XGN66-12 Fixed Metal-Enclosed Switchgear is a cost-effective complete set of switchgear specially developed for small 10kV general distribution scenarios. It precisely addresses the core pain points of small distribution scenarios - the high price of withdrawable middle-mounted cabinets (such as KYN28), the limited application scenarios of ring main units (such as XGN88), and the inability to meet the diverse general distribution needs. We adopt a box-type fixed universal structure, following international and domestic standards such as GB3906 and IEC60298. The rated voltage is AC 12kV, suitable for 3-10kV three-phase AC 50Hz single busbar systems. It can achieve power reception, distribution, and control, without complex operations. The structure is simple, stable, and reliable, and is an exclusive solution for small 10kV distribution scenarios, balancing practicality and economy.
All the advantages of the XGN66-12 Fixed Metal-Enclosed Switchgear are designed to meet the actual needs of small 10kV power distribution scenarios. They eliminate redundant functions and focus on the four core aspects of "universal, cost-effective, stable, and convenient". Compared to similar products, it better meets the procurement and usage requirements of small-scale scenarios, highlighting its cost-effectiveness.
Universal fixed structure, breaking through scene limitations: Adopting a box-type fixed universal structure, it differs from the dedicated attributes of ring main units, not limited to ring network distribution, and can perfectly adapt to various needs such as incoming lines, outgoing lines, metering, etc. of small 10kV distribution, whether it is a community distribution room, a small factory, or a small substation, it can be directly put into use. Its universality far exceeds that of the XGN88 ring main unit, and no additional customization is required based on the scene.
A cost-effective choice with a 40% cost reduction: Based on the simple design of a fixed structure, it eliminates the complex costs of movable components. Compared to the KYN28 middle-mounted cabinet, the price has been directly reduced by 40%. For small-scale power distribution scenarios, there is no need to spend a large amount of money on redundant extraction-type equipment. The XGN66-12 can meet all general power distribution needs, significantly reducing the initial procurement cost and improving the project's cost-effectiveness.
Stable and reliable, with an extremely low failure rate: Using a fixed structure, there are no movable components inside, reducing component wear and potential failure hazards, making the operation more stable. The failure rate is much lower than that of extraction-type equipment. For small-scale scenarios with stable loads and infrequent maintenance, this product does not require frequent shutdown for maintenance. It can operate stably for a long time, reducing later maintenance costs and avoiding power supply disruptions due to equipment failures.
Compact in size, easy to install and occupies little space: The cabinet design is compact, with a volume much smaller than traditional extraction-type switch cabinets, only 50% of that of ordinary switch cabinets. It occupies a small area, perfectly adapting to the limited space of small power distribution rooms. Using a floor-standing installation method, the installation process is simple, without complex construction. Whether it is for new scene installation or replacing old equipment, it can be quickly deployed, saving construction time and labor costs.
Junray Electrical pays great attention to the refinement of product details. The XGN66-12 Fixed Metal-Enclosed Switchgear design is tailored to meet the usage requirements of small power distribution scenarios. It ensures power supply safety with high-quality materials and eliminates concerns about procurement. It adopts a box-type universal fixed structure, with the cabinet body assembled from high-quality profiles, featuring high mechanical strength, a neat appearance, no need for welding, and flexible installation. It is equipped with IP4X sealed protection, effectively preventing dust and moisture from entering, protecting the internal high-voltage components from damage, and is suitable for various environments. It uses universal 10kV high-voltage components, with strong compatibility, suitable for various general power distribution needs, and convenient for later component replacement. The small cabinet design balances installation convenience and space utilization, further adapting to the usage scenarios of small power distribution rooms. Additionally, the cabinet is equipped with a reliable grounding system to ensure electrical safety.
With the advantages of universal compatibility, high cost-effectiveness, stability and reliability, XGN66-12 Fixed Metal-Enclosed Switchgear is widely used in various small-scale 10kV general power distribution scenarios, precisely matching the power distribution requirements of different scenarios. It can be put into use without additional modifications. In residential power distribution scenarios, it is suitable for 10kV general power distribution in residential areas, dedicated for small power distribution rooms, easy to install, and ensuring stable power supply for residents; in small factory scenarios, it is suitable for 10kV power distribution in small factories, with stable loads and low failure rates, meeting the power supply needs of factory production; in small substation scenarios, it is suitable for the power distribution tasks of small 10kV substations, with universal compatibility for incoming and outgoing lines, stable and reliable; in small infrastructure project scenarios, it is suitable for 10kV general power distribution in small infrastructure projects, easy to install, durable and long-lasting, ensuring the smooth progress of infrastructure projects.
This project involves the construction of a new 10kV power distribution system for a municipal sewage lift pumping station, classified as a critical facility requiring a Grade I power supply to ensure public service continuity. The station is equipped with high-power submersible sewage pumps, bar screens, aeration equipment, and an automated PLC control system, all operating continuously 24 hours a day. The on-site power distribution room presents a challenging indoor environment characterized by limited space, high humidity, heavy moisture, and poor ventilation.
For the high-voltage side, the project avoids bulky, high-cost KYN28 withdrawable switchgear and XGN15 ring main units. Instead, given the requirements for terminal power distribution, space constraints, and a humid environment, the XGN66-12 indoor fixed-type vacuum high-voltage switchgear was selected as the core equipment for 10kV incoming and outgoing lines, main transformer protection, and voltage monitoring.
Extremely limited space: Traditional withdrawable switchgear units are bulky and deep, making them unsuitable for the site; compact cabinets were required.
Humid and moisture-laden environment: Long-term high humidity and severe condensation in the pumping station make standard cabinets prone to surface tracking (creepage), corrosion, and insulation degradation.
