Air-Insulated Medium Voltage Switchgears

Reliable protection with air‑insulated metal‑clad switchgear

Air‑insulated medium voltage switchgears are the cornerstone of modern medium‑voltage distribution. These assemblies use air as the primary insulating medium and a robust metal‑clad construction to provide safe, reliable operation across a wide range of industries. Each functional unit (such as a circuit breaker, busbar, and cable compartment) is enclosed within its own steel compartment, greatly reducing the risk of arc‑flash propagation and ensuring high levels of operator safety. High‑strength arc containment, coupled with interlocks and an internal arc classification (IAC) option, helps maintain service continuity during a fault. Compliance with IEC 62271‑200 and other international standards ensures that these air‑insulated panels meet strict performance and safety requirements.

Modular design and easy maintenance

Air‑insulated metal‑clad switchgear is designed to be modular. Withdrawable vacuum circuit‑breaker cassettes make routine maintenance and testing straightforward, while still providing reliable service continuity. The modularity allows new feeder panels to be added to an existing lineup without major revisions, supporting future expansion in industrial plants, substations or renewable energy projects. Front‑accessible compartments simplify installation and enable quick replacement of components, minimizing downtime. Longer lifecycles and lower maintenance requirements make these switchgears a cost‑effective choice for both new installations and retrofit projects.

Performance and flexibility for diverse applications

These panels handle rated voltages up to 36 kV and short‑circuit currents up to 40 kA for one second. They offer flexible busbar systems (single or double busbar) and both top and bottom cable entry, making them suitable for a range of applications—from utility substations, industrial facilities, data centers and infrastructure projects to transportation systems and renewable‑energy plants. Air‑insulated switchgear is particularly advantageous in indoor environments where compact dimensions, low noise levels and environmental friendliness (no SF₆ gas) are important. Integrated sensors and communication interfaces allow the switchgear to be monitored remotely via SCADA or energy management systems, enabling predictive maintenance and real‑time control.

Sustainable, environmentally friendly solution

With increasing focus on green technologies, air‑insulated switchgear offers an environmentally friendly alternative to SF₆‑filled gas‑insulated systems. There is no need for greenhouse‑gas handling or disposal, and the components are generally easy to recycle. By combining high safety, reliability, modularity and sustainability, air‑insulated metal‑clad switchgear provides a future‑proof platform for medium‑voltage power distribution across utilities, industrial facilities and commercial buildings.