The inverter drops the feed switch when it is running, and the inverter has a special feed switch pr

Personally, I think that the possibility of protection caused by leakage and short circuit is relatively small, and it should be due to the large starting current that it causes tripping.

I suggest that you can choose a larger feed switch, because there is a frequency converter, so the feed switch does not need to be too small, at least not less than the frequency converter protection value.

Bad IGBT module and driver board will cause an imbalance in the output voltage, which will also cause short-circuit protection [measure the output of the inverter].

It should be leakage, and the leakage switch current must be more than 500mA for the inverter, and look at your feed switch current.

In fact, the feed switch is a protection device between the transformer and the electrical machine, the inverter outputs higher harmonics, and the leakage current is larger than the conventional, so the conventional leakage switch is easy to trip, and the leakage switch with large specifications or special type must be used. If the leakage current protection value of the leakage switch of the inverter cannot be selected as 30mA, the leakage protector of 200mA ---300mA should be selected, or the leakage protector should not be installed.

The inverter is generally an electric energy control device that uses the on-off effect of power semiconductor devices to convert the power supply into another frequency. The main circuit of the inverter can be roughly divided into two categories: the voltage type is the inverter that converts the DC of the voltage source into AC, and the filter of the DC loop is capacitor; The current type is an inverter that converts the DC of the current source into AC, and its DC loop filter is an inductor.

The principle of special feed switch for left and right inverters: the special feed switch for inverter is a special switch, which is mainly used to control the input power supply of the inverter. Here's how it works:

By controlling the opening and closing of the switch, the input power supply of the inverter can be controlled. When the feed switch is turned on, the input power supply of the inverter will be connected to the power supply, and the inverter can work normally; When the feed switch is turned off, the input power supply of the inverter will be disconnected, and the inverter will stop working. Therefore, the special feed switch of the inverter can effectively control the input power supply of the inverter, so as to improve the working efficiency and service life of the inverter.

Will the inverter burn when the inverter is loaded? Hello dear,!"After the inverter is powered off, the power transmission burns out, because the voltage stabilizing device in the inverter does not work, so it causes the instantaneous current overload to be too large once, resulting in burning, and the voltage stabilizing equipment should be inspected and repaired.

It is not allowed to cut off the power like this, and the control terminal of the inverter should be shut down. Many inverters are clearly stipulated that it is not allowed to disconnect the power supply of the inverter to achieve the purpose of stopping, the reason is that the inverter is short of socks every time the inverter is powered off and then powered on, the large capacitance in the inverter will be charged once through the charging resistor, and the frequent power failure and power-on are easy to burn the charging resistance inside the inverter. For example, ABB's inverter clearly stipulates that the inverter power supply can only be powered on 6 times at most in an hour.

In order to ensure that the inverter can be reliably powered off in an emergency, an incoming contactor can be set at the inlet end of the inverter. During normal operation, the terminal is controlled by the inverter to stop; In case of emergency, the incoming contactor is directly disconnected, so that the design is reasonable. Hope it helps!

In most cases, the inverter hardware is faulty, of course, this needs to first check whether the power supply voltage used by the inverter is stable. If the supply voltage is stable, it is almost certain that it is 99% of the time that it is a hardware failure.

There is another situation, we need to consider, that is, there are large harmonic sources around the inverter, for example, high-power inverter, intermediate frequency furnace, welding machine, UPS and other equipment, the harmonics generated by it are injected into the power grid, which may lead to the false alarm of the inverter, if this is the case, it is easy to do, first do a good job of grounding the inverter, if not, you can add the inverter input filter, or the inverter input reactor for filtering.