightness of the air box.
● The gas tank is filled with SF6 gas through synchronous vacuum leak detection, and the switch activities such as load switch, grounding switch, fuse insulating cylinder, etc.
● Components and bus bars are sealed in a stainless-steel air box, with compact structure, strong flood resistance, small size, light weight, maintenance-free, and full insulation.
● The protection level of the air box reaches IP67, and it is not affected by condensation, frost, salt spray, pollution, corrosion, ultraviolet rays and other substances.
● Various main wirings are realized by combining different modules to form a circuit switch system; the Busbar
● Connector is used to realize the arbitrary expansion of the cabinet body; fully shielded cable inlet and outlet lines.
Major component arrangement
① Main switch mechanism ② Operation Panel ③ isolation agency
④ Cable Warehouse ⑤ Secondary control box ⑥ Busbar connection sleeves
⑦ Arc extinguishing device ⑧ Isolation switch ⑨ Fully enclosed box
⑩ Internal pressure relief device of the box
Cable Warehouse
- The cable compartment can only be opened if the feeder has been isolated or grounded.
- The bushing conforms to DIN EN 50181, M16 bolted, and the lightning arrester can be attached to the rear of the T-cable head.
- The one-piece CT is located on the side of the casing, making it easy to install cables and is not affected by external forces.
- The height of the casing installation to the ground is greater than 650mm.
Breaker mechanism
The precision transmission mechanism with releasing function adopts V-shaped key connection, and the shaft system support of the transmission system adopts a large number of rolling bearing design schemes, which are flexible in rotation and high in transmission efficiency, thus ensuring the mechanical life of the product for more than 10,000 times. Can be installed and maintained at any time.
Solation Mechanism
Single spring double operating shaft design, built-in reliable closing, opening, grounding limit interlocking device, to ensure that closing and opening without obvious overshoot phenomenon. The mechanical life of the product is more than 10,000 times, and the electrical components are designed in front, which can be installed and maintained at any time.
Arc extinguishing devices and disconnect switches
The cam structure of the closing and dividing device, over travel and full travel are accurate in size and have strong production compatibility. Insulation siding plate adopts an SMC molding process, with precise size and high insulation strength.
The isolation switch is designed with three stations for closing, dividing and grounding, which is safe and reliable.
Main component arrangement
1. Load switches mechanism 2. Operation Panel
3. Cable Warehouse 4. Secondary control box
5. Busbar connection sleeves 6. Three-position load switch
7. Fully enclosed box 8. Internal pressure relief device of the box
Cable Warehouse
-The cable compartment can only be opened if the feeder has been isolated or grounded.
-The bushing conforms to DIN EN 50181, M16 bolted, and the lightning
Arrester can be attached to the rear of the T-cable head.
-Integrated CT is located on the side of the casing for easy cable
Installation and is not affected by external forces.
-The height of the casing installation to the ground is greater than 650mm.
Three-position load switch
The closing, opening and grounding of the load switch adopt a three-position design, which is safe and reliable. Rotary blade + arc extinguishing grid arc extinguishing, with good insulation performance and braking performance.
Load switch mechanism
Single spring double operation axis design, built-in reliable closing, breaking, grounding limit interlocking device, to ensure that the closing and breaking without obvious overshoot phenomenon. The mechanical life of the product is more than 10,000 times, and the front design of electrical components can be retrofitted and maintained at any time.
Main component arrangement
1.Combined electrical mechanism 2. Operating Panel 3. Three-position load switch
4. Cable Warehouse 5. Secondary control box 6. Busbar connection sleeves
7. Fuse cartridge 8. Lower grounding switch 9. Fully enclosed box
Cable Warehouse
-The cable compartment can only be opened if the feeder has been isolated or grounded.
-The bushing conforms to DIN EN 50181, M16 bolted, and the lightning arrester can be attached to the rear of the T-cable head.
-Integrated CT is located on the side of the casing for easy cable installation and is not affected by external forces.
