With the widespread use of rows, the quality and price of the rows become the preferred requirements. For me, this is often the result of the fire in the mountains, and the swords and guns are not one after the other. Still full of care for safety.
Some time ago, when the water was boiled with a kettle, I just snapped it and I was shocked. I was shocked. Opened and looked at, it was the "Hangzhou" brand, never heard of it, produced in Cixi, Zhejiang. The copper wire in the inside burned and short-circuited the insulation. ( ps : forgot to take a picture at that time).
This really is called the listener is sad, the person who hears tears.
Is this incident accidental or inevitable? It is not always a question of character! To solve this puzzle, let's first understand why the explosion will explode?
Reproduced
1. Use inferior patch panels. In order to reduce the cost, some plug-in board manufacturers use materials that do not have flame-retardant properties. When the plug-in board is short-circuited or near a fire source, it can easily catch fire. Some plug-in boards use inferior copper wires as current conductors. Once the load is overloaded, it can momentarily cause a dangerous situation of short circuit or leakage.
2. The overload of the power strip is too large. The plugs, wires, jacks, and other parts of the patch panel are current-limited. If multiple high-power appliances are connected to the patch panel at the same time, the load of the patch panel will be too large, and it may even burn or ignite.
3. Dust causes plugging of the jack. Because dust has a high surface energy, it is more prone to physical or chemical changes and releases energy than bulk materials. When flammable dust ( dust of materials such as cocoa, cork, leather, etc. ) reaches a certain concentration in the air, an explosion will occur as soon as an open flame occurs.
4. " Universal patch panel " is more likely to cause fire. The " Universal Patch Panel " has many jacks, and all kinds of plugs can be used. However, the contact area between the contact piece of the patch panel and the electrical plug is too small, and it is easy to overheat the contact piece, resulting in a fire accident.
This will only look at these words, and few people go back and understand that most of the buyers will still choose to buy some of the larger brands, such as Bulls, HuntKey, Philips, breakthroughs, etc., and now the row is still full of more choices. Some time ago it was used as a HuntKey U. Now more and more mobile terminals, to the plug-in board with USB interface, charging directly for mobile devices has become a benchmark. HuntKey U has a USB interface socket.
Small U specifications:
Hole position:
3 -digit +2USB smart interface
full length:
1.8m
Product Size:
253mm×52mm×28mm
Length × width × height
switch:
Master switch
Rated voltage:
250V
Rated current:
10A
rated power:
2500W
USB output:
5V2.1A
Product origin:
China Mainland
Applicable standards:
Domestic standards
Although there is no testing tool, it is still more important to see if the rows are inserted and disassembled.
One piece of copper inside, without protection door. Wire and copper strip solder connections.
Two other USB ports are reserved on the mold. It is estimated that four USB ports will be prepared for the design .
All metal connections are very thick solid copper.
Front view of USB module
Amateur measurement ( ps : may be a bit error)
Conclusion: The quality of the row inserts is generally difficult to determine when buying them. Usually the main thing is to look at the brand. For the brand goods, the quality can be guaranteed, unlike the no-name brand can not bring security. The rest is the price, this Hangjia small U started with 33.9 yuan, the price is still good, not too expensive.