Explore our top-tier medium-voltage (MV) panels and ring main units engineered for reliable power grid integration, solar farms, wind power substations, and demanding industrial networks.
The MV and HV electrical infrastructure markets are changing rapidly. Understanding technical developments and environmental factors is essential for strategic asset managers and global procurement teams.
Stricter global F-gas regulations are pushing utilities away from Sulfur Hexafluoride (SF6). Modern Air-Insulated Switchgear utilizing pressurized dry air, nitrogen, or alternative gas blends provides a zero-GWP (Global Warming Potential) footprint while matching the dielectric performance of traditional systems.
Today's AIS units integrate IoT sensors, optical thermal monitors, and smart current/voltage transformers (LPCT/LPUT). These components enable real-time health checks, predictive maintenance, and seamless communication via the IEC 61850 protocol to reduce grid downtime.
Industrial electrification requires switchgear configurations with small footprints that can handle high currents. Deploying metal-clad switchgear with integrated drawout VCBs (Vacuum Circuit Breakers) provides high breaking capacities (up to 40kA) while keeping installation footprints compact.
Zhejiang Zeno Electric Co., Ltd. is a national high-tech enterprise located in Ningbo, with a registered capital of 52 million yuan. The company integrates research and development (R&D), manufacturing, sales, and service of advanced power equipment and energy systems.
Rooted in Ningbo and supported by a strong engineering and technical team, Zeno Electric has steadily expanded its business across China and international markets. Through continuous innovation and quality-driven development, the company has become a trusted provider in the power and energy industry, with growing influence in both utility and industrial sectors.
With a focus on sustainable development and smart energy transformation, we are committed to delivering safe, efficient, and intelligent power solutions that support the global transition toward cleaner and more digitalized energy systems.
Zhejiang Zeno Electric Co., Ltd. specializes in power equipment and integrated energy system solutions. Our product portfolio covers a wide range of advanced technologies, including:
In addition, we undertake turnkey power engineering projects up to 220kV, providing end-to-end services that include system planning, engineering design, equipment manufacturing, installation, commissioning, and long-term maintenance.
To better serve diverse customer needs, we offer fully customized, one-to-one energy solutions tailored to specific project requirements. Our integrated service model helps clients:
Our Ningbo manufacturing facility uses automated machinery and strict testing protocols to ensure every switchgear cabinet meets high standards of reliability.
For procurement managers, utility consultants, and engineering teams, selecting an AIS supplier involves balancing technical performance with compliance and custom configurations.
Our switchgear is built in accordance with IEC 62271-200 standards. Whether your project requires LSC2B-PM metal-clad segregation for maximum service continuity or LSC2A-PI architectures for general sub-stations, our panels feature insulated busbars and internal arc classification (IAC AFLR) to protect operating personnel in the event of an internal fault.
Standard installations often struggle with humidity, high dust levels, and extreme ambient temperatures (ranging from -25°C to +40°C). By applying anti-condensation heaters, high-grade anti-corrosive powder coatings, and IP4X/IP54 ingress protection seals, our AIS panels run reliably in coastal regions, desert projects, and cold environments alike.
Fully customized configurations for 7.2kV, 12kV, 24kV, 33kV, and up to 40.5kV systems operating at 50Hz or 60Hz.
Choose from vacuum circuit breakers (VCB) with mechanical or magnetic actuators, SF6 load break switches (LBS), or eco-friendly gas alternatives.
Classified under LSC2B (Loss of Service Continuity) with earthed metal shutters and separate cable/busbar/instrument compartments.
Pre-wired for RTU, numerical relays, power quality meters, SCADA networks, and remote control operation.
As a forward-looking manufacturer, Zeno Electric works to balance technical reliability with environmental sustainability in modern electrical grids.
Our dry air and nitrogen insulated switchgears offer a sustainable alternative to SF6 gas. These green units operate with a lower global warming potential while maintaining the dielectric performance and compact footprint required for modern urban grids.
By embedding fiber-optic temperature sensors at cable connection points and monitoring busbars for partial discharge (PD), our switchgear provides operators with actionable health updates. This shift from reactive to predictive maintenance helps reduce downtime.
Our designs feature intelligent electronic devices (IEDs) that support the IEC 61850 protocol. This enables quick communication between adjacent panels, ring main units, and centralized control systems, improving fault location and network recovery.
Find answers to common technical, commercial, and operational questions regarding medium-voltage air-insulated switchgear.
Air-Insulated Switchgear (AIS) uses atmospheric air as the primary insulation medium between live conductors and ground. Gas-Insulated Switchgear (GIS) utilizes pressurized SF6 or alternative eco-gases, allowing for more compact phase-to-phase clearances. While GIS has a smaller footprint, AIS offers lower initial capital costs, easier access for routine maintenance without specialized gas handling tools, and simpler end-of-life recycling processes.
Our switchgear is designed and type-tested in compliance with IEC 62271-200 (rules for AC metal-enclosed switchgear and controlgear for voltages above 1 kV and up to 52 kV). The internal circuit breakers meet IEC 62271-100, while the switch-disconnectors comply with IEC 62271-102, ensuring electrical and mechanical reliability under high-load conditions.
Yes. Zhejiang Zeno Electric Co., Ltd. manufactures eco-friendly products like the *24kV Dry Air Insulated Ring Main Unit (SF6-Free AIS RMU)*. These systems use pressurized dry air or nitrogen insulation, which helps reduce greenhouse gas emissions while maintaining physical size and safety profiles comparable to standard systems.
Global procurement teams can customize parameters including: rated voltage (12kV, 24kV, 36kV, 40.5kV), rated busbar current (630A up to 3150A), short-time withstand current (e.g., 20kA/25kA/31.5kA for 3s/4s), internal arc classification (IAC AFLR values), protection relay brands, manual/motorized control mechanism voltages, and specific ingress protection (IP) ratings for outdoor structures.
We provide full engineering support, including detailed schematics, Foundation Installation Drawings, and connection guides. For international projects, we offer comprehensive remote technical commissioning support, on-site supervision via partner engineers, and detailed training packages for local utility teams to ensure a smooth integration into the local grid.
Examine additional configurations, from drawable metal-clad cabinets to compact ring main units, designed to keep your power infrastructure running reliably.
Zeno Electric