-The height of the casing installation to the ground is greater than 650mm.
Three-position load switch
The closing, opening and grounding of the load switch adopt a three-position design, which is safe and reliable. Rotary blade + arc extinguishing grid arc extinguishing, with good insulation performance and braking performance.
Combined electrical mechanism
The combined electrical mechanism with quick opening (tripping) function adopts the design of double springs and double operating shafts, and built-in reliable closing, opening, and grounding limit interlocking devices to ensure that there is no obvious overshoot phenomenon in closing and opening. The mechanical life of the product is more than 10,000 times, and the electrical components are designed in front, which can be installed and maintained at any time.
Lower ground switch
When the fuse is blown, the lower ground can effectively eliminate the residual charge on the transformer side and ensure personal safety when replacing the fuse.
Fuse cartridge
The three-phase fuse cylinders are arranged in an inverted structure, and completely seal with the gas box surface by a sealing ring, which can ensure that the switch operation will not be affected by the external environment. When the fuse of any one phase is blown, the striker triggers, and the quick release mechanism trips quickly to open the load switch, so as to ensure that the transformer will not have the risk of phase loss operation.
SSG-12 solid-insulated ring-grid cabinets are not like SF6 switches where the air pressure gradually decreases at low temperatures, leading to insulation failure throughout the process.
SSG-12 eliminates the greenhouse gas SF6, and all materials used are non-toxic and environmentally friendly.
●SSG-12 solid insulated ring network cabinet is a smart cloud device with environmentally friendly materials, economical price and convenient operation.
● All conductive parts in the switch are solidified or sealed in solid insulating material.
● The main switch adopts vacuum arc extinguishing, and the isolating switch adopts a three-station structure.
● The adjacent cabinets are connected by solid insulated busbars.
● The secondary circuit adopts integrated control technology and supports data transmission function.
Parallel cabinet mode
Adopting fully insulated, fully enclosed standard European-style top expansion Busbar system, easy to install and low cost.
Cable Warehouse
● Open the cable compartment only if the feeder is isolated or grounded
● Bushings according to DIN EN 50181, M16 screw connection.
● Lightning arrester can be attached to the back of the T-cable head.
● The one-piece CT is located on the side of the casing, making it easy to install cables and is not affected by external forces.
● The height of the casing installation place to the ground is greater than 650mm.
Pressure relief channel
If an internal arc fault occurs, the special pressure relief device installed in the lower part of the body will automatically start to relieve pressure.
Circuit Breaker
● The high-voltage circuit adopts the pressure equalization shielding technology, and is sealed or sealed in the epoxy resin shell at one time.
● Vacuum arc extinguishing with sinusoidal curve mechanism, strong arc extinguishing ability, labor-saving closing and opening operation.
● The shaft system support of the transmission system adopts a large number of needle bearings, which is flexible in rotation and high on transmission efficiency.
● Rectangular contact spring is used, the face value is stable, and the mechanical and electrical life of the product is long.
Isolation switches
● The isolating switch adopts a three-position design to prevent misoperation.
● High-performance disc springs ensure the stability of contact pressure, and the contact design facilitates the closing shape, thus ensuring the reliability of the ground closing.
Isolation institution
The precision transmission mechanism to releasing function adopts spline connection, needle roller bearing and high-performance oil buffer design, so as to ensure the mechanical life of the product for more than 10,000 times.
Electric operation design
Both the circuit breaker mechanism and the three-position, isolation mechanism can be loaded with an electric operation scheme, and all electrical components are installed in front of the mechanism, which can be added and maintained at any time.
Three-station isolation mechanism and wide-angle lens
The three-position isolating mechanism with quick closing function is designed with a single spring and two independent operating shafts, and has a wide-angle lens for observing the isolating fracture, so as to avoid misoperation.
The customer only needs to install the core unit module in the cabinet complete sets.
