CLSF18-12 Fully Insulated Sealed Common-Enclosure Gas-Insulated Ring Main Unit
Compact modular switchgear. The sealed design provides high safety, long service life, and stable operation in harsh environments. IP67 protection. Maintenance-free design.
12Kv
Rated Voltage
Max 4000A
Rated Current
Max 50KA
Rated Short-circuit Current
IEC62271-200
IEC 60529
Industrial Standard
Configuration
OEM Customizable
FAT Test
Delivery Standard
Key Technical Data for Project Configuration
The following table is only a framework for critical performance data for fast project evaluation. The standard configuration range is not a universal promise.Technical Data Overview
| Parameter | Unit | Value | ||
|---|---|---|---|---|
| Rated Voltage | KV | 12 | ||
| Rated Frequency | Hz | 50 | ||
| Rated Insulation Level | 1 min Power Frequency Withstand Voltage Rated | Phase-to-Phase Gap | KV | 42 |
| Phase-to-Earth Gap | KV | 48 | ||
| Lightning Impulse Withstand Voltage (Peak) | Phase-to-Phase Gap | KV | 75 | |
| Phase-to-Earth Gap | KV | 85 | ||
| Main Busbar Rated Current | A | 630 | ||
| Branch Bar Rated Current | A | 630 | ||
| Rated Short-time Withstand Current (4s) | KA | 20 | ||
| Rated Withstand Current (Peak Value) | KA | 50 | ||
| Annual Gas Leakage Rate | % | ≤ 0.25 | ||
| Rated Operating Gas Pressure / Minimum Gas Pressure (+20 °C) | MPa | 0.04 ~ 0.02 | ||
| Mechanical Life | Load Break Switch | M1 Class (1,000 ops) / M2 Class (5,000 ops) | ||
| Earthing Switch | M0 Class (1,000 ops) / M1 Class (2,000 ops) | |||
| Protection (IP) Rating | SF₆ Gas Compartment | IP67 | ||
| Fuse Barrel | ||||
| Switchgear Enclosure | IP3X | |||
Switchgear Types & Voltage Range
Switchgear Type | Voltage Range | Common Application |
|---|---|---|
Low Voltage (LV) | Up to 1 KV AC | Buildings, factories, data centres |
Medium Voltage (MV) | 1 kV – 35 kV | Industrial plants, substations, renewable energy plants |
High Voltage (HV) | Above 35 kV | Transmission networks, power plants, substations |
LV, MV and HV Switchgear Technical Comparison
Parameter | LV Switchgear | MV Switchgear | HV Switchgear |
|---|---|---|---|
Voltage Range | Up to 1 kV | 1 kV – 36 kV | Above 36 kV |
Typical Applications | Buildings, Factories | Substations, Industry | Transmission Networks |
Interrupting Medium | Air | Vacuum / SF6 | SF6 / GIS |
Rated Current | Up to 6300 A | Up to 4000 A | Up to 5000 A |
Fault Current Rating | Up to 100 kA | Up to 63 kA | Up to 80 kA |
Installation Type | Indoor | Indoor / Outdoor | Outdoor / GIS |
Protection Complexity | Basic | Medium | Advanced |
Maintenance Requirements | Low | Medium | High |
Capital Cost | Low | Medium | High |
Typical Users | Commercial Facilities | Utilities & Industry | Transmission Operators |
Configure Your Switchgear Around Your System
Cabinet Drawing & Outline Dimensions (mm)
Component selection can be adapted to the electrical specification, protection philosophy, installation environment, and approved vendor requirements of the project.
Incoming Breaker
Selected according to rated current, fault level, and protection requirements.
Copper Busbar
Sized according to current carrying capacity, temperature rise, and short-circuit requirements.
Protection Relay
Protection and monitoring configured according to project requirements.
Metering
Provide voltage, current, power, and energy monitoring options.
Cable Compartment
Cable entry and termination arranged according to site conditions.
CLSF18-12 Key Applications & Operating Conditions
The CLSF18-12 is a compact modular switchgear for three-phase AC 50 Hz distribution networks at 12 kV. The gas tank is made of imported stainless steel and processed by advanced laser welding technology. It is hermetically sealed, filled with SF6 gas, and subjected to synchronous vacuum helium leak detection. Load switches, earthing switches, and fuse insulating cylinders are all sealed in the tank. The inflatable housing has an insulation class of IP67. The sealed design provides high safety, long service life, and stable operation in harsh environments. It is applicable to small secondary distribution substations, industrial and mining enterprises, airports, railroads, commercial districts, high-rise buildings, and tunnels. The equipment is in full compliance with IEC62271-200, IEC 60529, and the DL/T 791 industry standard.
