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? The RMU cabinet is designed with two completely isolated metal compartments: the busbar compartment and the switch compartment. No additional isolation panels are required, facilitating safe maintenance and fuse replacement. The busbar compartment is fully enclosed with metal, and busbars are connected through wall bushings. As required, a fully isolated instrument compartment may be installed in front of the busbar compartment for dedicated secondary equipment. The switch compartment primarily houses primary equipment and cable connections. Its door is mechanically interlocked with the switch to achieve five-position interlocking, ensuring simplicity and reliability. The door features an observation window for inspecting isolation breaks and monitoring operational status；

? This high-voltage load switch cabinet comprises a cable compartment, busbar compartment, and instrument compartment. The front door incorporates a locking mechanism that permits opening only after disconnecting high-voltage power and closing the earthing switch. It provides reliable five-position interlocking functionality.