Our company provides customers with a full range of cabinet drawings, secondary schematic diagrams, product manuals, promotional materials, technical consultation and other services for free.
The core unit module can be sold separately to the outside world. All parameters have been adjusted in place before delivery, so customers do not need to debug again.
The SSG-12Pro solid insulation ring main unit will not have the risk of insulation failure like the SF6 switch, where the air pressure gradually decreases at low temperature.。
The greenhouse effect gas SF6 is canceled, and all materials are non-toxic and harmless environmental protection materials.。
●SSG-12Pro adopts a three-phase split design, and its external dimensions meet the requirements of the national grid standard, and the outer surface of the insulator adopts a metallization coating process.
●SSG-12Pro is a new future-oriented switchgear with features such as self-diagnosis, maintenance-free, low temperature resistance, miniaturization, flexible splicing, and environmental protection.
● All conductive parts inside the switch are sealed in solid insulating material.
● The main switch adopts vacuum arc extinguishing, and the isolating switch adopts a three-station structure.
● The adjacent cabinets are connected by solid insulated busbars.
● The secondary circuit adopts integrated control technology and supports data transmission function.
Parallel cabinet mode
Fully insulated, fully enclosed top expansion Busbar system is used for easy installation.
Cable Warehouse
● Open the cable compartment only if the feeder is isolated or grounded
● Bushings according to DIN EN 50181, M16 screw connection.
● Lightning arrester can be attached to the back of the T-cable head.
● The one-piece CT is located on the side of the casing, making it easy to install cables and is not affected by external forces.
● The height of the casing installation place to the ground is greater than 650mm.
Pressure relief channel
If an internal arc fault occurs, the special pressure relief device installed in the lower part of the body will automatically start to relieve pressure.
Fully sealed operating mechanism
The circuit breaker adopts a precision transmission mechanism to releasing function, and the output track of the isolation mechanism is sinusoidal to ensure that the closing and opening positions are accurate. The mechanical room and the main circuit adopt a fully sealed design, and the secondary control circuit connection adopts a sealed plug structure. The switch can be immersed in water for more than 96 hours, completely avoiding mechanism, corrosion caused by external water vapor or pollution, failures such as refusal to open and close, and malfunction of the control circuit, resulting in skipping trips and eventually causing large-scale power outages.
Isolation switches
The isolating switch adopts the direct acting type and is equipped with a spring finger contact structure, which has small contact resistance, low temperature rise and large carrying capacity, ensuring that any switch can meet the short-term withstand current of 25 kA /4 seconds.
Insulation and sealing design
The phases adopt an independent compartment structure to avoid explosion accidents caused by short circuits between phases. The primary conductor adopts a circular or spherical structure and is equipped with high-voltage shielding outside. The surface of the insulator is coated with metal and grounded reliably to ensure uniform distribution of high-voltage electric fields and ensure that external pollution will not have any impact on the insulation system.
The customer only needs to package the core unit modules in the cabinet.
We provide customers with a full range of cabinet drawings, secondary schematic drawings, product manuals, promotional materials, technical consultation and other services free of charge.
The core unit module can be sold separately to the public, and all parameters have been adjusted in place before leaving the factory, so customers do not need to debug again.
The SSR-12 environmentally friendly gas-insulated ring panel does not run the risk of insulation failure as SF6 switches do when the air pressure gradually decreases at low temperatures.
The greenhouse effect gas SF6 is canceled, and all materials are non-toxic and harmless environmental protection materials.
●SSR-12 environmental protection gas insulated ring network cabinet is a digital ring network cabinet environmental protection materials, full insulation, full airtight, economical price and convenient operation.
● All the conductive parts in the switch are installed in a sealed stainless steel gas box, and the dry air is used as the insulating body in the gas box; the main switch adopts vacuum arc extinguishing, and the isolating switch adopts a three-station structure.
● The adjacent cabinets are connected by solid insulated busbars.
● The secondary circuit adopts integrated control technology and supports data transmission function.
