Photovoltaic Tied Grid Cabinet
✅Safe & Reliable: Multiple protections (overvoltage, undervoltage, islanding, short-circuit,etc.).
✅Smart Monitoring:Supports remote data collection and fault alarms.
✅Modular Design:Expandable (adding metering or communication modules).
✅High Compatibility:Compatible with various inverters.
- Product Introduction
The Photovoltaic tied Grid Cabinet (PV Grid-Connected Cabinet) is a core power distribution device in photovoltaic (PV) power generation systems. It safely and reliably connects PV inverters to the grid, enabling the feed-in of electricity.
The Photovoltaic tied Grid Cabinet acts as a "bridge" between the PV power station and the grid, with the following key functions:
● Grid Connection Control: Manages the connection and disconnection of the PV system and the grid.
● Protection Functions: Prevents overvoltage, undervoltage, overfrequency, underfrequency, islanding, and other abnormal conditions.
● Energy Metering (Optional): Records PV power generation, grid feed-in, and user consumption.
● Remote Monitoring (Optional): Supports data collection, fault alarms, and remote control.
It is suitable for residential distributed PV systems, commercial & industrial PV systems, and large-scale ground-mounted power plants.
Components
The Photovoltaic tied Grid Cabinet mainly consists of the following components:
| Component | Function Description |
|---|---|
| Input Side (DC/AC) | Connects to the inverter output, typically equipped with AC circuit breakers or isolators. |
| Output Side (Grid) | Connects to the grid, equipped with grid-connected circuit breakers (with protection). |
| Protection Devices | - Overvoltage/Undervoltage Protection (monitors grid voltage) - Overfrequency/Underfrequency Protection (monitors grid frequency) - Anti-Islanding Protection (disconnects automatically during grid failure) - Short-Circuit Protection (circuit breaker or fuse) - Lightning Protection (Surge Protective Device, SPD) |
| Metering Unit | Optional smart meter for bidirectional metering (generation & feed-in). |
| Control & Communication | - Local control (buttons, indicators) - Remote communication (RS485, 4G, WiFi, etc., compatible with SCADA systems). |
| Auxiliary Equipment | Current/voltage meters, indicator lights, grounding terminals, etc. |
Technical Parameters
Key technical parameters of the Photovoltaic tied Grid Cabinet:
| Parameter Category | Typical Range |
|---|---|
| Rated Voltage | 230V (single-phase), 400V (three-phase), 10kV/35kV (medium voltage grid connection) |
| Rated Current | 32A, 63A, 100A, 250A, 630A (selected based on system capacity) |
| Protection Level | IP65 (outdoor), IP20 (indoor) |
| Operating Frequency | 50Hz/60Hz |
| Communication Interface | RS485, Modbus, WiFi, 4G (optional) |
| Metering Accuracy | Class 1 or 0.5S (for energy meters) |
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Operating Environment
The PV grid-connected cabinet is suitable for various environments but must meet the following conditions:
| Environmental Factor | Requirements |
|---|---|
| Ambient Temperature | -25°C ~ +60°C (outdoor models must withstand extreme heat and cold). |
| Humidity | ≤95% (non-condensing). |
| Altitude | ≤2000m (derating required for higher altitudes). |
| Installation Location | Well-ventilated, avoiding direct sunlight (outdoor models require rain & corrosion resistance). |
| EMC Compliance | Meets EN 61000-6-2 (industrial electromagnetic interference standards). |
Applications
PV grid-connected cabinets are widely used in various PV power generation scenarios:
| Application | Use Case |
|---|---|
| Residential PV | Rooftop PV systems for homes, typically single-phase 220V/380V grid connection. |
| Commercial & Industrial PV | Factories, malls, schools, etc., requiring high capacity (100kW~1MW). |
| Ground-Mounted PV Plants | Large-scale centralized plants (1MW+), requiring medium-voltage (10kV/35kV) grid connection. |
| Agrivoltaics | Solar greenhouses, fishery-PV hybrid projects, requiring moisture & corrosion resistance. |
| PV + Energy Storage | Hybrid PV-storage systems, supporting on-grid/off-grid switching. |
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