Zhegui Electric builds four types of 11kV switchgear for international buyers: metal clad KYN28 withdrawable panels, gas insulated ring main units, metal enclosed XGN fixed panels, and air insulated HXGN RMUs. IEC 62271-200 type-tested, CE certified. 630A to 3150A, 25kA to 40kA short-circuit. Standard configs leave our 20,000 m² factory in 4 to 6 weeks. Exports to 50-plus countries.

Metal clad switchgear in the KYN28 series handles main incoming and feeder protection in indoor substations. Withdrawable vacuum circuit breakers rated 630A to 3150A, short-circuit withstand 25kA to 40kA. Form 3 or Form 4 busbar segregation keeps busbar, breaker trolley, and cable termination in separate compartments. Each breaker rolls out on guide rails for inspection. Silver-plated copper busbar. Full IEC 62271-200 type-test reports with every order.

A ring main unit compresses load break switching, transformer protection, and cable termination into a single stainless-steel tank sealed with SF6 gas. Installs outdoors on a pad. Three-position switches. Transformer protection via HV fuse or vacuum circuit breaker. Gas pressure gauge visible without opening. Rated for 30-year sealed lifespan. Deployed at transformer tap points in urban distribution, industrial parks, and wind farm collector networks.

Metal enclosed switchgear uses a fixed design — the circuit breaker bolts directly in. No withdrawable trolley. Simpler than metal clad, 20 to 30 percent lower cost per panel. Vacuum circuit breaker or load break switch options. Cable entry top or bottom. Rated 12kV, 630A to 1250A, 25kA short-circuit. Built for secondary distribution in factories, malls, and apartment complexes where the budget favors fixed installation.

HXGN delivers ring network switching and transformer protection with zero SF6 gas. Solid insulation barriers and vacuum interrupters in air. Same RMU topology as gas units — two incoming feeders, one or two transformer protection ways. Lighter than SF6. Opens with standard tools. The choice for EU markets, Australia, and LEED-certified projects where SF6 regulations limit gas RMU deployment.

Four types of 11kV switchgear, four different jobs. Metal clad switchgear with withdrawable VCB handles main substation incoming. Gas insulated ring main units sit outdoors in ring networks feeding transformers. Metal enclosed fixed-type panels keep costs down in smaller indoor substations. Air insulated RMUs do the ring network job without SF6 gas — the pick for EU markets and eco-certified projects. All four types are IEC 62271-200 type-tested, CE certified, and ship from one 20,000 square meter factory. Specify 12kV or 24kV rating. The breaker and short-circuit options stay the same: 630A to 3150A, 25kA to 40kA. Pick the type first, then the rating.

Metal clad KYN28 for main substations. Gas insulated RMU for outdoor ring networks. Metal enclosed XGN for smaller indoor sites. Air insulated HXGN for SF6-free installations. All IEC 62271-200 type-tested, CE certified. We supply electrical wholesalers, EPC contractors, utility companies, and government infrastructure projects across 50-plus countries.

Metal clad panels have three compartments: busbar, breaker trolley, and cable termination. RMUs seal everything in a welded stainless steel tank. Below we show the components that drive purchase decisions: cabinet frame construction, insulated busbar, withdrawable VCB mechanism, RMU load break switch, cable termination, and the mechanical interlock system that keeps operators safe.

We build 11kV switchgear to your specs. Custom voltage — 11kV, 12kV, 15kV, or 24kV. Your busbar layout, your color scheme, your logo on the nameplate. Multi-language documentation, region-specific compliance docs, NDA if needed. One project manager handles everything from design review to pre-shipment inspection. The image shows a standard installation — your order carries your branding instead.

Every panel we build is produced under an ISO 9001 certified quality management system. This means documented incoming inspection for copper busbar and enclosure steel, in-process torque verification at every bolted connection, and final routine testing logged against serial number. The ISO 9001 certificate is not a wall decoration — it means your panel was built with traceable materials, inspected at defined stages, and shipped with a factory test report that matches the serial number on the nameplate.

