HJLX-PV Smart PV Lightning Protection Combiner Box

Intro：The HJLX-PV smart photovoltaic lightning protection combiner box gathers the DC inputs from 24 strings of PV modules into one or multiple outputs. Each output has a fuse, and comes with a lightning protector and a circuit breaker, which greatly simplifies the wiring for DC distribution cabinets and inverters. It provides lightning protection, short-circuit protection, and grounding protection. There are two types of combiner boxes: smart and non-smart. The smart lightning protection combiner box includes a monitoring unit that can track the current of each PV string input, the total output voltage, the temperature inside the box, and the status of the lightning protectors and circuit breakers.

Product Inquiry

Introduction

Overview

The HJLX-PV intelligent photovoltaic lightning protection combiner box combines the DC inputs of 24 photovoltaic cell modules in series into one or more outputs, each equipped with a fuse, and the output is equipped with a surge arrester and circuit breaker, greatly simplifying the input wiring of the DC distribution cabinet and inverter. It provides lightning protection, short-circuit protection, and grounding protection. Combiner boxes are divided into intelligent and non-intelligent types. Inside the intelligent lightning protection combiner box, there is a combiner monitoring unit that can monitor the current input to each photovoltaic cell string, the total output voltage, the temperature inside the enclosure, the status of the lightning arrester, and the status of the circuit breaker.

The internal layout of this device is simple and clear, with neat and reasonable wiring. It offers high reliability and easy maintenance. Outdoor wall-mounted installation can adapt to various harsh environments. Except for core components, other components can be customized according to user requirements.

Electrical technical parameters

Product models	HJLX‑PV24	HJLX‑PV16	HJLX‑PV12	HJLX‑PV8
Number of input channels	17~24	13~16	8~12	Below route 8
Maximum input voltage	1000VDC
Each input current is provided	0~20A
Maximum output current	250A	160A/200A	100A/125A/160A	Below 100A
Enter the size of the waterproof terminal	PG9/PG11/MC4
Output waterproof terminal size	PG21~PG32	PG19~PG25	PG16~PG21	PG13.5~PG19
Monitoring module	Detects each current, bus voltage, circuit breaker status, lightning arrester status, and enclosure temperature (optional)
Communication methods/protocols	RS485 bus/standard MODBUS-RTU protocol
Anti-recoil function	Equipped with modular packaged anti-reverse diodes (optional)
Temperature and humidity	Operating temperature: -40~+85°C, humidity 95%, no condensation or corrosive gases
Elevation	≤ 4000m
Monitor module power consumption	At work ≤ 8W
Auxiliary power supply	Auxiliary power supply: AC85V~265V/DC24V (±10%)/DC200V~1000V
Cabinet material	Hot-dip galvanized steel sheets/stainless steel/cold-rolled steel sheets/engineering plastics
Protection rating	IP65
Volume (width × height × depth)	850mm×500mm×200mm	800mm×500mm×180mm	720mm×500mm×180mm	630mm×500mm×180mm
Weight	10~35kg

Functional features

The combiner box has an IP65 protection rating, featuring waterproofing, dust-proof, rust-proof, and salt spray resistance, meeting outdoor installation requirements;

Can connect up to 24 batteries in series simultaneously;

Each cell series is equipped with photovoltaic-specific fuses for both positive and negative lines to protect module strings in case of faults. The fuse base and fuses are used together to reduce the owner's maintenance costs and effectively safeguard the personal safety of repair personnel;

Using photovoltaic-specific high-voltage lightning arresters can protect the busbar after merging between positive and negative ground, with continuous operating power (Uc) reaching 1000VDC;

The power module inside the combiner box can connect to a photovoltaic voltage of 1000DCV;

The combiner box measurement and control module uses reliable Honeywell Hall components (DC CT sensors) to collect and monitor current and bus voltage for each photovoltaic string, issue alarms, and locally locate faults. It can also measure the temperature inside the combiner box and detect the status of lightning protectors and output circuit breakers;

The monitoring module inside the combiner box features digital display functionality, showing the current of each component string, bus voltage, temperature inside the combiner box, status of circuit breakers and lightning arresters, system power, equipment address, and other related information on the equipment;

Supports RS485/MODBUS-RTU serial communication;

Both the external interface sections are equipped with lightning protection;

It can receive parameter downloads from local monitoring devices for analysis and processing;

The combiner box can operate with an external 220VAC/DC power source or be powered by the combiner box itself. If the combiner box itself is powered, there is no need for separate power supply or wiring on site.

PrevAnti-islanding Device