Overview
Since 1950s, the development of medium voltage switchgear has gone through open, box and metal closed stages. There is no problem in meeting the functional requirements of the equipment, and the products have already been serialized and the scope of use has been fully covered.
The environment-friendly gas insulated ring network cabinet with small size, maintenance-free, high modularity, safety and reliability has developed rapidly, which can realize remote monitoring, control and management of power system distribution network, and realize the needs of power grid optimization, electricity safety, power management, energy saving and consumption reduction; At the same time, the system can be widely used in intelligent power distribution fields such as transportation, factories, hospitals, schools, buildings, residential quarters and commercial office buildings.
XCHBN-12 energy-saving and environment-friendly all-insulated ring network cabinet has fully introduced leading production equipment and manufacturing technology, realized localized production, greatly reduced manufacturing cost and shortened delivery cycle, and was well received by users after its launch.
Product features
◇ Functional composite and integrated products
The inflatable shell of switch equipment is made of high-quality stainless steel plate with thickness of 2.5mm by laser welding, which ensures the sealing reliability of air box, high mechanical strength and good corrosion resistance, and the protection level of inflatable shell reaches IP67；; The gas box is equipped with explosion-proof membrane, which can effectively prevent the damage to people and equipment when the air pressure is too high; Sealing all conductive parts in the air box can not only avoid the influence of external environmental factors, but also improve the operation reliability, so that it has the function of maintenance-free (or less maintenance), and can also meet the requirements of miniaturization.
The switch adopts three stations (isolation+grounding)+vacuum arc extinguishing chamber, which is the most mature configuration mode at present, especially suitable for the current power grid operation and maintenance requirements.
◇ Environmental protection and no pollution
The insulating medium of XCHBN-12 series inflatable cabinets is zero-grade dry air (purchased) or 99.99% pure N2 conforming to GB/T 8979- 2008. The leakage of gas will not cause any impact on the external environment, and no recovery treatment is needed.
◇ Complete mechanical chain
The operating panel of XCHBN-12 series inflatable cabinet has perfect five-prevention mechanical interlocking function, and all interlocking functions have been configured internally. Please operate according to the operating instructions in order to make it very convenient to use.
◇ Flexible and expanded design
XCHBN-12 series inflatable cabinets are modular in design, and various modules can be combined with various units through special bus connectors, so as to meet the complex and diverse power distribution design schemes in various places in China to the maximum extent.
Product mix
1. Ammeter
2. Microcomputer integrated protection device
3. Capacitive live indicator The live indicator shows whether the casing is live, and the three sockets below the indicator can be used for secondary nuclear phase. The live indicator is provided with a switch button, which effectively prolongs the service life.
4. Fault indicator Detect the current in the power supply line, and give an alarm indication when short-circuit fault current and ground fault current appear.
5. Isolate the observation window Through this observation window, you can see the opening and closing of the grounding switch and whether the isolating switch is closing or opening.
6. Grounding switch operation hole Use the operating handle to turn the operating shaft of the grounding switch to open and close the grounding.
7. Main switch energy storage indication Observing the energy storage indication of the main switch can grasp the energy storage situation of the operating mechanism of the main switch .
8. Energy storage operation hole Use the operating handle to rotate the shaft of the energy storage mechanism, so that the main switch operating mechanism can store energy.
9. Padlock device for energy storage operation hole The padlock plate linked with the padlock device shields the energy storage operation hole, and the operation handle can be inserted into the operation hole only by toggling the padlock device. Padlocks can be configured when not in operation to prevent unauthorized personnel from misoperation.
10. counter indication Indicates the cumulative opening and closing times of the main switch operating mechanism. 11. Cable room door
12. Remote/local conversion switch The remote/local conversion switch is used to realize the conversion of control mode between local control and background control.
13. Isolated lighting button The switch of illumination lamp is controlled by the illumination button of observation window.
14. Analog circuit diagram Indicates whether the main switch and grounding switch are on or off
15. barometer Displays the air pressure inside the air box relative to the outside.
16. Operating hole of isolating switch
The isolating switch can be opened and closed by turning the operating shaft of the isolating switch with the operating handle
17. padlock device for isolating switch operation hole and grounding switch operation hole The padlock plate linked by padlock device blocks the grounding switch operation hole or isolation operation hole, and only by toggling the padlock device can the operation handle be inserted into the grounding switch operation hole or isolation switch operation hole. Padlocks can be configured when not in operation to prevent unauthorized personnel from misoperation.
