AC 33 kW panel (single inverter) with CEI 0-21 interface
AC 33 kW panel (single inverter) with CEI 0-21 interface
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33 kW Three-Phase Photovoltaic AC Panel with SPI and CEI 0-21 Interface Device for Single Inverter
The 33 kW three-phase photovoltaic AC panel with an interface protection system (SPI) and a CEI 0-21 compliant interface device is an electrical panel designed for the management, protection, and control of the alternating current (AC) side in residential, commercial, and professional photovoltaic systems connected to the low-voltage distribution grid.
The electrical panel is configured to manage a 33 kW three-phase photovoltaic inverter, for a total system power of 33 kW. It integrates electrical protection, isolation, and grid interface systems designed to ensure proper coordination between the inverter, distribution lines, and the electrical grid according to Italian technical regulations for the connection of power generation systems.
This AC panel for photovoltaic systems allows the safe connection of the inverter to the electrical grid, ensuring compliance with the technical requirements set out by the CEI 0-21 regulations for the connection of power generation systems to the low-voltage distribution grid.
Function of the AC Panel in Photovoltaic Systems
The photovoltaic AC electrical panel represents the interface point between the photovoltaic inverter and the electrical grid. Its main function is to manage the alternating current side of the system, ensuring electrical safety, operational continuity, and component protection.
The interface protection system (SPI) constantly monitors electrical grid parameters such as:
- grid voltage
- frequency
- phase imbalances
- line operating conditions
In the event of anomalies or conditions that do not comply with the limits set by the regulations, the system automatically intervenes by disconnecting the photovoltaic system from the grid to prevent damage to the components and ensure the safety of the electrical system.
In photovoltaic systems, the AC panel also allows the coordination of electrical protections between the inverter, power line, and grid, contributing to system stability and the correct management of the delivery point.
The presence of components dedicated to overvoltage protection and automatic line isolation improves the operational reliability of the photovoltaic system and simplifies installation and maintenance operations.
Main Features of the 33 kW Photovoltaic AC Panel
- AC side management of a 33 kW three-phase photovoltaic inverter
- Total photovoltaic system power up to 33 kW
- SPI interface protection system compliant with CEI 0-21 regulations
- Interface device for connection to the low-voltage electrical distribution grid
- Type 2 SPD + CT for protection against atmospheric and switching overvoltages
- Magnetic-thermal and residual current protection for electrical lines
- Modular contactor for automatic line isolation
- Wall-mounted ABS enclosure with IP65 protection rating
- Accessories included for cable connection and wall mounting
- Technical documentation with electrical diagram and connection instructions
Applications of the Three-Phase Photovoltaic AC Panel
- Three-phase photovoltaic systems with a single 33 kW inverter
- Low-voltage commercial and professional photovoltaic systems
- Photovoltaic installations on production buildings and craft facilities
- Photovoltaic systems with grid connection according to CEI 0-21
- Renewable energy electricity generation systems
- Installations in indoor and outdoor technical environments thanks to the IP65 protection
- AC panels for systems requiring dedicated interface protection
Components Included in the AC Electrical Panel
- 1 wall-mounted ABS enclosure IP65, 54 modules, dimensions 42 × 59 × 15 cm
- 2 4-pole 63A C curve 10kA magnetic-thermal circuit breakers
- 1 stackable 4-pole 50/63A 300mA Type A residual current block
- 1 230/400 Vac current-release disconnect switch
- 1 Type 2 modular SPD + CT 40kA 3P+N 420 Vac 2 modules
- 1 100A 4NO 230 Vac modular contactor
- 1 1P+N 10A 30mA 4.5kA C curve Type A residual current magnetic-thermal circuit breaker
- 4 IP68 cable glands diameter 4-8 mm
- 4 IP68 cable glands diameter 13-18 mm
- 1 ground and neutral bar with screws
- 1 CEI 0-21 interface device with a delay greater than 5 seconds
Technical Specifications of the Photovoltaic AC Panel
| Panel Type | Three-phase photovoltaic AC electrical panel with SPI interface protection |
|---|---|
| Inverter Configuration | 1 33 kW three-phase inverter |
| Rated System Power | 33 kW |
| Connection Regulation | CEI 0-21 |
| Overvoltage Protection | Type 2 SPD + CT 40kA |
| Enclosure Protection Rating | IP65 |
| Panel Dimensions | 42 × 59 × 15 cm |
| Installation | Wall-mounted, for indoor or outdoor technical environments |
Installation of the AC Electrical Panel for Photovoltaic Systems
The AC electrical panel is designed for wall-mounted installation in technical rooms, service areas, light industrial environments, and protected outdoor areas dedicated to the management of photovoltaic systems.
The ABS enclosure with an IP65 protection rating ensures effective protection of the electrical components against dust, moisture, and external agents, ensuring operational reliability even in demanding installation conditions.
The panel is supplied with accessories for mounting and cable connection, as well as reference paper documentation such as an electrical diagram and visual instructions for performing a correct connection.
The sizing and configuration of the panel must be verified by the photovoltaic system designer or a qualified electrical installer based on the system power, the grid characteristics, and the requirements of the distribution grid operator.
Frequently Asked Questions about the Photovoltaic AC Panel
What is the SPI system in photovoltaic systems
The interface protection system (SPI) is a safety device that constantly monitors electrical grid parameters such as voltage and frequency and automatically disconnects the photovoltaic system in the event of anomalies or conditions that do not comply with the limits set by the regulations.
For which systems is this AC panel designed
The AC panel is designed for three-phase photovoltaic systems with a single 33 kW inverter connected to the low-voltage electrical distribution grid according to CEI 0-21.
What does the CEI 0-21 regulation establish
The CEI 0-21 regulation defines the technical rules for the connection of electricity generation systems to the low-voltage distribution grid, establishing the safety, protection, and management requirements for the interface between the system and the grid.
Related Search Terms
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Important notes: Shipping and order handling costs are not included and will be communicated later during the quoting phase. These costs are due regardless of the chosen delivery method, including pickup at the premises.
Product prices may vary depending on availability and supplier terms at the time of the quote request. Images are for illustrative purposes only and may not accurately reflect the actual product; descriptions may contain errors. We recommend always checking the manufacturer's technical data sheet.
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