Three-phase AC panel with SPI - 1x 100kW inverter + 1x 50kW inverter (total 150kW) with CEI 0-16 interface

150 kW Three-Phase Photovoltaic AC Panel with SPI and CEI 0-21 Interface Device for 100 kW + 50 kW Inverters

The 150 kW three-phase photovoltaic AC panel with an interface protection system (SPI) and a device compliant with the CEI 0-21 standard is an electrical panel designed for the management, protection, and control of the alternating current side in photovoltaic systems connected to the low-voltage electricity distribution network.

The panel is configured to manage two three-phase photovoltaic inverters of 100 kW and 50 kW, for a total system power of 150 kW. It integrates electrical protection systems, line isolation, and control devices necessary to ensure the operational safety of the system and correct interaction with the electricity distribution network.

This AC panel for photovoltaic systems allows the safe connection of inverters to the grid, ensuring compliance with the technical requirements set by the CEI 0-21 standard for connecting power generation systems to the low-voltage electricity network.

Function of the AC Panel in Photovoltaic Systems

The AC electrical panel represents the connection point between the photovoltaic inverters and the electricity distribution network. Its function is to manage the alternating current side of the system, ensuring electrical protection, operational continuity, and protection coordination.

The interface protection system (SPI) constantly monitors the electrical grid parameters, such as:

• grid voltage
• frequency
• phase imbalance
• line stability conditions

In the event of anomalies or values outside the thresholds set by the standard, the protection system automatically disconnects the photovoltaic system from the electricity network.

In low-voltage connected photovoltaic systems, the AC panel also allows the correct management of the lines coming from the inverters and ensures the protection of electrical equipment and distribution circuits.

Main Features of the 150 kW Photovoltaic AC Panel

• Management of the alternating current side of two three-phase photovoltaic inverters of 100 kW and 50 kW
• Total photovoltaic system power up to 150 kW
• Interface protection system compliant with CEI 0-21
• Interface contactor with undervoltage coil
• Type 2 SPD surge arrester for overvoltage protection
• Dedicated miniature circuit breakers for inverter lines
• Residual current protection of electrical lines
• System status indication via front LED indicators
• Provision for SPI power supply via UPS
• ABS wall-mounted enclosure with IP65 protection rating

Applications of the Three-Phase Photovoltaic AC Panel

• Commercial and industrial photovoltaic systems with low-voltage connection
• Photovoltaic systems on industrial warehouses
• Photovoltaic systems with multiple three-phase inverters connected in parallel
• Renewable energy production systems
• Photovoltaic installations with power greater than 100 kW
• Systems with interface protection compliant with CEI 0-21

Components Included in the AC Electrical Panel

• 1 ABS wall-mounted enclosure with IP65 protection rating, dimensions 144 × 96 × 38 cm
• 1 4-pole 250A disconnect switch
• 1 4-pole 250A AC-3 230VAC contactor with undervoltage coil
• 1 CEI 0-21 compliant SPI interface protection system with a delay greater than 5 seconds
• 1 Type 2 3P+N 40kA 420VAC SPD surge arrester
• 2 3P+N C-curve miniature circuit breakers for inverter lines
• 2 4-pole 300mA Class A residual current blocks
• 2 NH fuse holders with fuses for line protection
• 1 16A 250VAC modular socket
• 1 1P+N 6A 30mA 10kA C-curve Type A residual current miniature circuit breaker
• 1 1P+N 16A 30mA 10kA C-curve Type A residual current miniature circuit breaker
• 1 toroidal current transformer, diameter 110 mm
• 2 modular residual current relays 0.025-25A, 110-400 VAC/DC power supply
• 3 230V modular LED indicators for system status indication