AC Incoming Panel and AC Distribution Panel with Dual Power Auto Transfer

Tonhe Electronics AC Incoming Panels and AC Feeder Panels are core low-voltage distribution equipment in power distribution systems, specifically designed for power plants, substations, data centers, and industrial facilities. Serving as the critical hub for energy distribution, these two cabinet types jointly form a stable and reliable AC power network. The AC Incoming Panel is responsible for introducing dual or multiple AC power sources from the grid, performing metering, protection, and switching to ensure continuous power input. The AC Feeder Panel precisely distributes energy from the busbar to various load circuits (such as DC charging panels, lighting, HVAC, maintenance power, etc.), providing comprehensive branch protection and monitoring. Designed with modularity and equipped with intelligent monitoring systems, both units deliver "zero-interruption" AC power assurance for critical infrastructure.

The AC Incoming Panel (also known as the Receiving Cabinet) serves as the "gateway" of the distribution system. Its primary function is to receive electrical energy from the external grid (typically AC 380V/220V) and introduce it into the cabinet busbar via the main circuit breaker. It integrates an Automatic Transfer Switch (ATS) for dual power sources, lightning surge protection, voltage/current metering, and main circuit protection. In the event of a main power failure, the incoming panel can automatically or manually switch to the backup power source rapidly, ensuring continuous supply and acting as the first line of defense for the safe operation of the entire distribution system.

• Dual Power Auto Transfer (ATS): Supports Mains/Mains or Mains/Generator inputs with switching time <100ms (faster options available), ensuring uninterrupted load power.
• Comprehensive Main Circuit Protection: Equipped with high-breaking capacity Molded Case Circuit Breakers (MCCB) featuring overload, short-circuit, under-voltage, and ground fault protection.
• Intelligent Metering & Monitoring: Built-in multi-function power meters display real-time three-phase voltage, current, power, frequency, and energy data, supporting remote communication.
• Lightning & Surge Suppression: Class I/II lightning protection modules effectively resist lightning overvoltage and grid switching overvoltage, protecting downstream equipment.

The AC Feeder Panel (also known as the Distribution Cabinet or Outgoing Cabinet) acts as the "distribution center" of the power system. It draws energy from the Incoming Panel or Bus Tie Panel and distributes it to specific electrical equipment via multiple branch circuit breakers. In substation scenarios, it primarily supplies AC power to DC charging panels, emergency lighting, heating/dehumidification devices, maintenance sockets, and HVAC systems. The feeder panel features refined branch monitoring and protection capabilities, ensuring that a fault in a single circuit does not affect others, thereby achieving effective fault isolation.

• Flexible Multi-Circuit Configuration: Supports up to dozens of output circuits with selectable breaker types (MCB/MCCB) to meet diverse load requirements.
• Branch Intelligent Monitoring: Optional branch inspection modules allow real-time monitoring of current, switch status, and leakage for each outgoing circuit, providing early warning of potential risks.
• Clear Labeling & Layout: Each circuit is equipped with clear labels, indicator lights, and operating handles, facilitating quick identification and operation by maintenance personnel.
• High-Reliability Isolation: Excellent electrical isolation between branches prevents fault propagation, ensuring continuous power to non-faulty circuits.

• Material Standard: Cabinets are constructed from high-quality cold-rolled steel (thickness ≥2.0mm), treated with pickling, phosphating, and electrostatic powder coating. The uniform surface coating offers strong anti-corrosion and rust resistance, typically in RAL7035 (Computer Gray).
• Structural Design: Features a fully assembled structure with high frame strength and excellent seismic performance. Front-rear door access (or single-side maintenance) provides spacious internal space for easy cable routing and maintenance.
• Internal Layout: Strictly adheres to the separation of strong and weak currents. AC busbars use high-conductivity T2 copper bars with tin or silver plating at connections to reduce contact resistance and minimize temperature rise.
• Thermal Design: Equipped with temperature-controlled fans or natural ventilation louvers at the top to ensure long-term stable operation of components within suitable temperatures.
• Safety: All live parts are protected by insulation barriers. Doors are fitted with mechanical interlock devices to prevent misoperation and ensure personnel safety.

• Power Systems Substation Auxiliary Power, Power Plant House Power Provides reliable AC source for DC panels & protection devices.
• Rail Transit Metro Station Distribution, Railway Signal Rooms Vibration-resistant, fire-retardant design.
• Industrial Factory Control Rooms, Production Line Aux Power Dust/corrosion resistant, long-life operation.

Tonhe Electronics AC Incoming & AC Distribution Panel are designed, manufactured, and tested in strict compliance with the latest International Electrotechnical Commission (IEC) standards. This ensures global compatibility, safety, and reliability, meeting rigorous entry requirements for markets in Europe, America, and countries along the "Belt and Road" initiative.