Every export order is configured for destination compliance. CE for Europe, SASO for Saudi Arabia, SNI for Indonesia, GOST for Russia. Need third-party type-testing at KEMA or ASTA? We arrange it. Test reports, material certs, and compliance declarations ship with the panels.

Zhegui Electric started in 2013 in Zhejiang, China. Today 200 people work out of a 20,000 m² factory, making over 500 switchgear units a month. We ship metal clad, RMU, metal enclosed, and air insulated switchgear to electrical wholesalers, EPC contractors, and utility companies in Africa, Southeast Asia, the Middle East, and South America.

KYN28 panels with withdrawable VCB handle main incoming protection in substations up to 3150A. Form 4 segregation keeps faults contained. Front and rear access, arc-proof design, digital metering with remote monitoring. Built for 24/7 operation in utility and heavy industry applications.

Gas or air insulated RMUs sit at every transformer tap in an underground ring network. Compact outdoor installation, front access only, three-position switch for ring open/close/earth. Cable fault isolates in under one second. No building, no HVAC, minimal footprint.

Send us your single-line diagram and project requirements. We will recommend the right switchgear type and get back to you with a technical proposal, compliance docs, and pricing within 48 hours. Standard KYN28 and RMU configs ship in 4 to 6 weeks. Factory visits welcome.

When you buy 11kV switchgear for an international project, you face four distinct product types. Metal clad switchgear sits in main substations. Gas insulated ring main units handle secondary distribution outdoors. Metal enclosed switchgear fits smaller indoor substations. Air insulated ring main units serve eco-conscious markets that restrict SF6. Each type has a clear role. Pick the wrong one and you waste money or fail a compliance check. This guide walks through all four so you know what to ask for.

Metal clad switchgear (KYN28): withdrawable VCB panels for main distribution

Metal clad switchgear is the main substation workhorse. KYN28 series from our factory uses withdrawable vacuum circuit breakers rated 630A to 3150A, with 25kA to 40kA short-circuit withstand. Three separate compartments per panel: busbar at the back, breaker trolley in the middle, cable connection at the front. That compartmentalized layout delivers Form 3 or Form 4 segregation as defined in IEC 62271-200. If a fault happens in one compartment, it stays there.

The withdrawable VCB trolley is why you pay more for metal clad. Roll out a breaker for inspection on guide rails without shutting down the busbar. The trolley has three mechanical positions: service, test, and disconnect. No guesswork. This matters in main substations and industrial plants where unplanned downtime costs more than the switchgear.

Gas insulated ring main unit (RMU): compact and sealed for ring networks

A gas insulated switchgear RMU is sealed and compact. Everything sits inside a welded stainless steel tank filled with SF6 gas. Load break switches handle the ring connections. A fuse or vacuum circuit breaker protects the transformer feeder. The whole unit installs outdoors on a concrete pad — no building, no HVAC, no fuss.

If you want to know what is ring main unit topology, picture a loop of underground cable with transformers tapped at intervals. The RMU sits at each tap point and can open or close the ring connection. Feed power from both directions — a cable fault on one side does not knock out the whole network. SF6 gas quenches arcs far faster than air, so the unit stays small. Three or four functions fit in a cabinet the size of a large suitcase. Sealed-for-life means no internal maintenance for 30 years.

A GIS switchgear RMU for 11kV/12kV/15kV systems handles ring switching and transformer protection in a single compact module. Ratings typically go 630A busbar with 20kA to 25kA short-circuit. Manual or motor-operated mechanisms available. Cable entry from below — plug-in terminations, no special tools.

Metal enclosed switchgear (XGN): fixed-type panels for smaller substations

Metal enclosed switchgear in the XGN series uses fixed-type breakers instead of the withdrawable trolley. No guide rails, no shutters, no rolling. The breaker bolts directly into the panel. That cuts manufacturing cost by 20 to 30 percent compared to KYN28 metal clad equivalents. For a small substation feeding two or three buildings or a factory floor, you probably do not need withdrawable breakers. The panels still meet IEC 62271-200 for internal arc and short-circuit withstand.

The metal clad vs metal enclosed choice is one of the most common questions we get from international buyers. Metal clad gives you withdrawable VCB access and full compartmentalization. Metal enclosed gives you reliable protection in a simpler, cheaper package. If the budget matters more than hot-swap convenience, XGN is the right answer. Both use vacuum circuit breakers or load break switches depending on the feeder requirement.

