Miniature 4-Pole 100A PV Dual Power Automatic Transfer Switch (ATS)

Miniature Household Photovoltaic Power Transfer Switch (4P, 100A)

 Product Overview: Intelligent Switching for Uninterrupted Home Power

This Miniature Household Photovoltaic Power Transfer Switch is a compact, high-performance, 4-Pole Automatic/Manual Dual Power Transfer Switch (ATS) specifically engineered for modern homes and small commercial settings. It serves as a crucial “Power Manager” in environments integrating distributed photovoltaic (PV) generation, energy storage systems, and traditional grid power.

Rated at 100A and 230V AC, this device reliably and rapidly switches between two independent power sources, ensuring that critical household loads—such as refrigeration, lighting, and communication equipment—are immediately transferred to the backup source (e.g., PV inverter or battery storage) upon main power failure (e.g., utility grid loss). This capability enables uninterrupted energy management for your home.

Designed in strict accordance with the IEC/EN60947-6-1 international standard, the switch integrates advanced microprocessor control with an easy-to-operate manual mechanism, providing users with a safe, smart, and flexible home energy solution.

Core Features and Key Advantages

1. Compact and Dedicated PV System Design (Miniature & Dedicated)

• Optimized for Photovoltaic Systems: The solar and house icons on the panel explicitly indicate its role in PV self-consumption and energy storage backup systems, meeting the growing demand for green energy and emergency power at home.

• Miniaturized Structure: Utilizing a modular, compact design, it is significantly smaller than traditional industrial-grade ATS units. It is easily installed in standard household distribution boxes or small switch cabinets, saving valuable installation space.

• 4-Pole (4P) Configuration: The switch offers four-pole transfer (R, S, T, N), capable of simultaneously breaking and connecting all three phase lines and the neutral line. This ensures complete isolation between the source and the load, adhering to high electrical safety standards.

2. Highly Safe and Reliable Switching Mechanism (Safety & Reliability)

• Dual Power Input: Clear identification of “Main Power A” and “Main Power B” (Source I and Source II) simplifies the connection of the utility grid and the backup/PV power source.

• Automatic/Manual Dual-Mode Operation:

  • AUTO (Automatic Mode): Relies on the built-in intelligent controller to monitor voltage and frequency in real-time. Should the main power fail, it immediately initiates the automatic transfer sequence.

  • Manual Mode: The central green handle allows the user to manually switch to the Off (O) position or enforce a transfer to either source during maintenance or emergencies, providing the highest level of operator control and flexibility.

• High Insulation Performance: With a Rated Insulation Voltage of up to 690V, the device is ensured to maintain electrical isolation even when facing voltage fluctuations or transient overvoltages, enhancing durability and user safety.

3. Intelligent Control and Monitoring (Smart Control & Monitoring)

• Real-Time Status Indication:

  • POW-A and POW-B Indicators: Clearly display the supply status and availability of both Power Source A (MAIN) and Power Source B (STANDBY).

  • RUNNING STATUS LED Display: May integrate LEDs to show the current operating status (I/II ON, I/II Available, AUTO/MANUAL).

• Millisecond-Level Fast Response: Classified as a CB-type or PC-type device, its design goal is rapid transfer, minimizing the interruption time for sensitive electronics and protecting household appliances and electronic goods.

• Smart Voltage Threshold Detection: The intelligent controller can precisely monitor input voltage. It may be programmed to avoid unnecessary switching during momentary grid fluctuations by delaying the transfer or waiting for stable power recovery, preventing nuisance trips due to momentary under-voltage or over-voltage.

4. Exceptional Electrical Performance (Electrical Excellence)

• 100A Rated Current: Highly suitable for most large household or small commercial loads, including whole-house lighting, air conditioning, water heaters, and electric vehicle charging points.

• High Standards Compliance: Strict adherence to the IEC/EN60947-6-1 standard for Automatic Transfer Switches ensures that the product’s quality, performance, and safety meet international industrial-grade specifications.

• Thermal Endurance: The “Too class” rating (Thermal Class) implies that the temperature rise during operation at rated load is strictly controlled within safe limits, ensuring long-term operational reliability.

• High Mechanical/Electrical Life: Constructed with premium contact materials and a reliable driving mechanism, it ensures high repeatability and long life of the switching action, reducing maintenance frequency.

Typical Application Scenarios

This miniature ATS is ideally suited for the following residential and small commercial applications:

• Distributed PV and Energy Storage Systems: Automatically switches household loads to the PV inverter and battery storage when the utility grid fails, achieving energy self-sufficiency and emergency backup.

• Household Generator Backup: Automatically transfers the load from the utility grid to a small residential backup generator set.

• Critical Load Protection: Provides reliable backup power switching for home servers, smart home hubs, medical equipment, or electric vehicle charging infrastructure.

• Small Offices/Shops: Ensures continuous operation of lighting, POS systems, and data storage.

Technical Specification Summary

Safety and Installation Guarantee

Mechanical and Electrical Interlock

The device features built-in mechanical and electrical interlock mechanisms. This design ensures that the contactors of the two power sources can never be closed simultaneously, fundamentally eliminating the risk of a short circuit or parallel operation between the two supplies—one of the most critical safety features of any ATS.

Installation and Maintenance

The user-friendly terminal design clearly labels R, S, T, N, and the A and B power input points, enabling installers to complete the wiring quickly and accurately. Its modular structure also makes future maintenance, troubleshooting, and replacement exceptionally straightforward and safe.

By choosing this Miniature Household Photovoltaic Power Transfer Switch, you are selecting not just a power switching device, but a reliable commitment to smart energy management, safety, and the continuity of your home life.