Overview
The photovoltaic grid-connected box is used for PV power stations built near the user's site. It operates on a self-consumption model on the user side, with excess electricity fed into the grid. To ensure safe system operation, coordinate safety between the inverter and the utility grid, and improve system reliability and energy metering, this PV grid-connected distribution box was designed. The product features high protection level, long service life, and easy installation and operation. Its functions include isolation protection, overload protection, short-circuit protection, surge and grounding protection, over/under voltage protection with automatic reconnection after recovery, and power generation metering, among others.
Product Advantages
▪ The metal enclosure is made from cold-rolled steel or stainless steel produced by WISCO, with a protection rating of IP54 or higher, suitable for outdoor installation.
▪ The box adopts a two-layer design. The top layer functions as a roof to prevent rainwater from entering the box; the middle layer houses the PV metering meter, which can be observed through a transparent glass panel.
▪ Various data at the meter can be viewed, and a sealing interface is provided on the door lock; the bottom layer is designed as a control and protection area, making maintenance and inspections convenient for personnel.
▪ The grid input holes can receive cables from either the bottom or the side. When using the side entry, IP66 waterproof connectors are installed to maintain the box's protection level.
▪ The inverter input hole is designed at the bottom, making on-site connections easier. Inside, the isolation switch uses a well-known brand and features a clearly visible disconnection point, with a design capacity more than 1.5 times the inverter's output current.
▪ The box is equipped with PV over/under voltage protection devices and voltage recovery reconnection devices. Besides undervoltage protection, it also protects against unstable grid voltage.
▪ It includes lightning surge protection, with the standard discharge current of the surge protector at 40KA. In areas with frequent storms, larger surge protectors can be selected, with a discharge current up to 100KA.
▪ Overcurrent protection circuit breakers are designed for the box to ensure reliable disconnection in case of overload or short circuit.
▪ The internal mounting plate can be configured with epoxy insulation panels according to customer requirements, with a thickness of at least 5mm.
▪ Anti-islanding devices can be configured based on customer needs.
Technical Parameters
| Model (HJBWX-BL) | 05 | 10 | 15 | 30 | 40 | 50 | 60 | 90T | 110T | 130T |
| Basic parameters | ||||||||||
| Number of inverter input channels | 1 | |||||||||
| Number of output channels | 1 | |||||||||
| Rated AC voltage | 220V/230V/240V | 400V | ||||||||
| Maximum rated input current | 32A | 63A | 32A | 63A | 80A | 100A | 125A | 200A | 225A | 250A |
| Rated frequency | 50HZ/60HZ | |||||||||
| Electricity meter connection | Direct access | Direct access / Secondary access | Secondary access | |||||||
| Outer shell body | ||||||||||
| Cabinet material | PC/SMC/cold-rolled steel/stainless steel | |||||||||
| Protection rating | IP65 | |||||||||
| Collision protection rating | IK10 | |||||||||
| Cabinet dimensions | Customization | |||||||||
| Inverter access port | M50(32.7 ~ 38mm) | |||||||||
| Grid access ports | M50(32.7 ~ 38mm) | |||||||||
| Isolating switch | ||||||||||
| Rated Voltage (AC) | 230V | 400V | ||||||||
| Rated Current (AC) | 63A | 100A | 100A | 200A | 400A | |||||
| Type | Single projection switch | |||||||||
| Over/undervoltage protector | ||||||||||
| Types of circuit breakers | 2P | 4P | ||||||||
| Rated Voltage (AC) | 230V | 400V | ||||||||
| Maximum Current (AC) | 63A | 80A | 125A | 250A | ||||||
| Overvoltage Protection Value (Phase Voltage) | ≥ 290V | 253 ~ 300V | ||||||||
| Undervoltage Protection Value (Phase Voltage) | ≤ 150V | 154 ~ 187V | ||||||||
| Loss of Voltage Protection Value (Phase Voltage) | < 45V | - | ||||||||
| Rated frequency | 50HZ/60HZ | |||||||||
| Model (HJBWX-BL) | 05 | 10 | 15 | 30 | 40 | 50 | 60 | 90T | 110T | 130T |
| AC surge protector | ||||||||||
| Maximum Operating Voltage (AC) | 230 | 400 | ||||||||
| Maximum Discharge Current (AC) | 40KA | |||||||||
| AC circuit breaker | ||||||||||
| Types of circuit breakers | 2P | 4P | ||||||||
| Rated Voltage (AC) | 400V | |||||||||
| Rated Current (AC) | 32A | 60A | 32A | 60A | 80A | 100A | 125A | 200A | 225A | 250A |
| Rated frequency | 50HZ/60HZ | |||||||||
| Environmental parameters | ||||||||||
| Operating temperature | -20℃ ~+60℃ | |||||||||
| Operating humidity | 99% | |||||||||
| Elevation | 2000m (load reduction above 2000m) | |||||||||
| Installation method | Wall-mounted installation | |||||||||
| Optional features | ||||||||||
| AC fuse | Optional | |||||||||
| Over/undervoltage protector | Optional | |||||||||
| AC leakage protector | Optional | |||||||||
PV Grid-Connected Box Wiring Diagram and Layout
Single-Phase AC Grid-Connected Box Electrical Wiring Diagram
Single-Phase AC Grid-Connected Box Electrical Layout Diagram
PV Grid-Connected Box Wiring Diagram and Layout
Three-Phase AC Grid-Connected Box Electrical Wiring Diagram under 30kW
Three-Phase AC Grid-Connected Box Electrical Layout Diagram under 30kW
Address：No. 389, Changjiang Road, Liushi Town, Yueqing City, Zhejiang Province
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