QYHLX Photovoltaic DC junction box

Main Features

• The cabinet is made of hot-dip galvanized steel plate, ensuring a safe and reliable structure with sufficient mechanical strength to prevent shaking or deformation after component installation and operation.
• Protection class IP65, with waterproof, dust-proof, rust-proof, and salt-fog-proof capabilities to meet the requirements of outdoor installation.
• Can simultaneously input up to 24 photovoltaic strings.
• Each positive and negative pole of the battery string is equipped with a photovoltaic-specific fuse for protection. The circuit breaker base and fuse base are used together to reduce later-stage maintenance costs and effectively protect the personal safety of maintenance personnel.
• The DC output busbar is equipped with a photovoltaic-specific surge arrester, providing excellent surge protection between positive-to-ground, negative-to-ground, and positive-to-negative poles. The combiner box is equipped with a modular intelligent detection unit to monitor the current, output voltage, string temperature, surge arrester status, and circuit breaker status of each string.
• The current measurement adopts a Hall sensor zero-flux measurement method, which realizes complete electrical isolation between the measurement equipment and the electrical equipment. Even if a problem occurs in the measurement unit, it will not affect the normal operation of the system, effectively improving power generation efficiency and equipment safety.
• The intelligent detection unit has a self-coded digital display function, which can display information such as current, voltage, power, temperature, equipment address, and equipment number on the device itself. The equipment address can be set simply and conveniently on the detection unit, and can be changed locally without auxiliary equipment.
• The whole machine of the modular combiner box intelligent detection unit consumes less than 4W, with a measurement accuracy of 0.5%.
• It is equipped with a variety of data transmission methods, providing RS485 interface and wireless ZigBee interface, and the communication interface has built-in lightning protection function to effectively protect the equipment communication port.
• The modular combiner box intelligent detection unit adopts a self-powered mode of 1000V/1500V DC, and the self-powered module adopts a modular potting package.
• The power supply has functions such as reverse connection prevention, overcurrent, overvoltage protection, and corrosion prevention.

Technical Specifications