Top and bottom isolated symmetrical design
The upper isolation and the lower isolation adopt a symmetrical design scheme, and all parts required for the operating mechanism and switch are common, which shortens the manufacturing cycle and facilitates quality management. Adjacent cabinets are connected by side expansion/top expansion.
Cable Warehouse
- The cable compartment can only be opened if the feeder has been isolated or grounded.
- The bushing complies with DIN EN 50181, M16 bolt connection.
- The lightning arrester can be attached to the back of the T-cable head.
- The one-piece CT is located on the side of the bushing for Easy installation of the cable and is not affected by external forces.
- The height from the casing installation of the ground is Greater than 650 mm.
Pressure relief channel
If an internal arc fault occurs, the special pressure relief device installed in the lower part of the cabinet will automatically open pressure relief.
Isolation mechanism
Single spring double operation shaft design, built-in reliable closing, opening, grounding limit interlocking device, to ensure that there is no obvious overshoot phenomenon of closing and opening. The mechanical life of the product is more than 10,000 times, and the electrical components are designed in front, which can be installed and maintained at any time.
Breaker mechanism
The precision transmission mechanism with releasing function adopts V-shaped key connection, and the shaft system support of the transmission system adopts a large number of rolling bearing design schemes, which are flexible in rotation and high in transmission efficiency, thus ensuring the mechanical life of the product for more than 10,000 times. Can be installed and maintained at any time.
Arc extinguishing device and isolating switch
Adopting cam structure of closing and dividing device, with precise size of over travel and full travel, and strong production compatibility. Insulation side plate adopts SMC molding process, with precise size and high insulation strength. The isolation switch adopts three-position design for closing, dividing and grounding, which is safe and reliable.
Breaker mechanism
The precision transmission mechanism with releasing function adopts V-shaped key connection, and the shaft system support of the transmission system adopts a large number of rolling bearing design schemes, which are flexible in rotation and high in transmission efficiency, thus ensuring the mechanical life of the product for more than 10,000 times. Can be installed and maintained at any time.
Isolation mechanism
Single spring double operation axial design, built-in reliable closing, breaking, grounding limit interlocking device, to ensure that the closing and breaking without obvious overshoot phenomenon. The mechanical life of the product is more than 10,000 times, and the front design of the electrical components can be retrofitted and maintained at any time.
Arc extinguishing devices and disconnect switches
The closing and opening device with cam structure has precise over-travel and full-stroke dimensions, and strong production versatility. The insulating side plate adopts SMC molding process, with precise size and high insulation strength.
The closing, opening and grounding of the isolating switch adopt a three-position design, which is safe and reliable.
Three-station isolation mechanism
Single spring double operation axial design, built-in reliable closing, breaking, grounding limit interlocking device, to ensure that the closing no obvious overshoot phenomenon. Product mechanical life More than 10,000 times, electrical components front design, can be added and maintained at any time. The front design of electrical components can be retrofitted and maintained at any time.
Three-station isolation mechanism
The isolating switch adopts a three-position design to prevent misoperation. The high-performance disc spring ensures the stability of the contact pressure and is conducive to the design of the contact shape of the closing shape, thereby ensuring the reliability of the grounding and closing.
The customer only needs to install the core unit module in the cabinet as a set.
We provide customers with a full range of free cabinet drawings, secondary schematic drawings, product manuals, promotional materials, technical advice and other services.
The core unit module can be sold separately to the public, and all parameters have been adjusted in place before leaving the factory, so customers do not need to debug again.
① The analog Busbar is clear and easy to operate.
② The main switch is made of alloy button, easy to operate and avoid aging.
③ The grounding switch is equipped with a "voltage blocking device" to prevent the grounding switch from being closed by mistake with electricity.
④ The isolation and grounding switches have two separate operation holes to avoid misoperation.
⑤ Operation hole with anti-misoperation cover and pad lockable.
⑥ Wide angle lens with its own illumination system for easy observation of the isolation break.
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