SKF Bearing 51107

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.

08/19/2020

Inspection and Repair Method for Leakage of Air Conditioning Refrigeration System

The refrigeration system of a split air conditioner consists of a compressor, a condenser, a four-way reversing valve, a throttle, and an evaporator. Then, what if the air conditioner refrigeration system leaks? Come to okmarts.com today to find out more!

08/09/2020

How to judge the new and old refrigeration compressors

After we buy the chiller, how to judge the old and new problems of the compressor? This requires the accumulation of professional knowledge. Therefore, in view of this, users should master some knowledge about industrial chillers.

09/01/2021

What is VFD?

A VFD (Variable-frequency Drive, frequency converter) is a power control device that uses frequency conversion technology

08/17/2020

Precautions for the safe use of chillers

In order to ensure the safe operation of the chiller and protect the personal safety of the staff, the operator must be familiar with the knowledge of the safety management of the chiller. Please read it carefully before using the chiller.

07/13/2020

Danfoss H series high temperature air conditioning compressor

compressor trading platform Self-operated inventory, lightning delivery within 7 days! okmarts.com has more than 70,000 square meters of warehouse, using modern small warehouse management technology, all goods are sold in stock, lightning delivery within 7 days.

08/21/2020

Tips on Air Conditioning Extension Tube

Many friends know that if the air conditioner is installed, there will be an extra charge, and this fee does not seem to be low, but you don’t know that after the air conditioner connecting pipe is extended to a certain distance,

03/29/2022

What is a Linear Guideway?

Linear guideway, also known as linear guide rail, slide rail, linear guide and linear slide rail, is used for high-precision or high-speed linear reciprocating motion. It can bear a certain torque and realize high-precision linear motion under high load.

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

06/14/2020

Basic knowledge of central air conditioning

Basic knowledge of central air conditioning 1. Basic knowledge of central air conditioning 1. What is refrigerant and what is its working principle? A working substance that transfers heat between the object to be cooled and the environmental mediu器2䀀
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