Air insulated ring main unit (HXGN): SF6-free RMU for eco-conscious markets

An solid insulated switchgear RMU or air insulated switchgear RMU like the HXGN series removes SF6 entirely. Instead of gas, it uses solid insulation barriers and vacuum interrupters in air as the dielectric. Same ring network switching functions, same transformer protection, zero global warming potential from the insulation medium.

Two reasons to pick air insulated over gas insulated. First, SF6 has a global warming potential 23,500 times worse than CO2. European and Australian regulators are tightening SF6 rules year by year. Second, several countries simply restrict SF6 equipment imports. An air insulated RMU bypasses all of that. Performance matches a gas insulated unit for 12kV/24kV secondary distribution — ring switching, fault isolation, transformer feeder protection. Rated 630A, 20kA/3s. The eco-compliance angle opens doors in EU tenders, sustainability-certified projects, and any grid operator tracking scope 3 emissions.

Comparing the four MV switchgear types side by side

Here is how metal clad, GIS RMU, metal enclosed, and air insulated RMU stack up. Use this table to match the switchgear type to your project need.

Feature	Metal Clad (KYN28)	Gas RMU	Metal Enclosed (XGN)	Air RMU (HXGN)
Breaker type	Withdrawable VCB	LBS + fuse/VCB	Fixed VCB or LBS	VCB in solid insulation
Installation	Indoor only	Outdoor/indoor	Indoor only	Outdoor/indoor
Insulation	Air insulated	SF6 gas	Air insulated	Solid + air
Network type	Radial main dist.	Ring secondary dist.	Radial secondary dist.	Ring secondary dist.
Maintenance	Front+rear access	Front access only	Front+rear preferred	Front access only
Best for	Main substations, industrial plants	Urban ring networks, outdoor sites	Small substations, budget projects	EU/Oz markets, eco-certified sites

The table gives you a quick reference. The real decision comes down to three questions: Do you need outdoor installation? Does withdrawable access matter to your maintenance team? Is SF6 an issue in your market? Answer those three and the type picks itself.

How to pick the right 11kV switchgear supplier

1. Check the type-test report — an IEC 62271-200 certificate from an accredited lab like KEMA or ASTA. If the supplier cannot produce it, the bid ends there.
2. Ask about production capacity and lead times. A 20,000 square meter factory with 200 staff should deliver standard 11kV switchgear in 4 to 6 weeks. Slower means supply chain problems.
3. Verify export experience. A supplier shipping to 50-plus countries has seen your market before. They handle compliance paperwork without panicking. Ask for project references in your region.
4. Inspect power distribution equipment compliance documentation. Market-specific certs — SASO for Saudi, SNI for Indonesia, GOST for Russia — should ship with the panels. Not three weeks later.
5. Confirm OEM and ODM capability. Your branding, custom voltage ratings from 11kV to 24kV, non-standard busbar layouts — all possible if the factory has in-house engineering. If they say standard only, move on.

15kV switchgear: when the voltage rating shifts

A note on 15kV switchgear ratings. North America and some Asian grids run at 15kV class instead of 12kV. Our metal clad and ring main unit designs rate to 12kV as standard, but we manufacture to 15kV and 24kV voltage classes on request. Same KYN28 metal clad platform, higher clearance distances, different test certificates. Just specify the voltage during inquiry. The busbar ratings and short-circuit withstand do not change — 630A to 3150A and 25kA to 40kA cover 15kV requirements easily.

Final thoughts on choosing MV switchgear

Four types. One manufacturer. Metal clad for main substations where withdrawable access and full segregation matter. Gas insulated RMU for compact outdoor ring networks. Metal enclosed for smaller indoor substations on a tighter budget. Air insulated RMU for markets that regulate SF6. All four meet IEC and IEEE standards relevant to the equipment class. All four ship from a single 20,000 square meter factory with CE certification and 50-plus country export experience. Send us your single-line diagram. We will recommend the type that fits and get you a technical proposal within 48 hours.