Does the variable frequency power supply interfere with the signal?
　　Have you noticed that using a variable frequency power supply can cause some interference to the communication system?
　　When odd low frequency harmonic currents with large amplitudes flow through communication lines and are coupled through magnetic fields,interference voltage will be generated in adjacent power lines,interfering with the operation of communication systems.In addition to affecting the clarity of communication lines,in extreme cases,it will also threaten the safety of communication equipment and maintenance personnel.
　　If there is a fault with no input power supply in the variable frequency power supply,the following troubleshooting methods can be referred to:
　　1.Is the input of the mains switch turned on?Check if the input power is locked and plugged in properly Does the specification of the input voltage meet the rated specifications?Check if the fuse has been blown?When the above problems occur,everyone can first rule out the above possibilities one by one according to these points.
　　For harmonics in variable frequency power supplies,power harmonics often cause relay protection and automatic devices to malfunction or refuse to operate,and then their reliability will also decrease.If this situation occurs,it is easy to cause system accidents,which can seriously threaten the safe operation of the power system.
　　So,this comes to the environmental issue of variable frequency power supplies,because when operating in unsuitable or interfering environments,variable frequency power supplies can more or less affect the machine,which inevitably leads to machine failures.
　　The following are the requirements and precautions for the variable frequency power supply environment:
　　1.If conditions permit,a small sound and light alarm device for steam leakage or power outage can be installed to detect and solve problems in a timely manner,ensuring that the machine does not malfunction.
　　2.The inspection measures are carried out by the regional instrument maintenance responsible person according to the predetermined inspection route for regular inspections.During the inspection,it is necessary to check whether the insulation pipeline valves are normal,whether the insulation box is normal,whether the drainage device is normal,whether the insulation material packaging is intact,and whether the electrical heating and power supply components are normal.
　　3.Choose a suitable installation location:dry,rainless,and at a suitable temperature.