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About UsHunan Chengyuan Electrical CO.,LTD stock code 872783 was founded in 1999, is a photovoltaic new energygeneration, energy storage, charging integrated system solutions
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Photovoltaic grid-connected cabinet
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Product Description
The grid-tied PV cabinet is a dedicated complete set of switching equipment at the "inverter-grid" boundary in a photovoltaic power station, undertaking four core functions: grid connection protection, metering, monitoring, and isolation. Typical configurations and requirements are as follows:
1. Functional Configuration
• Protection: Loss of voltage/voltage automatic switching, anti-islanding, overvoltage/undervoltage, overcurrent, short circuit, lightning protection, and anti-reverse current.
• Metering: Reserved for bidirectional smart meters and negative control positions to meet the grid company's metering and subsidy settlement needs.
• Monitoring: Standard RS-485/Modbus-RTU, optional PLC, 4G/5G, Ethernet, to achieve remote switching, power generation statistics, fault recording, and power quality monitoring.
• Governance: Expandable intelligent capacitor, SVG/APF modules, on-site harmonic and reactive power governance to ensure that the power factor passes the initial acceptance test.
2. Structure and Installation
• Cabinet: Indoor IP30～IP54 optional, outdoor IP65, cold-rolled steel plate or 304 stainless steel, double-door, bottom entry and exit, fully sealed visualized design of copper busbars, complete grounding busbars and warning signs.
• Installation: Height ≥1.8 m, leaving a ≥0.6 m operating passage; supports wall mounting, floor standing, or frame type, and can be bottom or top cable entry.
• Identification: Panel silk-screen printing "Grid-tied cabinet" "High voltage danger", including primary system diagram, operating instructions, and QR code electronic manual.
3. Technical Parameters (Conventional 0.4 kV System Example)
Rated operating voltage: AC 400 V/690 V
Rated current: 250 A, 400 A, 630 A, 800 A, 1000 A multiple options available
Rated short-time withstand current: 25 kA / 1 s
Rated short-circuit closing current: 50 kA
Protection level: Indoor IP30～IP54, outdoor IP65
Operating temperature: -25 ℃～+55 ℃
Communication interface: RS-485 (standard), Ethernet, 4G (optional)
Metering accuracy: Active power 0.5S grade, reactive power 2 grade
4. Typical Applications
• Commercial and industrial rooftops, distributed power stations, household photovoltaic systems
• Cement, steel, data centers, and other large industrial self-generation and self-use projects
By selecting grid-tied cabinets that have passed the IEC 61439-1/6, GB/T 7251.12 full-type test (TTA), on-site grid connection debugging can be completed within 15 days, meeting the differentiated acceptance requirements of various grid companies.
Key word: Photovoltaic | Semiconductor | Silicon Carbide | Sapphire | Magnetic Materials | Silicon Wafer Cutting Service
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Room 504, Building 8, Xincheng Science and Technology Park, 588 Yuelu West Avenue, Changsha High tech Development Zone, Hunan Province, China