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FAQs Library
Q
How to measure the quality of GD20UL main circuit?
2021-04-15
A

Switching the multimeter to Diode position and test as follows:

1. Set the multimeter to Diode position, connect the black hand with "+", then connect the red hand with R、S、T、U、V、W in order, if all the values is between 0.3--0.5V, both the rectifier and IGBT upper bridge are good. 

2. Contrary, connect the red hand with "--", then connect the black hand with R、S、T、U、V、W in order, if all the values is between 0.3--0.5V, both the rectifier and IGBT lower bridge are good.

If the test values is highly unbalance, the rectifier or the IGBT must be broken. And you can't power on in this situation.

More details, please see the attached file.

Notice: Please make sure that the inverter no power, so we call it static test.

Download

Q
Can a 100kW PCS use lithium batteries less than 100kWh?
2021-04-15
A

Yes, but the battery only supports up to 1C discharge, that is, the discharge power will not be bigger than the battery power. If the battery power is less than the power of the machine, the machine excess power will be wasted.

Q
What is the difference between thyristor switching module and contactor switching module in off grid switching module?
2021-04-15
A

Thyristor switching module can achieve seamless switching, switching time is less than 10ms; Contactor switching module time is longer, there may be adhesion in the switching process. From 2020, the switching modules of PCs products will be upgraded to thyristor switching modules.

Q
In PCS energy storage converter, system what is the difference between with and without transformer?
2021-04-15
A

PCS above 500kW are not equipped with transformers, because in most cases, the power grid will have high-voltage transformers.

Under 500kW, compared with the equipment without power frequency isolation transformer, THDu and THDi are smaller, output characteristics are stable, load adaptability is stronger, and power quality is higher, which is more suitable for industrial applications.

Q
For BD series, what should I do when there is a 31-RTC failure?
2021-04-15
A

Reset the time and date, power off 10 minutes and then start to see if the clock can be real-time timing.

Q
For BD series, how to turn off the grid connection function?
2021-03-31
A

The output power in the grid parameters is set to 0%. If the grid connected power needs to be reduced, this parameter can be modified to the required percentage.

Q
Can BN series working with photovoltaic panels only without batteries?
2021-03-31
A

No, the photovoltaic input can only be used to charge the battery and cannot generate electricity to load.

Q
Does MG/ BG support wake-up diesel generators?
2021-03-31
A

No, there is no internal outpuit terminal for wake up generator.

Q
Can GD5000 be configured with PID?
2021-03-31
A

GD5000 comes standard with built-in PID regulator, which can realize closed-loop control.

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