Explore our state-of-the-art Medium and High Voltage GIS solutions designed to guarantee grid safety and efficiency.
A Pioneer in Intelligent Power Grid Distribution and Advanced High-Voltage Solutions
Zhejiang Zeno Electric Co., Ltd. is a national high-tech enterprise located in Ningbo, China, with a registered capital of 52 million yuan. The company fully integrates research and development (R&D), advanced manufacturing, sales, and localized lifecycle service of power distribution equipment, smart energy systems, and high-voltage substation structures.
"Our engineering DNA is centered around safety, environmental protection, and micro-grid adaptability. Through specialized material design and digital twins, we are redefining reliability in medium and high-voltage Gas-Insulated Switchgear (GIS) environments."
Rooted in Ningbo and supported by a strong, multidisciplinary engineering and technical team, Zeno Electric has steadily expanded its footprint across China, Southeast Asia, the Middle East, South America, and European markets. Through continuous innovation, material optimization, and quality-driven manufacturing, the company has become a trusted partner in the electrical power and energy sector, with growing influence in both public utility systems and heavy industrial networks.
With a core focus on sustainable development and smart grid transformation, we are committed to delivering safe, space-saving, and intelligent power solutions. Our systems actively support the global transition toward cleaner energy generation, higher electrification rates, and digitalized energy management.
End-to-End High-Performance Systems and Turnkey Engineering
At Zhejiang Zeno Electric Co., Ltd., we specialize in high-voltage engineering, medium-voltage power distribution, and integrated energy solutions. Our structural scope covers everything from individual gas insulation panels up to extensive 220kV turnkey substation designs. Our core product portfolio includes:
Highly customized high and low voltage power distribution equipment designed for extreme environments, ensuring minimal thermal wear and maximum arc containment.
Compact, skid-mounted wind power and photovoltaic substations featuring high structural stability and immediate plug-and-play installation in remote areas.
Both SF6 and solid-insulated eco-RMUs designed for compact municipal distribution grids, smart cities, and reliable commercial building distribution.
Integrated, containerized lithium battery energy storage systems equipped with liquid cooling and intelligent fire suppression systems.
Fast-charging, ultra-fast charging stations and charging hub infrastructure fully integrated with local micro-grid systems.
Cloud-based SCADA and Energy Management Systems (EMS) that analyze real-time load distribution, partial discharge, and ambient gas conditions.
In addition, Zeno Electric undertakes turnkey power engineering projects up to 220kV. We provide end-to-end services, which include system planning, mechanical and electrical engineering design, specialized equipment manufacturing, on-site installation, commissioning, and long-term diagnostic maintenance. By leveraging our integrated service model, global clients can:
Adapting to Zero-Carbon Mandates and Intelligent Grid Topologies
The global switchgear industry is facing its most critical transformation since the introduction of SF6 gas insulation. As regulations around greenhouse gases tighten globally, the demand for green, low-carbon, and smart Gas-Insulated Switchgear is rising rapidly. Zeno Electric is at the forefront of this green energy transition, pursuing a dual roadmap of environmental optimization and digital grid integration.
For decades, Sulfur Hexafluoride (SF6) has been the industry standard for high-voltage insulation due to its excellent dielectric properties and arc-quenching capability. However, given its high Global Warming Potential (GWP), our R&D department has invested in alternative gas solutions. We are currently implementing three distinct routes:
Tomorrow's substation demands proactive maintenance rather than reactive repair. Zeno Electric's smart GIS incorporates built-in optical fiber temperature sensors, ultra-high-frequency (UHF) partial discharge sensors, and continuous gas density sensors. Using digital twin platforms, operators can visualize the internal mechanical stresses and gas composition in real time, preventing insulation breakdown before it occurs.
Customized Electrical Architecture for Global Applications
Remote renewable installations encounter harsh temperatures, saline air, and highly volatile load cycles. Our prefabricated compact GIS substations are hermetically sealed, protecting critical components from dust, sand, and moisture. The compact design allows for direct installation inside wind turbine towers or small outdoor enclosures, minimizing cabling costs.
Railway electrification demands switchgear that can withstand continuous mechanical vibrations and rapid transient voltage spikes. Zeno Electric's specialized Model Xgn55-27.5kV GIS is specifically built for heavy-haul railways and high-speed transit networks, guaranteeing stable power distribution under extreme operational loads.
Chemical processing plants, smelters, and mining sites are characterized by corrosive atmospheric pollutants and high explosive risks. Our metal-clad GIS units seal all active primary components inside stainless steel gas compartments. This design completely eliminates risks associated with environmental contamination, dust build-up, and accidental contact.
Inside Zeno Electric's Precision Production and Testing Hub in Ningbo
Our manufacturing complex in Ningbo utilizes advanced industrial robotics, digital lean management, and comprehensive raw-material tracking to ensure consistent production quality. By optimizing every phase of fabrication, we maintain shorter lead times and higher mechanical tolerances than the industry average. Below are the key stages of our manufacturing process:
Adhering to Strict Global Engineering Standards
Deploying high-voltage infrastructure requires total alignment with localized utility standards and international regulatory frameworks. Every single GIS unit shipped from Zeno Electric's plant undergoes rigorous routine testing in accordance with IEC 62271-203 (for high-voltage gas-insulated switchgear) and IEC 62271-200 (for medium-voltage metal-enclosed switchgear).
| Standard Ref. | Applicability Domain | Test Parameters Checked | Global Equivalents |
|---|---|---|---|
| IEC 62271-200 | Medium-Voltage GIS (up to 52kV) | Internal arc classification, dielectric withstand, busbar short-circuit. | GB/T 3906, IEEE C37.20.2 |
| IEC 62271-203 | High-Voltage GIS (52kV and above) | Partial discharge measurement, gas leak detection, power frequency withstand. | GB/T 7674, IEEE C37.122 |
| IEC 62271-1 | Common Specifications for HV Switchgear | Temperature rise limits, seismic testing, auxiliary circuit insulation. | IEEE C37.100.1 |
To assist international EPC contractors and public utilities, Zeno Electric maintains a dedicated global service network. We provide comprehensive technical support, including:
Evaluating Footprint, Maintenance Frequency, and Lifecycle Performance
When engineering modern substation projects, choosing between Air-Insulated Switchgear (AIS) and Gas-Insulated Switchgear (GIS) significantly affects capital and operational expenditures over the project's lifecycle. While GIS requires a higher initial capital investment, it offers a substantially lower Total Cost of Ownership (TCO) under many operating conditions.
Footprint Optimization: Due to the high dielectric strength of SF6 or alternative gases, the distance between active conductor components in a GIS is a fraction of that in an AIS. This compact layout allows for footprint reductions of up to 70% to 90%, which is critical in urban centers, underground installations, offshore wind platforms, and industrial facilities with high land costs.
Maintenance and Reliability: AIS installations are constantly exposed to atmospheric conditions, dust, saline moisture, and animal intrusion, requiring regular inspection, cleaning, and breaker lubrication. In contrast, the primary components of a GIS are enclosed within a sealed gas compartment, isolated from external influences. This design reduces routine maintenance intervals from months to decades, minimizing operational costs and preventing accidental contact risks.
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Medium and High Voltage Gas-Insulated Switchboard Components & Testing Equipment
Zeno Electric
