The MVD with rated current exceeding 72A is equipped with buffer resistance to reduce the impulse current at the moment of closing.
The phase-shifting transformer and the power unit can achieve the isolation of multi-pulse rectifier technology, so that the harmonics generated by rectification cancel each other, so that the harmonics can be controlled within 2%.
Recommanded use float switch sensor,don't support analog sensor.
(1) Measure whether the fan power supply voltage is normal. If the fan power supply is abnormal, repair the fan power supply first;
(2) After confirming that the power supply of the fan is normal, if the fan does not rotate or runs slowly, the fan has failed and needs to be replaced.
This is probably the most common fault in the inverter. First of all, we need to eliminate the fault caused by parameter problems.
For example, current limitation and too short acceleration time may lead to over-current. Then we must judge whether there is something wrong with the current detection circuit, such as Hall sensor, hall cable fault. Whether the output side of inverter is short circuited.
Ordinary motor can realize speed regulation by GD20UL and INVT other series VFD, but it is not recommended to use it under low frequency (30Hz) for a long time to avoid temperature rise.
The poor quality of electrolytic capacitor has the following characteristics: leakage of liquid, high leakage current, high loss, heating, bulging, cracking, combustion caused by explosion, capacity reduction, and increase of internal resistance and inductance. For the filter electrolytic capacitor, because of its high voltage, large capacity and large energy, it is easy to cause leakage, explosion and combustion. Electrolyte is combustible and can cause combustion accident. Therefore, it is necessary to use a good quality electrolytic capacitor and replace it with a new one before reaching its service life.
Standard protection level is IP30, non-standard can meet IP41
Only need to set P15.05 lower frequence of PI output,no need to set P00.05.
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