12KV AC Metal-enclosed Ring Main Unit Switchgear XGN15-12
XGN15-12 AC Metal-enclosed Switchgear Introduction
The sulfur hexafluoride (SF6) switch serves as the master switch of the XGN15-12 AC Metal-enclosed Switchgear, a key equipment widely applied in 10KV power distribution systems. Adopting air insulation technology, this switchgear is especially suitable for distribution automation scenarios, perfectly matching the development needs of smart power grids. It features a compact structure, strong extensibility, simple design, flexible operation, reliable performance and easy installation, which enables it to be widely used in various places such as industrial plants, power stations, commercial buildings, hospitals, airports and residential communities, effectively meeting the diverse requirements of different users.
To enhance its performance and adaptability, the XGN15-12 switchgear integrates advanced sensor technology and the latest microcomputer protection system, boasting advanced technical functions and a flexible assembly plan. These advantages allow the switchgear to flexibly respond to the changing market demands and adapt to the upgrading trend of power distribution automation. It fully complies with relevant national and international standards such as GB3906, IEC298, IEC60265-1 and GB3804, ensuring high safety and stable operation performance.
The master switch of the XGN15-12 switchgear offers multiple options to meet different application needs. It can be FLN36 type and FLN48 type SF6 load switches, as well as ABB original SFG type SF6 gas-insulated three-position load switches. Among them, the FLN36 type SF6 load switch adopts a reinforced epoxy resin vacuum casting shell, filled with SF6 gas as the insulation and arc-extinguishing medium, with a rated pressure of 0.045MPa at 20℃, and features double breaks and rotating moving contacts, available in three working positions (closing, opening, grounding) or two working positions (closing, opening, unlocking). The FLN48 type SF6 load switch is efficient, safe and reliable, with an annual leakage rate of ≤0.1% and strong environmental adaptability. The ABB original SFG type is a three-position load switch with a sealed air chamber cast by epoxy resin, equipped with an observation window for real-time monitoring of contact status and a pressure gauge for gas density detection, ensuring operational safety.
In addition, according to user requirements, we can also configure ABB original VD4/S, HD4/S circuit breakers and VS1 circuit breakers for the XGN15-12 switchgear. These circuit breakers have excellent breaking performance, with the HD4/S being an SF6 automatic puffing type spring-operated circuit breaker, and the VD4/S featuring high rated current and reliable operation, which can further improve the protection level and operational stability of the switchgear, making it more suitable for complex power distribution scenarios. The flexible configuration of the master switch and circuit breaker enables the XGN15-12 switchgear to adapt to different power distribution requirements, providing safe, efficient and reliable power distribution solutions for various industries.
Switchgear Working Condition
The normal and stable operation of the switchgear is closely related to the working environment. To ensure the safety, reliability and long service life of the switchgear, it must be installed and used under the following specified working conditions, which comply with the relevant requirements of GB3906/IEC298 standards and are applicable to various power distribution scenarios such as industrial plants, power stations and commercial buildings.
Key Working Condition Parameters
Altitude: The installation and use altitude of the switchgear shall not exceed 1000m. Exceeding the specified altitude may affect the insulation performance of the equipment, increase the risk of electrical breakdown, and thus affect the stable operation of the power distribution system.
Ambient Temperature: The ambient temperature during operation shall be within the range of -15°C to +40°C. Too high or too low temperature will affect the performance of electrical components such as the operating mechanism and insulation materials, leading to reduced equipment efficiency or even failure.
Relative Humidity: The daily average relative humidity shall not exceed 95%, and the monthly average relative humidity shall not exceed 90%. Excessive humidity will cause moisture condensation inside the equipment, corrode electrical components, and affect the insulation and arc extinction performance of the switchgear.
Surrounding Environment: The surrounding air shall be free of corrosive gases and water vapor, which can avoid corrosion of the equipment shell, bus-bars and other components, and ensure the integrity of the equipment structure and electrical performance. At the same time, the switchgear is not applicable to places with frequent violent vibrations, because violent vibrations will loosen the internal components, damage the connection parts, and cause equipment failure or safety hazards.
Adhering to the above working conditions is the basic guarantee for the long-term stable operation of the switchgear. It is recommended to conduct regular inspection of the operating environment to ensure that all parameters meet the specified requirements, so as to avoid equipment damage and safety accidents caused by unsuitable working conditions. The switchgear designed according to these working conditions can adapt to most conventional power distribution environments and provide reliable power support for various electrical equipment.
Switchgear Structural feature
The switchgear is a key electrical equipment widely used in power distribution systems, consisting of bus-bar compartment, load switch (with three working positions) or circuit breaker compartment, cable compartment, operation mechanism, interlocking device, low voltage control compartment, measuring or counter circuit, etc. Each compartment is separated by steel plates to effectively isolate fault parts, prevent fault expansion, and ensure the safe and stable operation of the entire power distribution system. It fully complies with the technical requirements of GB3906/IEC298, meeting international and national standards for electrical equipment safety and performance.
