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06/20/2020
What are the causes of air conditioning trip
What are the causes of air conditioning trip 1. The contradiction between the rated current of the air conditioner and the current carrying capacity of the wire. Here are two formulas involved: ①The rated current of air conditioner I=P÷U ÷power factor, the power remains unchanged, the smaller the voltage, the greater the current required. ② The current carrying capacity of the wire I=U÷R, the voltage is proportional to the current. So when the power supply voltage is normal, we must consider the line voltage drop. The longer the line, the greater the resistance, the greater the voltage drop, and the smaller the output current at the end. However, because the power of the load remains unchanged, the voltage becomes smaller, and the current that needs to be output will be larger. At this time, the wire is forced to overload, and the time will cause heating, and eventually cause the tripping of the open circuit. Some friends said that the heat of the wire will not cause the tripping of the circuit breaker. In fact, the manufacturer of the air switch has made it clear in the relevant manuals that the heat of the wire will cause the air switch to trip. Because the wire heats up, the crimp terminal will also heat up, and the resistance will become larger and larger. The larger the resistance, the greater the current consumption, and the hotter it will be, a vicious cycle. 2. Leakage During the daily maintenance work, we will encounter the situation that the air circuit trips due to the leakage of electricity. At least I have not experienced it once or twice. Regardless of the leakage of the neutral line or the leakage of the live line, a long time will cause the circuit breaker to trip. Why does the electric leakage cause the MCB to trip? There are two situations. ① Good grounding. At the beginning, the leakage current was not large, and as time went by, the leakage current became larger and larger, and eventually evolved into a short circuit to ground, unable to close. ②There is no ground wire. If the equipment is not connected to the protective ground, when the wire leaks to the equipment, it is equivalent to adding a large shunt resistance. Like this problem, if the air conditioner does not have a ground wire, when the wire leaks to the air conditioner, the air conditioner is a very large shunt resistor and will consume a lot of current. Eventually, the wire will heat up or trip open. How to determine whether the trip caused by the above two aspects can be done with a clamp ammeter. ① Measure the voltage at the input and output to see if there is a significant change in voltage drop. ②Measure whether the output current exceeds the standard. So my suggestion is: first measure the supply voltage to see if it is within the allowable fluctuation range. Then measure the current to see if it exceeds the rated ampacity of the wire. Finally, check the data one by one according to the measured data to find out the reason.
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07/16/2020
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Five damage situations known to the compressor
Five damage situations known to the compressor Air conditioning has always been an indispensable "good companion" to accompany the hot summer! The reason the air conditioner can bring us cool is because of its internal compressor. If the air conditioner is used more and more frequently, then its internal compressor is prone to malfunction or even damage.
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09/11/2020
Silent air compressor, oil-free air compressor
There are many types of manufacturers and sales. According to the air quality requirements, they can be basically divided into oil lubrication and oil-free lubrication. Here the author focuses on the purchase of oil-free air compressors.
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06/14/2020
The domestic compressor industry should maintain a stable production volume
In recent years, the voice of energy conservation and emission reduction has been increasing day by day, which has forced domestic compressor companies to accelerate the pace of technological upgrades, which shows the pressure of industry development. Bas ﰸ2 䀀 ᅵ皥 䖒皦즠Ʋ娼ི 㲈Ʋ 䌁皦隆 ᮔDž༬皧婆ིЀ 呄ᠾ鹨់༹皧 ࠄ 00븹먱댁珵理뛐珵Љ 䕄ྦ 뤂ᐱ變뚜珵 ᴴᏩ呄ᠾ퍘ᒥ 鹨់變ᩄ ꋔྦ 瑉浥 巠皱㙲皦抐皱 巠皱 ੨皦柘皱 ᅵ皥 ب 巠皱㙲皦忈皱 ੨皦柘皱 즠Ʋǜ 勁皦즠Ʋب ǜ V / 펔B䌁皦 ᮔDž '鱤džቜ먢䇨珵呈ᠾ뤂ᐱ ⬿먲僧ᐱ靖㥲ᐲ�僬㣢ᐲ ᠾ 靖랖僧࡞ ﯼ靖 �僬㣢ᐲ 臆S㥲ᐲ ᬄğ ﯼ戴 ﯤ艏S練杴 ﯼ杴 㥲ᐲ 蒠Sﯼﰸ ﲨ 囬
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08/05/2020
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When doing intelligent and informatized projects, it is inevitable to do computer room projects. Air-conditioning is inevitable for computer room engineering. Some people will say that the cost of precision air-conditioning is so high.
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