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Photovoltaic Cables: The "Vascular Network" of Power Plants—Choosing the Wrong One Can Lead to "Clots"!
Photovoltaic Cables: The "Vascular Network" of Power Plants—Choosing the Wrong One Can Lead to "Clots"!
In a photovoltaic power plant, components, inverters, and mounting systems often take center stage in discussions, but did you know? There’s a “low-key yet crucial” element that is actually the key to supporting the entire system’s efficient and stable operation. O’s right— photovoltaic cables .
Some say cables are like the “vascular network” of the photovoltaic system, transporting a continuous flow of electricity. If something goes wrong, it can cause a blockage, leading to the entire system "shutting down." Today, let’s talk about this “lifeline” and how to choose the right one to avoid hidden "clot" risks.
1. Why Are Photovoltaic Cables the "Vascular System"?
Photovoltaic cables run throughout the entire system, connecting modules, combiner boxes, inverters, and distribution systems. They are exposed year-round to extreme conditions like high temperatures, UV radiation, and rain and snow, so their operational intensity is very high.
2. Common “Clot” Problems and Accident Cases
🔥 Case 1: Frequent Tripping at a 50MW Ground-mounted Station in Jiangsu
Problem : Ordinary PVC plastic cables were used. After two years, the outer insulation cracked due to aging, and water entered during rainy days, causing short circuits and frequent system trips.
Losses : Annual losses of approximately 300,000 RMB in power generation revenue, with cables needing to be replaced later.
🔥 Case 2: Cable Fire in a Middle Eastern Project
Background : A high-temperature desert area didn’t use TüV-certified high-temperature cables. The surface temperature exceeded 90°C in summer.
Consequences : After prolonged high-temperature operation, the insulation of the cables broke, causing a fire that destroyed six strings.
Lesson : Incorrect cable selection = burning money!
3. Four Key Standards for Choosing the Right Cable
| Project | Recommended Selection | Risk Warning |
|---|---|---|
| Malzeme | Photovoltaic-specific cross-linked polyethylene insulation (PV1-F) | Avoid PVC material, as it has poor weather resistance |
| Temperature Rating | -40°C ~ +120°C | High-temperature areas require good heat resistance |
| Wire Gauge | Calculated based on current, distance, and voltage drop (generally 4~6mm²) | Too small a gauge can lead to overheating and power loss |
| Sertifikalar | TüV, UL, CE, CCC, etc. | Especially for export projects, certification cannot be skipped |
4. Installation Matters Too—Don't Let "Good Cables" Go to Waste!
📍 Common Installation Issues :
Not using conduit/protection → Risk of animal bites.
Shallow burial or no sand cushion → Dampness or compression deformation.
Tight cable bundling → Heat expansion and cold contraction causing insulation damage.
Insufficient slack → Tension breaks wires or loosens connections.
📸 Image Suggestion : Comparison image—correct vs. incorrect installation methods.
5. Low Cost Share, but the Risk Consequences Are Huge
Many people try to "cut corners" on cables to save money, but in reality:
A complete system may cost hundreds of thousands or even millions, but cables only account for 3%-5% of the cost.
A single failure or a small fire can cost thousands to tens of thousands of RMB!
6. Final Thoughts: Don't Wait Until the "Vessel Gets Blocked" to Realize the Importance of Cables!
Photovoltaic cables are not supporting roles but rather the "invisible heroes" ensuring the stable operation of the entire system. Choosing the right cables = providing quality "veins" for the power plant, reducing failures, extending lifespan, and increasing returns.
👉 Summary in One Sentence : Cables may be small, but their responsibility is huge. You can save money where possible, but don’t skimp on this!
🎁 Uç : The 3-second rule to judge the quality of photovoltaic cables:
Look : Is the label clear? Does it have certification marks?
Feel : Is it soft and smooth to the touch, flexible with no strange odor?
Ask : Does it have TüV or UL reports? Can it be guaranteed for 25 years?
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