NACHI Piston Pump PVS-0B-8N1-30-Q64
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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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06/14/2020
How much future does using water as refrigerant
How much future does using water as refrigerant Refrigeration technology is always developing in the direction of high efficiency and environmental protection, but is it very futuristic to use water as a refrigerant?
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08/13/2020
Compressor in the industrial chiller system produces wet stroke fault and troubleshooting
In the industrial chiller system, when the compressor sucks in wet steam, frost occurs on the cylinder wall, and the suction temperature and discharge temperature drop significantly. This is the wet stroke of the compressor, commonly known as frost.
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09/05/2020
What is a gas source system What are its components
A system composed of equipment that generates, processes, and stores compressed air is called an air source system. A typical air source system usually consists of the following parts: air compressor,
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Due to the shortage of energy supply, and increasingly significant environmental problems, new energy resources have been gradually known to people. Wind energy is a type of renewable clean energy.
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07/31/2020
Common problems and solutions of industrial chillers summarized by the maintenance master
1. Water leakage (first determine the location of the water leakage)<br></br> 1. Water leakage from the pump (causes: the shaft seal at the water pump is not well connected or the shaft seal has been damaged)
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09/16/2020
Application skills of air compressor using oil and gas separator
Abstract: The application technical requirements of the oil-gas separation core used in air compressors, and the problems that occur during the use of the oil-gas separation core are analyzed, and the matters to be noted before installation.
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09/22/2020
Energy saving, the key to compressor selection
When buying a compressor, the energy consumption cost of the compressor is crucial. There are many energy-saving measures that are feasible. Ensure that replaceable parts can be easily repaired.
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06/13/2020
How to configure the cold storage refrigeration equipment
How to configure the cold storage refrigeration equipment How to configure the cold storage refrigeration equipment? As a total solution provider for cold storage, Sike Refrigeration has rich experience in the installation of cold storage refrigeration e 器2 䀀 ᅵ皥 䖒皦즠Ʋ煔क़ 㲈Ʋ 䌁皦 ᮔDž༬皧煞क़Ѐ 呄ᠾ鹨់༹皧 ࠄ 00령ꐱ