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DC Distribution Box

Fully customizable up to 32 strings
Available from 600 VDC to 1500 VDC
Available in UV resistant FRP/GRP/PC enclosure (IP66, IK10)
Built-in touch safe fuse & fuse holders and DC Isolator/ MCB.
Integrated surge protection devices (SPD) & pressure equalizers
Class II insulation
Ambient Temperature -10°C to +55°C

Compliance & Warranty

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About this item:

Product Description

In the vibrant landscape of solar energy infrastructure, two unsung heroes play pivotal roles: the Solar Array Junction Box (AJB) and the DC Distribution Box (DCDB). These unassuming components are the backbone of solar PV systems, orchestrating the efficient flow of DC power from solar panels to inverters and beyond. Let’s delve into their significance and contributions:

Solar Array Junction Boxes (AJB):

At the heart of every solar PV array lies the Solar Array Junction Box (AJB), a silent guardian orchestrating the harmonious synergy of individual solar panel strings. Encased in robust, weatherproof enclosures, AJBs are meticulously engineered to withstand the rigors of outdoor environments. Within these enclosures, high-conductivity copper busbars link multiple solar panel strings, while surge protection devices stand guard against lightning strikes and transient voltage spikes. String-level monitoring devices ensure optimal performance, while communication interfaces enable seamless integration with monitoring systems. With IP65 protection and compliance with international standards, AJBs epitomize reliability, efficiency, and safety in solar power distribution.

DC Distribution Boxes (DCDB):

Navigating the labyrinth of solar PV installations, the DC Distribution Box (DCDB) stands as a beacon of power management and protection. Crafted from rugged materials, DCDBs house a symphony of circuit protection devices, surge suppressors, and monitoring equipment. Bolted connections and high-capacity copper busbars ensure robust power transmission, while surge protection devices safeguard against voltage fluctuations. Real-time monitoring capabilities and communication interfaces empower operators to monitor system performance remotely, ensuring seamless operation and swift response to anomalies. With CE marking and compliance with international standards, DCDBs embody the pinnacle of reliability and efficiency in solar power distribution.

Conclusion:

As the solar energy revolution unfolds, Solar Array Junction Boxes (AJBs) and DC Distribution Boxes (DCDBs) stand as steadfast guardians of efficiency, reliability, and safety. Through their unassuming presence, these components orchestrate the seamless flow of DC power, powering the transition towards a sustainable energy future. In the tapestry of solar infrastructure, AJBs and DCDBs shine as unsung heroes, driving progress one watt at a time.

Technical Specification

1. Enclosure
• Material: Weatherproof and durable FRP/PC enclosure
• Protection Rating: IP65 or higher for protection against dust, water, and environmental elements.
• Dimensions: Customizable sizes to accommodate required components and installation specifications.
• Mounting: Wall-mounted or pole-mounted options available for flexible installation in various solar PV array configurations.

2. Input Terminals
• Rated Voltage: Compatible with the voltage rating of the solar PV array, typically ranging from 600V to 1500V DC.
• Input Strings: Configurable to accommodate multiple input strings of solar panels, with options for series and parallel connections.
• Input Capacity: Depending on the system design and capacity, SCBs may support input capacities ranging from 6 to 24 strings or more.

3. String Monitoring and Protection
• Monitoring Devices: Built-in monitoring devices such as string-level DC combiners, string current sensors, and voltage meters for real-time monitoring of string performance.
• Overcurrent Protection: Circuit breakers or fuses rated for DC operation to protect individual strings from overcurrent conditions and faults.
• Surge Protection: Integrated surge protection devices to safeguard against lightning strikes and transient voltage surges.

4. Busbars and Connectors
• Material: High-conductivity copper busbars for efficient and low-resistance power distribution.
• Rating: Rated for continuous operation at system voltage levels, typically ranging from 600V to 1500V DC.
• Connection Type: Bolted or compression-type connectors for secure and reliable connection of input strings and output cables.

5. Monitoring and Control
• Communication: Optional communication interfaces (e.g., RS485, Modbus, Ethernet) for remote monitoring and data logging of string-level performance metrics.
• Alarm Indication: Visual or audible alarms for fault detection, abnormal string performance, or system malfunctions.
• Remote Monitoring: Compatibility with external monitoring systems or SCADA for centralized monitoring and control of multiple SCBs within a solar PV installation.

6. Environmental Conditions
• Operating Temperature: -25°C to +60°C (may vary based on enclosure and component specifications) to withstand varying environmental conditions.
• Humidity: Operating humidity range of 5% to 95% RH (non-condensing) to ensure reliable operation in different climatic conditions.
• Altitude: Rated for operation at altitudes up to 2000 meters above sea level (may vary depending on design considerations).

7. Compliance and Certification
• Standards: Designed and manufactured in compliance with relevant international standards (e.g., IEC 61439, UL 1741).
• Certification: CE marking or equivalent certifications indicating compliance with safety and performance standards for solar PV equipment.

8. Accessories and Optional Features
• Temperature Sensors: Integrated temperature sensors for monitoring ambient temperature within the SCB enclosure.
• Remote Trip Facility: Remote trip functionality for circuit breakers to facilitate quick isolation of faulty strings during maintenance or troubleshooting.
• Lightning Arresters: Additional lightning arresters for enhanced protection against lightning-induced surges in areas prone to thunderstorms.
• Alarm Notifications: Configurable alarm notifications via email or SMS for immediate alerts on string faults, anomalies, or performance deviations.
• Integration: Open architecture design for seamless integration with third-party monitoring and control systems using standard communication protocols.
• In case of monitoring:
• Communication:
• Communication Protocols: Compatibility with industry-standard communication protocols such as Modbus RTU, Modbus TCP/IP, or RS485 for seamless integration with monitoring systems.
• Wireless Connectivity: Optional support for wireless communication protocols such as Zigbee or Bluetooth for remote monitoring and data transmission.
• Data Transmission Rate: High-speed data transmission capabilities to ensure real-time monitoring and response to changes in string performance.
• Data Acquisition:
• Voltage Measurement Range: Typically, compatible with DC voltages ranging from 0V to 1500V DC, suitable for various solar PV array configurations.
• Accuracy Range: ± 0.5%
• Current Measurement Range: Support for precise measurement of string currents ranging from a few milliamperes to several amperes.
• Temperature Measurement: Integrated temperature sensors for monitoring ambient temperature and solar panel temperatures.
• SPD status & DC switch status: Provision for integrating SPD status & DC switch status.
• Irradiance Measurement: Optional sensors for measuring solar irradiance levels to assess solar panel performance.

FAQ

1. Why is SPD used in AJB?

SPD, or Surge Protection Device, is used in the AJB/SCB to protect electrical and electronic equipment from power surges and voltage spikes by diverting excess voltage and current into the ground through the earthing system.