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Holip VFD Frequency Converter HLPNV0D3721B
There is no price at present, you can Request a Quote
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Recent related posts
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03/05/2021
Precautions for use and installation
Ambient temperature of servo driver. 1) Operating temperature: - 10 ℃ ~ + 40 ℃; (2) storage temperature: - 25 ℃ ~ + 65 ℃; (3) ambient humidity: 5% ~ 90%, no condensation; (4) vibration / shock: vibration is 0.5g (4.9M / S2), shock is 2G (19.6m / S2).
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06/19/2020
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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08/03/2020
14 moving pictures show various air-conditioning compressors, hurry up and collect them
The compressor is the low pressure gas<br></br> A driven fluid machine that is upgraded to high-pressure gas. It is the heart of the refrigeration system and provides power for refrigeration.
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06/24/2022
6 Common Faults of Encoder?
If motion control is important to your production, then your encoder is one of the keys to your success. Encoders are exposed to shock, contaminants/oil, excess vibration, moisture
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01/11/2023
Common Directional Control Valve Failures and the Solutions
In the process of using the directional control valve, various failures may occur in the slide valve, electromagnet, and reversing valve.
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08/19/2020
The difference between chilled water, cooling water and condensed water and the principle of refrigeration
The central air-conditioning host is composed of a compressor, an evaporator, a condenser, and a throttle valve. The compressor provides energy. The condenser reduces the temperature of the refrigerant from the compressor.
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08/15/2023
What are the Pros and Cons of Heat Pumps
Heat pumps are a popular alternative to traditional heating and cooling systems. They work by transferring heat from one location to another, providing both warmth in the winter and coolness in the summer.
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06/13/2020
Do you know question and answer with refrigeration compressors?
1. Why control the impurity content and moisture content of the compressor and air conditioning system?
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09/04/2020
Have you considered these four questions when using screw air compressors
When using a screw air compressor, have you considered these four issues: the speed of the screw air compressor, the working temperature of the screw air compressor, the lubrication method of the screw air compressor, and the use environment of the screw air compressor.
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06/29/2020
What are the causes treatment and prevention methods of compressor liquid blow
What are the causes, treatment and prevention methods of compressor liquid blow Liquid blow means that the refrigerant liquid or wet steam is sucked into the compressor by the compressor due to failure or insufficient absorption of heat, which is called liquid blow. First, the main reasons are as follows: