Key Features of Medium Voltage GIS Switchgear
Compact Space-Saving Layout
Thanks to the fully enclosed modular GIS structure, the cabinet takes up far less room than conventional air insulated switchgear. It fits perfectly into compact indoor substations, narrow electrical rooms and densely built urban power distribution premises.
Stable Long-Term Operation
The sealed SF6 gas insulation barrier keeps live parts away from humidity, dust, chemical pollution and salt fog, cutting down unexpected breakdowns and delivering consistent performance year after year.
Optimized Operator Safety
The full metal enclosed shell prevents accidental contact with energized parts. A complete mechanical interlock system blocks all wrong operating sequences during switching, maintenance and earthing work, fully meeting international medium voltage equipment safety norms.
Flexible Modular Combination
Users can freely combine different functional units to match unique project requirements:
- Load Break Switch Panels
- Circuit Breaker Panels
- Fuse Protection Units
- Metering Panels
- Busbar Extension Units
- Cable Connection Panels
It adapts smoothly to ring main power supply, incoming line protection, energy metering and later system expansion projects.
Low Maintenance Demand
The lifetime-sealed stainless steel gas tank stops internal parts from being contaminated. Daily inspections are simple, mainly covering mechanical operation checks, SF6 gas density monitoring, cabinet visual checks and secondary circuit testing.
Extended Service Life
We adopt high-grade insulating materials and precision machined mechanical parts. Every unit passes strict endurance cycling tests, maintaining reliable switching performance through tens of thousands of operations over decades of grid use.
Technical Advantages
1. Superior Insulation Capacity: SF6 insulating gas delivers strong dielectric strength, enabling compact cabinet sizing without compromising electrical safety for 24kV working conditions.
This sealed modular layout is the core design trait of Siemens medium voltage ring main units. To fully understand its internal operation rules, read our guide on Siemens switchgear structure and working principle.
2. Smaller Installation Footprint: Compact construction reduces substation civil work costs and maximizes usable space inside electrical rooms.
3. Wide Environmental Adaptability: The sealed structure withstands damp, dusty, corrosive and coastal salt-laden air, ideal for factories, mines and seaside power stations.
4. Consistent System Performance: All modules are pre-assembled and fully tested at our factory, lowering on-site assembly errors and boosting overall grid stability.
5. Lower Total Lifecycle Cost: Infrequent maintenance, high reliability and long service life greatly reduce later operation expenses for asset owners.
Core Technical Parameters
All indicators comply with IEC 62271 international standards, adjustable based on individual project demands:
| Item | Detailed Specification |
| Rated Voltage | Up to 24kV |
| Rated Frequency | 50/60Hz |
| Rated Current | Max 630A (customizable) |
| Short-Time Withstand Current | 20~25kA |
| Insulation Medium | SF6 Gas |
| Installation Style | Indoor |
| Cabinet Structure | Metal Enclosed GIS |
| Protection Class | IP4X |
| Main Switching Device | Load Break Switch / Vacuum Circuit Breaker |
| Applicable Standard | IEC 62271 Series |
Optional Functional Configurations
Load Break Switch Panel
Designed for daily ring network switching, cable loop segmentation and regular load closing/opening work, the most widely used unit for conventional secondary distribution grids.
Circuit Breaker Panel
Installed on incoming and important feeder circuits to protect distribution transformers; paired with digital protection relays, it quickly cuts off overload and short-circuit faults.
Fuse Protection Unit
A cost-effective protection option for compact substations and small distribution transformers, popular in industrial and commercial power supply systems.
Metering Panel
Integrates voltage & current acquisition hardware for grid energy measurement, power consumption monitoring and utility billing management.
Busbar Extension Unit
Reserves space for future grid capacity expansion, avoiding full cabinet replacement and saving repeated project investment costs.
Main Application Scenarios
Municipal Power Utilities
Urban & rural secondary distribution network reconstruction, ring main unit layout and compact substation construction projects.
Renewable Energy Projects
PV power plants, wind farms and battery energy storage stations, used for grid connection and fault protection of new energy power sources.
Industrial Production Parks
Manufacturing plants, chemical workshops, steel mills and mining sites requiring continuous, stable medium voltage power supply.
Commercial & Public Buildings
Hospitals, shopping malls, office towers, data centers and hotels that need space-saving, highly safe indoor power distribution equipment.
Transportation Infrastructure
Railway substations, metro systems, airports and port power supply supporting facilities.
Inherent Design Benefits
- Fully sealed gas compartments safeguard core live components against external erosion permanently
- Pre-assembled & factory-tested modules shorten on-site installation and commissioning time greatly
- Multi-layer mechanical interlocks completely prevent dangerous misoperation by maintenance staff
- Modular design balances small footprint and future expandability flexibly
- Strict raw material screening and production control guarantee steady long-term running performance
This 24kV medium voltage GIS switchgear is fully dimensionally interchangeable with Siemens original 8DJH series cabinets. If you want to browse our full lineup of interchangeable medium and high voltage power equipment tailored for Siemens systems, please visit our dedicated category page:
Siemens Compatible Medium & High Voltage Switchgear Range
Daily Operation Specifications
Only professionally trained electricians are allowed to perform switching operations:
- Confirm switch position and protection relay status before every operation
- Check mechanical indicator feedback after closing/opening actions
- Keep track of SF6 gas density readings regularly
- Never short-circuit or bypass safety interlock devices
- Log all abnormal running phenomena for periodic maintenance reference
Preventive Maintenance Guide
Though GIS cabinets require minimal upkeep, an annual comprehensive inspection is recommended to prolong service life:
- Mechanical Check: Verify operating mechanism flexibility, interlock validity and component wear
- Electrical Test: Measure insulation resistance, inspect secondary wiring and calibrate protection relays
- Gas System Inspection: Monitor gas density values, check for air leakage and test alarm locking functions
- Visual Audit: Check cabinet anti-corrosion condition, cable terminals and safety warning labels
Practical on-site experience shows most GIS system faults stem from non-standard installation, poor cable termination or neglected maintenance, rather than inherent product defects. Sticking to scheduled inspections can effectively avoid unplanned power outages.
Why Partner With XIZI Energy – Your Trusted Medium Voltage Switchgear Supplier
Experienced R&D & Production Team
Our team boasts more than 10 years of medium voltage GIS development experience. We fully understand the actual demands of overseas power projects, and tailor products to fit grid operating habits across Europe, the Middle East and Turkey.
Strict Full-Cycle Quality Control
Every switchgear undergoes complete factory tests including mechanical cycling, electrical performance check, interlock verification and dimensional calibration before shipment to guarantee stable field operation.
Flexible OEM & Customized Services
We customize panel layouts, busbar arrangements, relay configurations, nameplates and export technical documents to satisfy the personalized needs of global distributors and EPC contractors.
End-to-End Global Technical Support
We offer whole-project services: early scheme selection, drawing confirmation, on-site installation guidance, spare parts supply and after-sales troubleshooting anytime you need.
Important Compatibility Disclaimer
This 24kV GIS switchgear is an independent in-house product developed for projects requiring matching installation dimensions and connection interfaces of Siemens 8DJH cabinets.
Siemens is a registered trademark owned by Siemens AG. All mentions of the brand only serve to clarify installation compatibility, and do not represent any official partnership, authorization or endorsement between our two companies. Every component and structural design is independently researched, manufactured and tested by our factory.
FAQ
Q: Is this genuine Siemens original equipment?
A: No. This cabinet is fully designed and manufactured by XIZI Energy, developed exclusively as a physical size & interface compatible replacement for Siemens 8DJH units.
Q: Can this cabinet directly replace my existing 8DJH switchgear?
A: It matches the mainstream installation dimensions and wiring interfaces of 8DJH series. Our engineers can conduct a detailed compatibility evaluation once you share your project drawings.
Q: What’s the maximum rated working voltage?
A: The standard version supports up to 24kV medium voltage secondary distribution applications.
Q: Which sectors commonly adopt this switchgear?
A: Municipal power grids, new energy power stations, industrial plants, commercial complexes, airports, rail transit and mining projects worldwide.
Q: Does the product conform to IEC international standards?
A: Yes, the whole design, type test and production process strictly follow the IEC 62271 series standards for medium voltage switchgear.
Q: Do you accept OEM orders?
A: Absolutely. We provide complete OEM and project customized manufacturing services for overseas electrical distributors and EPC contractors.
Q: How often should maintenance be carried out?
A: Annual comprehensive inspection is advised to keep sealed GIS equipment running stably for decades.
Q: Can you supply full sets of technical documents?
A: Sure, we can provide dimension drawings, specification sheets, operation manuals and factory test reports upon request.
Request Free Technical Consultation
If you’re searching for a reliable 24kV gas insulated switchgear supplier, or a cost-effective compatible alternative to Siemens 8DJH for your secondary distribution project, reach out to our engineering team today.
We will craft tailored power distribution solutions, offer competitive factory direct pricing and deliver comprehensive global after-sales service for your medium voltage projects.
