Frequency conversion power maintenance, maintenance need to pay attention to the problem

In the customers we have seen,when using frequency conversion power supply(CNZGys),the maintenance of frequency conversion power supply is not a lot,generally is to wipe the outside of the chassis,the ground around the chassis cleaning and so on.In fact,frequency conversion power supply(CNZGYS)maintenance,maintenance is very necessary:

First:it can increase the service life of variable frequency power supply(CNZGys).Originally,a variable frequency power supply(CNZGYS)can be used for 8 years.If your company's variable frequency power supply(CNZGys)is maintained and maintained well,it can be used for several years.In terms of the value of this variable frequency power supply(CNZGys),the service life is long,the cost is reduced,so the value of this variable frequency power supply(CNZGys)is improved.

Second:keep the frequency conversion power supply(CNZGys)stable use,not easy to break down.For example,some of the frequency conversion power supply(CNZGys)like Yangsheng in The use of 8-10 years later,has not been able to carry the full load.Especially when the load type is inductive load,there is a surge current when starting,at the beginning of the time can be directly at least,a long time will not be able to start so many equipment at once.If it is good maintenance,the time of this situation will be relatively late.

Here is how to maintain frequency conversion power supply(CNZGYS):

Time:It is recommended that periodic examinations should be carried out once a year.

Replacement of spare parts of frequency conversion power supply(CNZGys)

Frequency conversion power supply(CNZGys)consists of a variety of components,some of which will gradually reduce their performance and aging after long-term work,which is also the main reason for frequency converter failure,in order to ensure the long-term normal operation of the equipment,the following components should be replaced regularly:

1.Maintenance of cooling fan,which is related to the heat dissipation of frequency conversion power supply(CNZGys),especially in summer,the weather is hot,pay more attention to the heat dissipation problem.Frequency conversion power supply(CNZGys)power module is the most serious heating device,the heat generated by its continuous work must be discharged in time,the life of the general frequency conversion power supply(CNZGys)cooling fan is about 10KH-40KH.According to the frequency conversion power supply(CNZGys)continuous operation converted to 2-3 years to replace a fan,direct cooling fan has two and three points,two line fan one line is positive,the other line is negative,do not replace the wrong;In addition to the positive and negative poles of the three-line fan,there is a detection line,pay attention to the replacement,otherwise it will cause the frequency conversion power supply(CNZGys)overheating alarm.Ac fans are generally divided into 220V and 380V,and the voltage level should not be mistaken when replacing them.

2.Filter capacitor,ensure the normal output of frequency conversion power supply(CNZGys),voltage,sine wave stability.

The filter capacitor of the intermediate circuit:also known as electrolytic capacitor,its main role is to smooth the DC voltage,absorb the low frequency harmonics in the DC,the heat generated by its continuous work and the heat generated by the frequency conversion power supply(CNZGys)itself will accelerate the drying of its electrolyte,directly affecting the size of its capacity.The normal service life of the capacitor is 5 years.It is recommended to check the capacity of the capacitor periodically once a year,and replace the capacitor if the capacity is reduced by more than 20%.

Notes for use of variable frequency power supply(CNZGys)

1,high pressure test please pay attention to safety,strictly in accordance with the specification of high pressure test to operate.Please shut down the system and cut off the power supply before checking/modifying the test wiring.

2.According to the highest voltage of frequency conversion power supply(CNZGys),the actual high voltage can be raised to is determined by the excitation transformer,and the appropriate excitation transformer can be replaced according to the test voltage.

3.If the transformer makes abnormal sound after starting up,please immediately shut down the system and cut off the power supply to check whether the transformer wiring is correct.

4,normal"stop"adopts the way of step-down stop,protection stop direct quick stop,in case of emergency can directly disconnect the air switch directly shut down.

5.If the automatic frequency sweep fails,check the cable connection or reset the frequency sweep range.

Clean and maintain

Clean air filter cooling air duct and dust inside.Check whether screws,bolts and plug-ins are loose,and whether the ground and phase resistance of input and output reactors is short-circuit.Normally,it should be more than tens of megohm.Conductors and insulators should be cleaned with alcohol in time.