Sealed Stainless Steel Enclosure — Fully Maintenance-Free
All primary live components and switching devices are sealed inside a stainless steel gas tank at the factory. Once closed and pressurised, the tank interior is isolated from external air, dust, humidity and pollution, so the assembly delivers true maintenance-free operation: no routine cabinet cleaning, no internal insulation inspection, no annual dry-out. Annual gas leakage rate is verified at ≤0.01% per year and the tank protection class is IP67 — this is a switchgear installation designed to sit inside an indoor substation for its full service life without gas top-up.
High-Current Capacity (Up to 3150A) and High Breaking Capacity (Up to 40kA)
Rated current is available at six standard levels — 630, 1250, 1600, 2000, 2500 and 3150 A — matching everything from a modest incomer up to a large distribution main. Short-circuit breaking capacity is available at three levels: 25, 31.5 and 40 kA. Short-time withstand and peak withstand track the breaking rating (25/31.5/40 kA short-time and 63/80/100 kA peak). This makes the assembly suitable both for standard incomers and for grid-connection points where fault current levels are high.
New-Generation Redesign of Interlocking, Arc Resistance and Seismic Behaviour
The switchgear is a new-generation digital medium voltage switchgear, with mechanical interlocking, internal arc resistance and seismic behaviour redesigned as a package rather than added on top of a legacy platform. Simplified operator ergonomics reduce the mis-operation surface area at the cabinet, and the redesigned pressure-relief pathway supports internal arc classification up to AFLR 40kA/1s — well beyond the entry-level 25kA rating typical of first-generation gas-insulated switchgear.
Digital Sensing Layer — Temperature, Mechanical Characteristics, Position
The assembly is instrumented as a digital medium voltage switchgear from the design stage. Sensor packages measure cabinet internal temperature, circuit breaker mechanical characteristics (travel curve, coil current, timing) and switch position (isolation, service, earthed). Data is not just displayed on a local HMI — it is collected, timestamped and stored so the operations team can review trends, identify drift in a breaker's timing signature, and act on early indicators before a mechanical failure develops.
IoT Architecture: System Application, Communication, Edge, Endpoint Devices
The digital layer follows a distribution IoT architecture: system application at the top, communication management in the middle, edge computing at the substation gateway, and electrical endpoint devices at the cabinet. This four-tier structure means substation-level analytics run at the edge — a rise in breaker mechanical timing, a shift in temperature signature, a partial-discharge event — while only the summarised events and alarms flow up to the central monitoring platform. Bandwidth-limited or intermittent-uplink sites still get the full analytical benefit.
Digital Substation Applications: Power Monitoring, Asset O&M, Energy Management
The endpoint data feeds three application layers. Power monitoring reads sources, distribution equipment and load feeders in real time, keeping the local system in safe operating envelope. Asset O&M supplies each equipment item with a digital nameplate, fault diagnosis, predictive maintenance schedule and remote expert guidance — reducing dependence on scarce on-site expertise. Energy management collects data across multiple energy carriers, runs multi-energy coordinated control, and drives the site toward the operator's energy efficiency and dual-carbon targets.
Fully-Insulated Solid Extension Busbar
Extension busbars use fully-insulated, screened solid busbar construction: every conductive surface is covered by a bonded insulation layer with an outer earthed screen. Line-ups can be extended without exposing live metal even when a cabinet is opened for connection work, so commissioning of an extended line-up is done safely in cramped indoor substation spaces where the operator is close to the equipment.
