IEE Business offers free, AI-powered tools for electrical engineering design and power procurement budgeting: enter your parameters, click calculate, and get instant results for transformers, wiring, motors, power equipment costs, and more — trusted by engineers worldwide.
XGN15-12 is a compact, expandable air-insulated metal-enclosed ring main unit (RMU) designed for power distribution automation. It uses FLNO-12 SF6 load switch as the main switching device, featuring simple structure, flexible operation, reliable interlocking and convenient installation, and can provide customized technical solutions for diverse application scenarios and user requirements.
The main switch can be our self-produced FLN36-12/FLN48-12 SF6 load switch or Rockwill SFG SF6 load switch. It can also be equipped with VS1, VD4/S, ISM vacuum circuit breakers or HD4/55 SF6 circuit breakers according to user needs. Both load switches and circuit breakers support manual and electric operation; with optional electric operating mechanisms, PT, CT, FTU and communication devices, it can fully realize intelligent distribution automation functions.
Key Features
Compact & Expandable Structure:Air-insulated modular design ensures small footprint and flexible system expansion, adapting to limited space in distribution stations.
Flexible Configuration Options:Supports multiple SF6 load switches and circuit breakers (domestic and international brands), enabling customized protection and switching schemes.
Dual Operation Modes:Main switch can be operated manually or electrically, meeting both on-site maintenance and remote automatic control needs.
Distribution Automation Ready:Compatible with FTU/communication devices to realize remote control, measurement and monitoring, supporting intelligent power grid operation.
Reliable Safety & Interlocking:Equipped with reliable mechanical and electrical interlocks to prevent misoperation, ensuring personnel and equipment safety.
Strong Environmental Adaptability:Suitable for high altitude up to 2000m and temperature range -25℃~+40℃, with resistance to corrosive gases and vibration.
Application Scenarios
12kV/50Hz industrial and civil cable ring networks and power supply terminals
Urban residential quarters, industrial parks and mining enterprises
Small secondary substations, switching stations and box-type substations
Commercial complexes, shopping malls, hospitals, stadiums and public facilities
Infrastructure projects: airports, subways, railways, bridges and tunnels
Renewable energy projects: wind power generation and distributed energy grid connection
Data centers, high-rise buildings and places requiring reliable, compact power distribution
Normal Operating Conditions
Ambient temperature: -25℃ ~ +40℃
Relative humidity: daily average ≤95%, monthly average ≤90%
Altitude: ≤2000m
Seismic capacity: Grade 8
Free from explosive/corrosive gases, violent vibration and shock
Workplace: 30000m² Total staff: Highest Annual Export(usD): 100000000
Services
Business Type: Design/Manufacture/Sales
Main Categories: High Voltage Electrical Apparatus/Low Voltage Electrical Apparatus/Instrument meters/New energy/Tester/Robot
Whole life care manager
Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.
The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.
Negotiable
Pricing calculator
Warranty by
Whole life care manager
Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.
The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.
1. Accident Record (March 19, 2019)At 16:13 on March 19, 2019, the monitoring background reported a light gas action of No. 3 main transformer. In accordance with the Code for Operation of Power Transformers (DL/T572-2010), operation and maintenance (O&M) personnel inspected the on-site condition of No. 3 main transformer.On-site confirmation: The WBH non-electrical protection panel of No. 3 main transformer reported a Phase B light gas action of the transformer body, and the reset was ineff
Characteristics and Detection Devices for Single-Phase Ground Faults1. Characteristics of Single-Phase Ground FaultsCentral Alarm Signals:The warning bell rings, and the indicator lamp labeled “Ground Fault on [X] kV Bus Section [Y]” illuminates. In systems with a Petersen coil (arc suppression coil) grounding the neutral point, the “Petersen Coil Operated” indicator also lights up.Insulation Monitoring Voltmeter Indications:The voltage of the faulted phase decreases (in
The arrangement of neutral point grounding operation modes for 110kV~220kV power grid transformers shall meet the insulation withstand requirements of transformer neutral points, and shall also strive to keep the zero-sequence impedance of substations basically unchanged, while ensuring that the zero-sequence comprehensive impedance at any short-circuit point in the system does not exceed three times the positive-sequence comprehensive impedance.For 220kV and 110kV transformers in new constructi
Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?In substations, equipment such as power and distribution transformers, transmission lines, voltage transformers, current transformers, and disconnect switches all require grounding. Beyond grounding, we will now explore in depth why gravel and crushed stone are commonly used in substations. Though they appear ordinary, these stones play a critical safety and functional role.In substation grounding design—especially when multiple gr
Why Does the Transformer Core Need to Be Grounded?During operation, the transformer core, along with the metal structures, parts, and components that fix the core and windings, are all situated in a strong electric field. Under the influence of this electric field, they acquire a relatively high potential with respect to ground. If the core is not grounded, a potential difference will exist between the core and the grounded clamping structures and tank, which may lead to intermittent discharge.I
I. What is a Neutral Point?In transformers and generators, the neutral point is a specific point in the winding where the absolute voltage between this point and each external terminal is equal. In the diagram below, pointOrepresents the neutral point.II. Why Does the Neutral Point Need Grounding?The electrical connection method between the neutral point and earth in a three-phase AC power system is called theneutral grounding method. This grounding method directly affects:The safety, reliabilit
The combination of Solid Insulation Assist + Dry Air Insulation represents the development direction for 24kV RMUs. By balancing insulation requirements with compactness and employing solid auxiliary insulation, insulation tests can be passed without significantly increasing phase-to-phase and phase-to-ground dimensions. Encapsulating the pole column solidifies the insulation for the vacuum interrupter and its connecting conductors.Maintaining the 24kV outgoing busbar phase spacing at 110mm, the
With the rapid development of the power industry, the ecological concept of low-carbon, energy-saving, and environmental protection has been deeply integrated into the design and manufacturing of power supply and distribution electrical products. The Ring Main Unit (RMU) is a key electrical device in distribution networks. Safety, environmental protection, operational reliability, energy efficiency, and economy are inevitable trends in its development. Traditional RMUs are primarily represented
Introduction:10kV gas-insulated RMUs are widely used due to their numerous advantages, such as being fully enclosed, possessing high insulation performance, requiring no maintenance, having a compact size, and offering flexible and convenient installation. At this stage, they have gradually become a critical node in urban distribution network ring-main power supply and play a significant role in the power distribution system. Problems within gas-insulated RMUs can severely impact the entire dist
Haven't found the right supplier yet? Let matching verified suppliers find you.Get Quotation Now
Haven't found the right supplier yet? Let matching verified suppliers find you. Get Quotation Now
×
Send inquiry
Download
Get the IEE Business Application
Use the IEE-Business app to find equipment, obtain solutions, connect with experts, and participate in industry collaboration anytime, anywhere—fully supporting the development of your power projects and business.