Panasonic Resistor EXB-E10C472J

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.

07/03/2020

Centrifugal Air Compressor Market Growth Factors and Business Development Strategy from 2020-2026 | Atlas Copco, Hitachi Industrial Equipment Systems, General Electric

Global Booster Compressor Market: Industry Analysis and Forecast (2018-2026) – By Cooling Type, Compression Stage, Pressure,End User and Geography Global Booster Compressor Market was value US$ 1.80Bn in 2017 and is expected to reach US$ 3.20Bn by 2026, at a CAGR of 7.46 % during a forecast period.

01/10/2023

5 Refrigeration Solenoid Valve Failures and the Solutions

Refrigeration solenoid valve is an industrial equipment controlled by solenoid. It adjusts mass direction, flow, speed and other parameters in industrial control systems.

06/14/2020

What are the possible reasons for the noise of the air-conditioning compressor

     Compressor noise control is an extremely complex problem. What are the possible reasons for the noise of air-conditioning compressors? Only when the cause is found can the solution be found accordingly.

07/18/2020

The core heart of the chiller-compressor

Power compressor is indispensable when refrigeration equipment is cooling. Such as chillers, chromatography freezers, ice machines, ultra-low temperature refrigerators, etc., their driving force is the refrigeration compressor, the entire refrigerant cycle is the refrigeration compressor

08/02/2020

Basic principles of data center cooling and energy saving solutions

Basic principles of data center cooling and energy saving solutions<br></br> Each data center has its own characteristics, so there is no technical solution that can be applied to any data center.

09/07/2020

The essentials of air compressor selection

When buying an air compressor, in addition to the purchase cost, how to reduce electricity expenses? How to extend the service life of the air compressor? How to provide air pressure smoothly?

09/06/2020

Several suggestions for the field of traditional compressed air purification

In the past, when building a compressed air system, people often ignored the impact of pollutants in the compressed air on the system, and only considered the simple economic factors such as initial investment and operating energy costs,

08/03/2020

New type of solar equipment can be heated and cooled

A recent study by Chinese and American scientists published in the American "Joule" magazine shows that they have developed a new type of equipment that can use the principle of radiant cooling while heating by solar energy. Installing such equipment on the roof helps to save energy.

06/29/2020

Suggestions for troubleshooting of compressor with liquid start