山东变频器维修说到:使用变频器时,不能使用漏电保护器.这是变频器使用的一大原则.有些客户在使用变频器时,为变频器选了相应的漏电保护器.最后的结果是:变频器一起动,漏电保护器就动作,系统根本无法运行.

Shandong Inverter Maintenance said: when using frequency converter, leakage protector must not be used. This is a major principle of frequency converter. Some customers choose the corresponding leakage protector for frequency converter when using frequency converter. The final result is: when the frequency converter works together, leakage protector will act, and the system can not operate at all.

山东变频器维修

Maintenance of Shandong Inverter

漏电保护器的原理是,零序电流为零.而使用变频器时,零序电流不可能为零.

The principle of leakage protector is that zero sequence current is zero. When using frequency converter, zero sequence current cannot be zero.

变频器输出侧为PWM波,电机电缆与大地之间有长电缆的电容效应,使用带屏蔽层的电缆时,电容效应更加明显.

The output side of frequency converter is PWM wave. There is capacitance effect of long cable between motor cable and ground. When using cable with shielding layer, the capacitance effect is more obvious.

山东变频器维修厂家讲在变频器工作时,电容在充放电,有电流通过电容流入大地,并从进线侧的接地线再流回变频器,形成电流回路.如果在进线侧使用了漏电保护器,那么它会动作,切断系统运行.所以不要为你的变频器配漏电保护器了.如果要保证安全,做好设备接地就行了.

Shandong Inverter Maintenance Factory said that when the converter is working, the capacitor is charging and discharging, and the current flows into the earth through the capacitor, and then flows back to the converter from the grounding wire on the input side to form a current loop. If the leakage protector is used on the input side, it will act and cut off the system operation. So don't allocate leakage protector to your converter. Well, if you want to ensure safety, just do a good job of grounding equipment.

配了保护器应该怎么调节:

How should the protector be adjusted?

1、增大设备负载,也就是马达负载,变频器在启动时漏电流就不会很大了.

1. Increase the load of the equipment, that is, the motor load, so the leakage current of the frequency converter will not be very large when it starts.

2、把漏电保护器更换为变频器专用漏电保护器,市面上有卖变频器专用漏电保护器的.

2. Replace the leakage protector with the special leakage protector for frequency converter. There are special leakage protectors for frequency converter on the market.

3、漏电保护器上一般会有一个调节器,把调节器调大即可.

3. There is usually a regulator on the leakage protector. It is enough to adjust the regulator larger.

4、把漏电保护器短接掉.

4. Short disconnect the leakage protector.

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