18. the main switch closing button The main switch can be closed by the closing button
19. main switch opening button The main switch can be opened by opening button
20. Cabinet door interlocking device The cable room door is interlocked with the grounding switch. When the interlocking mechanism is installed, the cable room door can only be opened when the grounding switch is in the grounding closing position and the cabinet door is interlocked and pulled to the unlocking position. After the cabinet door is opened, the switch cannot be operated.
21. cable room observation window
Model and meaning
Note: the enterprise model is defined as follows
XCHBN-E-V: scalable circuit breaker scheme
XCHBN-E-C: scalable load switch scheme
XCHBN-E-T: expandable load switch-fuse combination electrical appliance scheme
XCHBN-V/C/C: non-expandable circuit breaker+load switch+load switch three-unit common box scheme
Operational environment
◇ Altitude: ≤ 2000m (installation altitude exceeds 2000m);
◇ Ambient temperature: Maximum temperature: 40℃ ; Minimum temperature:-40℃ ; The average temperature within 24 hours does not exceed 35℃ ;
◇ Ambient humidity: the average relative humidity within 24 hours does not exceed 95%; The average monthly relative humidity does not exceed 90%;
◇ Installation environment: there is no explosive and corrosive gas in the surrounding air, and there is no severe vibration impact in the installation site;
◇ Seismic cracking degree: 8 degrees.
According to standards
Common technical requirements of GB/T 11022—2011 high voltage switchgear and control equipment standard
GB 3906—2006 3.6 kV ~ 40.5 kV AC metal enclosed switchgear and control equipment
GB 1984—2014 high voltage AC circuit breaker
GB 3804—2004 3.6 kV ~ 40.5 kV high voltage AC load switch
GB 16926—2009 high voltage AC load switch-fuse combination electrical appliance
GB 1985—2014 high voltage AC isolating switch and grounding switch Mechanical test of high voltage switchgear at room temperature
DL/T404-2007 3.6kV~40.5kV AC metal enclosed switchgear and control equipment
JB/T 3855—2008 3.6 kV ~ 40.5 kV Indoor AC High Voltage Vacuum Circuit Breaker
GB4208-2008 enclosure protection level (IP code)
GB/T 4205—2010 man-machine interface (MMI)— operating rules
GB/T 6388—1986 marks of receipt and delivery of transport packages
GB 9969—2008 general instructions for industrial products
GB/T 13384—2008 general technical conditions for packaging of mechanical and electrical products
GB/T 14436—1993 general principles of industrial product guarantee documents
GB/T 191—2008 graphic signs of packaging, storage and transportation
The above parameters meet the technical specifications of Class II grounding system of 12kV ring network switchgear of State Grid Corporation, China Southern Power Grid Corporation and Jiangsu Electric Power Company, and are fully compatible with different neutral grounding methods. With XCHBN-12 serial 12kV cable accessories, three cable connection combinations or two cables plus one lightning arrester connection combination can be realized. Remarks: Class I: neutral point grounding system with low resistance; Class ii: system with neutral point grounded or ungrounded via arc suppression coil.
Basic unit scheme
The load switch unit C
Standard configuration and features:
630A bus
Vacuum load switch
Manual operating mechanism of vacuum load switch
Three-station isolating switch
Manual operating mechanism of three-station isolating switch
Position indicator of load switch and three-station isolating switch
Cable connecting sleeve
Capacitive voltage indicator showing the electrification of bushing
Pressure gage
Padlock device
Cabinet
Grounding bus bar
Operating handle
Optional configurations and features:
Electric operating mechanism of vacuum load switch
Short circuit and ground fault indicator
Detachable connector (cable joint)
Lightning arrester
Live grounding locking device for incoming line
Mechanical interlocking device of key
Ring current transformer
Vacuum circuit breaker unit V
Standard configuration and features:
Bus 630A/1250A
Vacuum switch
Electric operating mechanism of vacuum switch
Three-station isolating switch
Manual operating mechanism of three-station isolating switch
Position indicator of vacuum switch and three-station isolating switch
Cable connecting sleeve
Capacitive voltage indicator showing the electrification of bushing
Pressure gage
Padlock device
Cabinet
Grounding bus bar
Operating handle Current transformer (special for protection)
Digital relay protection device
Optional configurations and features:
Short circuit and ground fault indicator
Detachable connector (cable joint)
Lightning arrester
Live grounding locking device for incoming line
Mechanical interlocking device of key
Annular current transformer and meter