Continuous load operation: Sewage pumps operate year-round, requiring high reliability with no tolerance for frequent tripping or insulation failures.
No ring network or withdrawable maintenance required: As a terminal distribution application, the interchangeability features of withdrawable switchgear are unnecessary; the priority is high cost-effectiveness and stability.
Minimal O&M personnel: The station is unmanned, requiring equipment that is maintenance-free, has a low failure rate, and features robust anti-misoperation capabilities.
To address the specific needs of the municipal pumping station—terminal power distribution, humid conditions, and space constraints—the high-voltage system utilizes XGN66-12 box-type fixed metal-enclosed switchgear. The configuration includes indoor vacuum circuit breakers, microprocessor-based integrated protection relays, dehumidification devices, and a comprehensive "five-prevention" interlocking system. Key Equipment Specifications
Model: XGN66-12 Indoor Fixed-Type High-Voltage Switchgear
Rated Voltage: 12kV (for 10kV distribution systems)
Rated Current: 630A/1250A
Short-circuit Breaking Current: 20kA/25kA
Insulation Structure: Fixed vacuum arc-extinguishing design with fully enclosed insulation; offers excellent moisture and condensation resistance.
Cabinet Structure: Compact, shallow-depth design with a minimal footprint; ideal for confined distribution rooms.
Protection Rating: IP4X (dust-proof, moisture-proof, and corrosion-resistant); suitable for the harsh environments of pumping stations.
Safety Features: Mechanical "Five-Prevention" interlocks, live-circuit indicators, electrical interlocks, and anti-misoperation mechanisms.
Ultra-compact structure for small spaces: Shorter depth and smaller volume compared to KYN28 withdrawable switchgear; fits perfectly into cramped pumping station distribution rooms without requiring civil engineering expansion.
Superior moisture and condensation resistance: Fully enclosed cabinet combined with dedicated dehumidification features; eliminates risks of insulation degradation and flashover caused by high humidity and water vapor in pumping stations.
Stable vacuum arc-extinguishing performance: Utilizes fixed vacuum circuit breakers offering strong arc-extinguishing capabilities, non-combustible operation, and maintenance-free performance; ideal for 24-hour continuous operation.
High cost-performance ratio: Lower cost than withdrawable switchgear; offers superior protection capabilities compared to ring main units (RMUs) and is well-suited for terminal transformer distribution.
Comprehensive "Five-Prevention" safety functions: Effectively prevents incorrect switching (opening/closing), opening doors while live, and closing onto a grounded circuit; suitable for unmanned operation scenarios.
Zero insulation failures in humid environments: No condensation-induced tracking, corrosion, or flashover/breakdown after commissioning; insulation performance remains stable over the long term.
Continuous and stable power supply: Precise protection operation with no nuisance tripping or failure to trip; ensures uninterrupted year-round operation of sewage pumps and automatic control systems.
Extremely low O&M costs: Fixed vacuum structure requires no gas refilling, overhauls, or frequent maintenance; ideal for unmanned pumping stations. An ideal solution to space constraints: the compact switchgear units were successfully installed in a cramped equipment room, saving on civil engineering modification costs. Successful municipal acceptance: the equipment's performance, protection rating, and "five-protection" safety features fully met the acceptance standards for municipal power distribution projects.
The XGN66-12 is an economical, high-performance high-voltage switchgear model ideal for municipal pumping stations, water treatment plants, small factories, and terminal substations, particularly in environments with limited space or high humidity. Unlike XGN15 ring main units (limited to ring network/load-break switch configurations) or KYN28 metal-clad switchgear (which are costly and bulky), the XGN66-12 combines vacuum circuit breaker protection, a compact footprint, excellent moisture resistance, and high cost-effectiveness. It stands as the most mature fixed-type switchgear design for terminal power distribution in civil, municipal, and small-scale industrial applications.
Junray Electrical is a professional Manufacturer, Supplier and Factory in China. It has been deeply engaged in the research and production of high-voltage power distribution equipment for many years, possessing a complete R&D, production and quality inspection system. Each device undergoes strict voltage resistance and insulation tests, meeting national industry standards and ensuring quality. This product is specially customized for small 10kV scenarios. It is more versatile and cost-effective compared to similar products. Additionally, we provide comprehensive pre-sale selection guidance and after-sales maintenance services. We can offer suitable recommendations based on the actual needs of customers, making the purchase process more convenient and the use more reassuring. This helps small power distribution projects reduce costs and improve efficiency.
Question: What is the main difference between XGN66-12 and KYN28 withdrawable middle-mounted switchgear, as well as XGN88 ring-main unit switchgear?
Answer: The core differences lie in cost-effectiveness and versatility: It is 40% cheaper than KYN28, has no redundant movable components, and is more suitable for small-scale scenarios; It is more versatile than XGN88, not limited to ring network power distribution, and can be adapted for incoming lines, outgoing lines, and metering, without the need for scenario customization.
Question: What is the protection level of XGN66-12 Fixed Metal-Enclosed Switchgear and which environments can it adapt to?
Answer: The protection level is IP4X. It can effectively prevent dust and water, and can adapt to common environments such as small factories, community distribution rooms, and small construction sites. It effectively protects the internal high-voltage components and avoids equipment failures caused by dust and moisture.
Question: Is the fixed structure difficult to maintain in the later stage?
Answer: This product has stable load capacity and an extremely low failure rate. Moreover, in small-scale scenarios, maintenance is rarely required. If maintenance is necessary, the internal component layout is neat, the operation is convenient, and there is no need for a complex disassembly process. At the same time, it supports maintenance in the circuit breaker room while the main busbar is energized, without affecting the overall power supply.
Address
No. 318, Weidian Road, Economic Development Zone, Yueqing City, Zhejiang Province, China
Tel