Bus-bar Compartment
The bus-bar compartment is located in the upper part of the switchgear, a core part for power transmission and distribution. Inside this compartment, the main bus-bars are connected as a whole, adopting a horizontal layout design that facilitates extension and expansion. This layout not only simplifies the installation and maintenance process but also ensures stable current transmission, making it suitable for various power distribution scenarios such as industrial plants, commercial buildings, and power stations. The horizontal bus-bar design is a key advantage of the switchgear, improving the efficiency of power distribution and reducing the risk of contact failure.
Load Switch Compartment
The switchgear is equipped with a load switch with two or three working positions, which is crucial for controlling and protecting the power circuit. The switch cover is made of high-quality epoxy resin, featuring excellent insulation performance and corrosion resistance. The compartment is filled with SF6 gas, which serves as both the arc extinction medium and insulation medium, ensuring reliable arc extinction effect and effective insulation protection during switch operation. Two hot-pressed transparent plastic covers are installed at the shaft outlet, allowing operators to clearly observe the contact state of the switch, facilitating daily inspection and fault troubleshooting. Additionally, an SF6 gas density meter can be configured according to customer requirements, real-time monitoring the gas density to avoid potential safety hazards caused by gas leakage.
Cable Compartment
The cable compartment is specially designed for cable connection, capable of connecting single-core cables with the simplest unshielded cable heads, simplifying the cable connection process and reducing installation costs. The compartment has sufficient internal space, which can also accommodate surge arresters, current transformers, earthing switches, and other key components, integrating multiple functions to meet the diverse needs of power distribution systems. In accordance with switchgear standards, the panel is equipped with an observation window and safety interlock device, ensuring the safety of operators during inspection and operation. The baseboard is provided with sealed caps and supported cable clamps, effectively fixing the cables, preventing cable loosening, and ensuring stable cable connection and waterproof and dustproof performance.
Operation Mechanism, Interlock Device and Low Voltage Controller
The low voltage compartment integrated with an interlocking device can also be used as a control panel, integrating control and protection functions to improve the integration degree of the switchgear. The low voltage compartment is equipped with a spring operating mechanism with a position indicator and a mechanical interlocking device, ensuring accurate switch position indication and reliable interlocking protection, preventing misoperation and ensuring operational safety. Moreover, auxiliary contacts, breaking coils, emergency trip mechanisms, capacitive live displays, key locks, and electric operating mechanisms can be installed in the low voltage compartment according to actual needs, enhancing the functionality and operability of the switchgear. At the same time, there is sufficient remaining space in the compartment for arranging control circuits, metering devices, and protection relays, facilitating subsequent expansion and maintenance.
For the 750mm type switchgear, two identical low voltage compartments are designed to accommodate more electrical components, meeting the needs of large-scale power distribution systems and complex working conditions. This design improves the flexibility and scalability of the switchgear, making it applicable to a wider range of power distribution scenarios.
Key Advantages of the Switchgear
Complies with GB3906/IEC298 standards, ensuring high safety and reliable performance
Independent compartment design with steel plate separation, effectively isolating faults and preventing expansion
SF6 gas insulation and arc extinction, stable performance and long service life
Transparent observation window and safety interlock, convenient inspection and safe operation
Flexible design, customizable components and compartments according to customer needs
Easy installation, maintenance and expansion, suitable for various power distribution scenarios
The switchgear is widely used in power distribution systems of industrial and mining enterprises, power plants, substations, commercial buildings, residential communities, and other fields, providing safe, stable, and efficient power distribution solutions for various electrical equipment. With its excellent performance, reasonable structure, and customizable design, it has become an indispensable key equipment in modern power distribution systems.
Switchgear Technical Parameter
| No. | Item | Unit | Data | ||
| XGN15-12(F) XGN15-12(F.R) | |||||
| 1 | Rated voltage | KV | 12 | ||
| 2 | Rated frequency | Hz | 50 | ||
| 3 | Rated insulation level | 1 min power frequency withstand voltage | KV | To earth and phase to phase 42;Fracture 48 | |
| Lightning impulse withstand voltage (peak) | KV | To earth and phase to phase 75;Fracture 85 | |||
| 4 | Rated current of main bus bar | A | 630 | ||
| 5 | Rated current | A | 630 | 125 | |
| 6 | Rated breaking current loop | A | 630 | ||
| 7 | Rated active load current breaking current | A | 630 | ||
| 8 | Rated charging breaking current | A | 10 | ||
| 9 | Rated transfer current | A | 1700 | ||
| 10 | No-load transformer breaking capacity | KVA | 1600 | ||
| 11 | Rated making current (peak | KA | 63 | ||
| 12 | Rated short time withstand current (2s) | KA | 25 | ||
| 13 | Rated peak withstand current | KA | 63 | ||
| 14 | Rated short circuit breaking current | KA | |||
| 15 | Peak withstand current of ground loop | KA | 63 | 31.5 (expected) | |
| 16 | Short time withstand current of ground loop (2s | KA | 25 | ||
| 17 | Fuse type | S□LAJ | |||
| 18 | Auxiliary circuit voltage | V | DC220、110、AC220、110 | ||
| 19 | Profection | IP3X | |||
| 20 | Mechanical life | Load switch | Times | 5000 | |
| Earthing switch | Times | 2000 | |||
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