The AC Side Filter Board for ABB / Power-One Aurora TRIO 20.0 kW is an electronic module designed for EMI suppression and harmonic filtering on the AC output side of three-phase photovoltaic inverters.

Installed between the AC power stage and the electrical grid, this board ensures high-quality energy delivery by reducing high-frequency noise generated during DC/AC conversion. It plays a key role in maintaining grid compliance, electrical stability, and system protection.

The design integrates high-capacity toroidal inductors, film capacitors, and power relays, enabling both filtering and safe grid connection management.

⚙️ Main Functions

• EMI/RFI filtering on the AC output line
• Reduction of harmonics and high-frequency noise
• Stabilization of the AC waveform
• Support for grid compliance standards
• Filtered interface between inverter and grid

🔌 Role Inside the Inverter

Within the ABB Aurora TRIO inverter, this board:

• Filters the AC signal before grid injection
• Reduces switching noise from the inverter stage
• Protects both inverter electronics and the grid
• Works alongside synchronization and control systems
• Manages grid connection/disconnection via relays

👉 It is a critical output filter module for ensuring electrical quality and operational safety.

🔧 Technical Features

• Industrial high-current PCB design
• Dual-stage filtering architecture
• Large toroidal inductors (EMI chokes)
• AC-rated film capacitors for filtering
• Integrated power relays for line control
• High-current terminal connections
• Dedicated EMI suppression circuitry

⚠️ Typical Faults & Issues

This board may be involved in:

• Grid disturbance or EMC compliance errors
• Inverter protection trips
• Failure to connect to the grid
• Worn or stuck power relays
• Overheating of inductors or components

Possible effects:

• Unexpected inverter shutdowns
• Grid compliance faults
• Reduced system performance

🛠 Product Specifications

• Manufacturer: ABB / Power-One (Aurora)
• Compatibility: TRIO 20.0 kW
• Type: AC Side Filter Board / EMI Filter PCB
• Application: Three-phase photovoltaic inverters (grid-tie)

📊 Applications

• Repair and maintenance of ABB Aurora TRIO inverters
• Industrial photovoltaic systems
• Replacement of damaged AC filter boards
• Restoration of EMC compliance

💡 Key Advantages

• Improves power quality injected into the grid
• Reduces electromagnetic interference
• Protects inverter and electrical infrastructure
• Essential for regulatory compliance

📌 Summary

The ABB Aurora TRIO 20.0 kW AC Side Filter Board is a crucial module responsible for:

✔ AC signal filtering and harmonic suppression
✔ Ensuring EMC compliance and grid compatibility
✔ Protecting both inverter and electrical network