Main Features
- Reserved space for installation of electricity meters and data collection devices.
- The metering cabinet is visible and lead-sealable (anti-theft electricity). It adopts an integrated design concept, with complete electrical isolation between the power distribution and metering sections to reduce electromagnetic interference.
- Multiple types of self-reclosing over/undervoltage protectors and photovoltaic-specific reclosing circuit breakers are available as options, meeting the usage requirements and acceptance standards of different regions.
- The cabinet cover can only be opened with a professional key, realizing professional management.
- Both spray-coated steel enclosures and stainless steel enclosures are available for selection, enabling safe outdoor installation.
- Supports special requirements and customized functions.
Technical Specifications
| Item | QYBWG Single-phase | QYBWG Three-phase |
| Product Model | QYBWG Single-phase | QYBWG Three-phase |
| Installation Power | 3kW~20kW | 3kW~200kW |
| Inverter Input Circuits | 1/2/3/4 (combiner box recommended for more than 4 circuits) | 1/2/3/4 (combiner box recommended for more than 4 circuits) |
| Grid-Connected Output Circuits | 1 | 1 |
| Grid-Connection Requirement | Single-phase / Three-phase grid connection | Single-phase / Three-phase grid connection |
| Grid Voltage | AC: 220V | AC: 380V |
| Switch Capacity | 10A~100A, 10A~200A | 10A~400A |
| Protection Functions | ||
| Short-circuit Protection | Yes | Yes |
| Overload Protection | Yes | Yes |
| Lightning Protection | Yes (Nominal discharge current: 20kA; Max discharge current: 40kA; Voltage protection level ≤ 4kV) | Yes (Nominal discharge current: 20kA; Max discharge current: 40kA; Voltage protection level ≤ 4kV) |
| Isolation Protection (Visible Breakpoint) | Yes (Knife switch / Hand-pull isolating switch) | Yes (Knife switch / Hand-pull isolating switch) |
| Over/Under Voltage Protection | Yes | Yes |
| Auto-reclosing | Yes | Yes |
| Grid-Connected Switch | ||
| Self-reclosing Over/Under Voltage Protector (Optional, 40A~125A) | 1. Auto-disconnect (internal disconnection) when grid power failure or voltage deviation >20% 2. Auto-absorb (internal connection) when grid power restored | 1. Auto-disconnect (internal disconnection) when grid power failure or voltage deviation >20% 2. Auto-absorb (internal connection) when grid power restored |
| PV Small-type Reclosing Circuit Breaker (Optional, 20A~100A) | 1. Auto-trip (operating handle action) when grid power failure or voltage deviation >20% 2. Auto-reclose (operating handle action) when grid power restored 3. Switchable between manual and automatic operation 4. Voltage hold-off | 1. Auto-trip (operating handle action) when grid power failure or voltage deviation >20% 2. Auto-reclose (operating handle action) when grid power restored 3. Switchable between manual and automatic operation 4. Voltage hold-off |
| Moulded Case Reclosing Breaker (Optional, 40A~400A) | 1. Auto-trip when grid power failure or voltage deviation >20% (0~10S adjustable delay trip time) 2. Auto-reclose when grid power restored 3. Switchable between manual and automatic operation 4. Phase loss protection, zero-sequence protection 5. Voltage hold-off | 1. Auto-trip when grid power failure or voltage deviation >20% (0~10S adjustable delay trip time) 2. Auto-reclose when grid power restored 3. Switchable between manual and automatic operation 4. Phase loss protection, zero-sequence protection 5. Voltage hold-off |
| Environmental Adaptation | ||
| Temperature & Humidity | Operating temperature: -25°C to +60°C Storage temperature: -40°C to +70°C Humidity: 0~90% non-condensing, non-corrosive gas environment (special note required if applicable) | Operating temperature: -25°C to +60°C Storage temperature: -40°C to +70°C Humidity: 0~90% non-condensing, non-corrosive gas environment (special note required if applicable) |
| Altitude | ≤ 3000m | ≤ 3000m |
| Salt Fog Resistance | Standard salt spray test for 72 hours | Standard salt spray test for 72 hours |
| General Parameters | ||
| Cabinet Material | Stainless steel, cold-rolled steel with spray coating, stainless steel with spray coating, SMC, transparent plastic | Stainless steel, cold-rolled steel with spray coating, stainless steel with spray coating, SMC, transparent plastic |
| Protection Class | Outdoor IP45 / IP55 / IP65 | Outdoor IP45 / IP55 / IP65 |
| Cabinet Structure | Double-door with meter position (with power distribution and metering compartments), single-door without metering compartment (optional) | Double-door with meter position (with power distribution and metering compartments), single-door without metering compartment (optional) |
| Installation Method | Wall-mounted | Wall-mounted |
| Cabinet Dimensions (LWH) | Customizable | Customizable |
Grid-Connection Box Wiring Diagram & Layout Diagram
Cable Processing Requirements and Related Equipment
- All cable lugs shall adopt universal standard lugs compliant with the power industry specifications. Different colors shall be selected in accordance with the cable phase sequence to ensure that the copper conductors of the cables are not exposed.
- Fully automated machines are adopted for cable cutting and stripping. Cables of different lengths can be cut and stripped as required, ensuring consistent cable lengths during mass production.
Cable Processing Requirements and Related Equipment
| Grid-Connected Cabinet Power | Maximum Inverter Output Current | Main Circuit Cable (Minimum Cross-section) | Surge Protector Cable (Minimum Cross-section) | Grounding Cable (Minimum Cross-section) |
|---|---|---|---|---|
| Single-phase 3kW | 15A | 4mm² | 4mm² | 4mm² |
| Single-phase 5kW | 25A | 6mm² | 6mm² | 6mm² |
| Single-phase 10kW | 50A | 16mm² | 16mm² | 16mm² |
| Three-phase 8kW | 14A | 4mm² | 4mm² | 4mm² |
| Three-phase 10kW | 17A | 6mm² | 6mm² | 6mm² |
| Three-phase 15kW | 25A | 6mm² | 6mm² | 6mm² |
| Three-phase 20kW | 33.5A | 10mm² | 10mm² | 10mm² |
| Three-phase 25kW | 42A | 10mm² | 10mm² | 10mm² |
| Three-phase 30kW | 50A | 16mm² | 16mm² | 16mm² |
| Three-phase 40kW | 67A | 25mm² | 16mm² | 16mm² |
| Three-phase 50kW | 83.5A | 25mm² | 16mm² | 16mm² |
| Three-phase 60kW | 100A | 25mm² | 16mm² | 16mm² |
| Three-phase 80kW | 134A | 35mm² | 16mm² | 16mm² |
| Three-phase 90kW | 150A | 35mm² | 16mm² | 16mm² |
| Three-phase 100kW | 167A | 50mm² | 16mm² | 16mm² |
| Three-phase 120kW | 200A | 50mm² | 16mm² | 16mm² |