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Grid Connection Box
Overview
This product is primarily designed for residential photovoltaic distributed grid-connected power generation systems and small-scale commercial and industrial photovoltaic power generation systems. It is connected in series between the grid-connected inverter and the power grid. The product incorporates comprehensive protections including anti-islanding protection, voltage detection for closing, voltage loss tripping, grid low voltage, grid overvoltage, input lightning protection, system overcurrent, and grid isolation. Precise energy metering, transmission, and intelligent operation control are essential components of residential grid-connected power generation systems. The product has obtained industry-standard CCC certification and CE certification.
Key Features
- Reserved installation space for metering meters and data collectors;
- Meter viewing window and lead seal port (anti-tampering): Integrated design concept with complete isolation between distribution and metering sections to reduce electromagnetic interference; Multiple self-resetting over/under-voltage protectors and optional PV-specific reclosing circuit breakers to meet regional requirements and acceptance standards; Enclosure requires specialized key for opening, enabling professional management;
- Choice of powder-coated or stainless steel enclosures: Outdoor installation ensures enhanced safety;
- Supports customization for special requirements and functions.
Key Technical Parameters
Product Model | BWX Single-Phase | BWX Three-Phase |
Installed Power | 3KW~20kW | 3KW~200KW |
Number of Inverter Input Channels | 1 channel/2 channels/3 channels/4 channels (Combiner box recommended for 4 channels) | |
Number of Grid-Connected Output Channels | 1 channel | |
Grid Connection Requirements | Single-phase/Three-phase grid connection | |
Number of Output Channels | 1/2/3/4/5/6 | |
Grid-Tied Voltage | AC:220V / AC:380V | |
Switch Capacity | 20A-100A | 32A-400A |
Protection Features | ||
Short-Circuit Protection | Yes | |
Overload Protection | Yes | |
Lightning Protection | Yes | |
Isolation Protection (Visual Breakpoint) | Yes (Knife Switch/Manual Disconnect Switch) | |
Overvoltage/Undervoltage Protection | Yes | |
Automatic Reclosing | Yes | |
Grid Tie Switch | ||
Self-resetting Over/Under-voltage Protector (Optional) 40A~125A | 1. Automatically trips (internal disconnection) when grid power fails or voltage imbalance exceeds 20%. 2. Automatically re-closes (internal reconnection) when grid power is restored. | |
Photovoltaic Dedicated Miniature Reclosing Circuit Breaker (Optional) 20A~100A | 1. Automatically trips when grid power fails or voltage deviation exceeds 20% (operated by handle) 2. Automatically re-energizes when grid power is restored (operated by handle) 3. Manual and automatic operation modes are switchable 4. Features voltage detection before re-energization | |
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