Banner Sensor SM30SRLCW

01/09/2021

Comfortable Home Green Black Technology

Comfortable Home Green Black Technology Let me talk about the widely used green technology system: 1F ground source heat pump Renewable energy utilization technology, according to legend, it obtains shallow soil energy for heating and cooling, so t器2䀀
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06/14/2020

Commercial central air-conditioning and industrial refrigeration industries are downstream industries of screw refrigeration compressors

Chinese air compressor market has the largest proportion of piston air compressors Chinese air compressors started in the late 1950s and were established and developed after the founding of New China (1949). After roughly digesting and absorbing the prodﰸ2䀀
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08/08/2020

What is the most appropriate setting for the heating temperature of the central air conditioner

What is the most appropriate setting for the heating temperature of the central air conditioner Everyone knows that in the summer, the okmarts.com central air-conditioning temperature is set at 26 to 28 degrees Celsius,

11/25/2021

As 5G is on the Way, Do You Really Understand the Use of HMI?

What is HMI (Human Machine Interface)? This era is smart and full with information. We have already been placed in the age of smart technology and filled with all kinds of new devices and inventions every day.

08/20/2020

What are the protection devices of industrial chillers

Industrial chiller is a kind of water cooling equipment that can provide constant temperature, constant current and constant pressure cooling equipment. The principle of the chiller is to inject a certain amount of water into the internal water tank of thﰸ2䀀

08/13/2022

Introduction of 5 Common Linear Motors

Linear motors (direct drive linear motor), like rotary motors, also have two main application areas: drive and control.

06/14/2020

Danfoss cocuses on providing energy efficient, sustainable and smart refrigeration compressors for a varied range of commercial applications such as cold rooms

08/07/2020

Working principle of frequency converter

　Inverters can be divided into voltage type and current type inverters.<br></br> 　　 Voltage type is an inverter that converts the DC of a voltage source to AC. The filtering of the DC loop is a current type that converts the DC of the current source to AŒ

09/30/2022

Three Control Methods of Servo Motor

There are three types of <strong>servo motor control</strong> modes (<strong>servo motor control techniques</strong>)

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.