Standards Compliance
GB3906 “3~35kV A.C. metal-enclosed switchgear.”
IEC 62271-200 ” High-voltage switchgear and controlgear – Part 200: AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV.”
IEC 60529 “The classification of degrees of protection provided by enclosures for electrical equipment with a rated voltage not exceeding 72,5 kV.”
Installation & Operating Conditions
Ambient air temperature
- Surrounding air temperature：-40℃~+40℃.
Altitude
- The applying altitude should not exceed 2000m.
Atmosphere
- No dripping water, no frost, no condensation, no flammable or explosive hazards, no chemically corrosive gases, no severe vibration.
- Earthquake intensity: ≤Magnitude 8
Humidity
- Relative humidity: the daily average value ≤95%, the monthly average value≤90%.
- Average vapour pressure: the daily average value ≤ 2.2 kPa, the monthly average value ≤ 1.8 kPa.
SSE CLSF18-12 Features
Switchgear is typically an enclosed system designed to distribute power safely, often connecting to transformers or motor control centres (MCCs), and may include devices such as variable speed drives or power distribution products. Choosing the correct switchgear involves more than matching voltage ratings.
Switchgear Applications Selection Reference
Application | Recommended Switchgear |
|---|---|
Commercial Buildings | LV Switchgear |
Data Centers | LV Switchgear |
Hospitals | LV Switchgear |
Manufacturing Plants | LV / MV Switchgear |
Mining Operations | MV Switchgear |
Renewable Energy Plants | MV Switchgear |
Utility Distribution Networks | MV Switchgear |
Substations | MV / HV Switchgear |
Transmission Networks | HV Switchgear |
Power Generation Plants | HV Switchgear |
Indoor vs Outdoor Switchgear Selection Reference
Standard | Indoor Switchgear | Outdoor Switchgear |
|---|---|---|
Space Availability | Limited Space | Large Sites |
Environmental Protection | Excellent | Moderate |
Maintenance Access | Moderate | Excellent |
Initial Investment | Higher | Lower |
Urban Projects | Recommended | Less Common |
Utility Substations | Possible | Common |
Environmental Selection Guide
Environment | Recommended Technology |
|---|---|
Industrial Plant | Metal-Clad Switchgear |
Coastal Area | Corrosion-Resistant Switchgear |
Desert Region | Dust-Protected Switchgear |
Urban Substation | GIS Switchgear |
Renewable Energy Plant | Vacuum Switchgear |
High Humidity Area | Sealed GIS Switchgear |
Heavy Pollution Zone | GIS / Metal-Enclosed Switchgear |
Find Your Path
Customer Role | First Question | What Details Should Care About |
|---|---|---|
EPC / System Integrator | Can you meet project drawings, schedule, site standards, and grid-connection requirements? | Project delivery workflow, lead time capability, engineering case studies, scope of delivery, selection parameters, layout drawings, certifications |
Distribution Contractor | Is the supplier reliable and quality consistent? Is it easy to procure, install, commission, and maintain? | Factory capability, quality control, certifications, brand components, configuration limits, installation dimensions, spare parts, manuals, after-sales terms |
Plant Owner / End User | Will it run safely and reduce outage and energy-loss risk? Is it easy to maintain? | Application pain points, reliability data, power quality, maintenance convenience, case studies, warranty, remote monitoring |
Distributor / Reseller | Can you support a stable product line and give technical backup? Do you offer supply continuity, customisation, and regional cooperation? | Product line coverage, regional partner policy, MOQ, OEM/ODM options, spare parts support, technical training, catalog downloads, lead time |
Technical Engineer | Do rated parameters, protection scheme, and configuration match? Does it meet the local grid code and certification requirements? | Voltage/current/IP/short-circuit ratings, single-line diagrams, cabinet configuration, IEC/UL standards, test reports, downloadable data, FAQ |
Configured to Your Project Requirements
Electrical
Mechanical
Components
Documentation
Tips: Final configuration is confirmed according to approved drawings, project requirements, and destination market needs
Switchgear Projects & Applications
Representative projects of CLSF18-12 Fully Insulated Sealed Common-Enclosure Gas-Insulated Ring Main Unit.
