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Product Introduction
This product features a 1-input, 1-output design, supporting one PV string input and one DC output. It is especially suitable for applications such as small photovoltaic systems, rooftop solar systems, courtyard solar systems, and single-string protection. The housing is made of high-strength PC/ABS material, with an IP65 Waterproof PV Distribution Box rating, offering dustproof, waterproof, and impact-resistant performance to meet the stringent requirements of outdoor installation environments.
The primary functions of this product are power distribution and protection of lines and power equipment against damage from overloads, short circuits, undervoltage, and other faults. Under normal conditions, it can be used for infrequent switching of circuits and infrequent starting of motors; it can also serve as overload, short-circuit, and undervoltage protection for motors. Designed as a reliable IP65 Waterproof PV Distribution Box, it ensures long-term stability in harsh weather conditions, while its compact structure makes it an ideal IP65 Waterproof PV Distribution Box for decentralized solar installations. For added safety, every IP65 Waterproof PV Distribution Box undergoes rigorous testing to guarantee consistent performance in real-world outdoor scenarios.
Internal Components
|
Component |
Specification |
|
DC Miniature Circuit Breaker |
DC 1000V, 4P, with protective functions |
|
DC Fuse |
DC 1000V, 10×38mm, 15A |
|
DC Surge Protective Device (SPD) |
DC 1000V, 2P, 40kA |
FEATURE
|
Feature |
Description |
|
1. Power Collection and Distribution |
As a DC distribution hub for the photovoltaic system, this combiner box centrally connects the DC output cables from PV strings. After busbar aggregation, the combined output is delivered to the inverter, making cable routing orderly and facilitating group inspection and maintenance. Its 1-input, 1-output simplified design makes it an ideal choice for single-string PV systems. |
|
2. Overload and Short-Circuit Protection |
The product is equipped with built-in DC fuses or miniature circuit breakers. When abnormal currents or short circuits occur in the circuit, it can quickly disconnect the circuit, effectively protecting PV modules and downstream equipment such as inverters from overload and short-circuit damage. The DC miniature circuit breaker can also be used for infrequent switching of circuits and infrequent starting of motors. |
|
3. Surge Protection (Lightning Protection) |
The product is fitted with a DC surge protective device (SPD), which can divert surge currents induced by lightning strikes or switching operations and limit surge voltages to a safe level, effectively safeguarding the PV system against lightning and switching overvoltages. |
|
4. Maintenance Isolation Function |
The built-in DC circuit breaker can open and isolate the circuit during equipment inspection, maintenance, or module replacement, providing a safe working environment for operation and maintenance personnel. |
Selection and Installation Precautions
System Voltage Confirmation: Please select the appropriate voltage version (600V or 1000V) based on the open-circuit voltage of the PV string and the DC input voltage of the inverter. The selected voltage rating must not be lower than the maximum DC voltage of the system.
Rated Current Matching: Please choose the appropriate fuse rating (15A/20A/25A/30A/32A) according to the operating current of the PV string.
Polarity Check: Before wiring, be sure to use a multimeter to verify cable polarity and ensure correct connection of positive and negative terminals.
No Load Operation: Do not perform plug-in/plug-out or maintenance operations under load, as this may cause DC arcing and lead to safety hazards.
Installation Location: It is recommended to install the combiner box in a well-ventilated location away from direct sunlight to ensure it operates within the normal temperature range.
Grounding Requirements: Ensure reliable grounding of the combiner box in compliance with electrical codes.
Regular Maintenance: It is recommended to periodically check whether internal connections are loose, whether fuses are in normal condition, and whether the surge protective device's indicator window has changed colour.
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