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FAQs Library
Q
What are the requirements of cooling space and air conditioning for GD35 installation?
2020-12-24
A

According to the power consumption of frequency converter itself, air conditioning is required for use in confined space. Other occasions should be well ventilated.

Q
GD200A how to set parameters for terminal control? What are the relevant parameters?
2020-12-16
A

GD200A can set terminal start, power on automatic operation, automatic fault reset and other functions. Please see the attachment for relevant parameters.
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Q
What is the power consumption of GD20-EU itself?
2020-12-16
A

The power consumption of GD20-EU is around 3-4%.

Q
A004 AC overvoltage
2020-12-16
A

Q: A004 AC overvoltage: after the inverter is connected to the grid or the power generation peak period, the grid voltage exceeds the safety voltage range, causing A004 overvoltage alarm

A: Possible causes:
1. The voltage from the transformer at the connection point is on the high side;
2. There are many photovoltaic power generation equipment on the line, but the line load can not absorb so much energy, and the grid voltage is gradually raised;
3. The cable used from the inverter to the parallel point is longer (L), the wire diameter is smaller (s), and the line resistance is large (r = ρ L / s). When the voltage of the grid point reaches the output of the inverter, the voltage increases △ u = I * r = I * ρ L / s;
4. Several photovoltaic power generation equipment are connected to the same line;

Solutions:
1. Rreducing the output voltage range of the transformer;
2. Reasonably selecting the line diameter and planning the routing path, and connecting the grid nearby to minimize the impact of line loss;
3. If there are more than one inverter equipped near the grid connection point, they can be incorporated into different power supply lines;

Q
What is the difference between -D and -S in MVD GD5000 models?
2020-12-16
A

-D is for double-sided maintenance and -S is for single-sided maintenance.

Q
Does solar pumping controller GD100-PV can drive other kind of motor? Such as compressor.
2020-12-16
A

Yes, but solar power is unstable, may not keep runs 50Hz all the time, so if your speed requirment is lower is acceptable.

Q
When solar pumping controller GD100-PV can't runs to 50Hz, how should we do?
2020-12-08
A

1.Insure solar input total Vmp>=550VDC.
2.When weak light or cloudy is normal.
3.If configuration is no issue,and frequence keep under 50Hz,please contact INVT company.

Q
How long is the service life of GD35's electrolytic capacitor?
2020-12-08
A

It is suggested to replace the electrolytic capacitor after using it for 30,000-40,000 hours.

Q
Why GD20-EU sometimes have leakage current issue?
2020-12-08
A

When using inverter, because IGBT is in high speed switch, the output current has higher harmonic. There is inductance between cable to ground and cable, so leakage current will be generated.

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