Power distribution solutions for small secondary substations and switching stations in constrained places.
6-35Kv
Voltage
~4000A
Current
China
Country
Substations
Application
Critical power supply and distribution for the transportation network.
6-35Kv
Voltage
~4000A
Current
China
Country
Railways
Application
Maintenance-free power distribution solutions for high-rise buildings and commercial complexes.
0.4-25Kv
Voltage
~2500A
Current
China
Country
Buildings
Application
Quality Control You Can See Before Shipment
Every switchgear cabinet that leaves our facility must pass through a five-stage quality assurance process, from raw materials to final release for shipment.
Verified Components Before They Enter Your Switchgear
All purchased components, such as circuit breakers, transformers, insulators, busbar material, and auxiliary devices, are verified against approved vendor lists and inspected upon receipt.Verifying Certificates & Test Data
Verify the certificates of conformity, type test reports, and factory test data.
Inspecting Structural Parts
Conduct dimensional and visual inspection of busbars, enclosures, and structural parts.
Testing Insulating Materials
Run sampling tests on insulating materials and other components.
Rejecting Non-Conforming Parts
Prevent defective components from entering the production line to safeguard the original reliability.
Precision Assembly That Meets the Drawing
Component assembly must strictly follow standard operating procedures to ensure worker safety while maintaining a clean, dust-free workshop environment.Torquing Every Bolted Connection
Tighten all bolted joints to specified torque values, with each connection point recorded for traceability.
Verifying Clearances & Phase Sequence
Check conductor clearances, creepage distances, and phase sequence against design drawings.
Testing Shutters, Interlocks & Truck Mechanisms
Verify shutters, interlocks, and the truck’s mechanical performance in different positions: service, test, and withdrawn.
Checking Wiring Against Schematics
Check all internal wiring against schematics, including ferrule identification, terminal tightening, and earthing continuity.
Every Panel Proves Safe in Electrical Verification
Before any energization, each panel undergoes a comprehensive program of routine tests in accordance with IEC 60298 and GB 3906.Measuring Main Circuit Resistance
Measure the resistance of the main circuit.
Applying Withstand Voltage Tests
Run a power-frequency withstand voltage test on the main circuit and auxiliary circuits.
Measuring Partial Discharge
Verify misoperation-prevention functions; detect partial discharge where specified.
Testing Relays & Verifying Metering
Test protection relays by secondary injection and verify metering accuracy.
Nothing Ships Only With Approval
The FAT confirms that the switchgear is built in conformity with the approved drawings, the technical specification, and all applicable standards.Repeating Comprehensive Checks
Perform visual and mechanical checks; verify design drawings, test procedures, and technical documents.
Running Key Tests Per Standards
Conduct tests per IEC standards and project specs, including withstand tests, primary/secondary injection tests, and corrosion resistance tests.
Re-Testing Before Release
Record deviations or non-conformities during FAT, take corrective measures, and re-test until all units pass before release.
Preparing Before Shipping
Issue the FAT report and release certificate; clean the cabinet surface.
From Our Factory Floor to Your Site, Intact and On Time
Shipment isn’t simply switchgear dispatched. Every step follows a controlled process covering final verification, export-grade protection, document preparation, and coordinated logistics.Packing for Export
Pack each cabinet in export-grade packaging with moisture proofing and shock absorbers.
Coordinating the Logistics
Manage the entire transport chain —booking, routing, and customs coordination—to ensure on-time delivery to the site.
Documenting Before Dispatch
Photograph and record packaging, loading, and container sealing.
Delivering the Full Dossier
Prepare a complete documentation package for every shipment: routine test reports, FAT protocol, operating manuals, and spare parts list.
Global Electrical Industry Partners & Customers
Provide customers with production line technical consultation, engineering design, design selection, engineering budgeting, factory automation, full-process training, installation, commissioning, and turnkey solutions for the entire factory.
Engineer Online
+86 123 456 7890
Standards & Certifications
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Sample documents available upon request.
Built for Fast, Safe Grid & Plant Integration
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Business Hours
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Location
Henan Province, China