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FAQs Library
Q
Why the pump water flow is lower, after removed the capacitor?
2021-03-24
A

As the single-phase motor contains the starting capacitor, the start-up capacitor is designed to generate a 90-degree phase difference between the primary and secondary windings of the single-phase motor, resulting in a rotating magnetic field to rotate the motor. The size of the starting capacitor is generally designed according to the frequency 50Hz, but when the single-phase motor frequency control, the frequency will not always work at 50Hz, it is difficult to produce rotating magnetic field, the common method is to remove the single-phase motor start and run Capacitor, the use of two-phase control method.

After adopt the method of removing the capacitor, the software algorithm improvements, it is necessary to ensure that limit the starting current, but also to ensure that the starting torque, so the final output voltage than the direct start voltage amplitude is low, resulting in load capacity decreased.

Q
How does GD300-01A control the cooling fan of the air compressor?
2021-03-17
A

It can provide variable frequency control and power frequency control. Variable frequency control requires a corresponding power VFD to control the cooling fan; power frequency control uses the GD300-1A relay output to control the start and stop of the fan. The start and stop temperature of the fan can be set on the HMI.

Q
What is the overload capacity of GD300-21?
2021-03-17
A

The overload capacity of the GD300-21 main motor is 150% for 1 minute and 120% can run continuously. The fan motor overload capacity is 120% for 1 minute.

Q
In the HVAC industry, how does the fire override mode work?
2021-03-17
A

The signal of the smoke sensor is connected to the inverter. When a fire occurs, the inverter detects that the signal of the smoke sensor is valid. According to the set fire mode, it can run until the set frequency to extract smoke until the inverter is damaged.

Q
Is there a standard cabinet for GD3000 VFD?
2021-03-10
A

For VFD below 660V, we recommend that customers choose low-voltage general cabinets. 1140V and 3300V products can provide IP20 standard cabinets.

Q
The voltage level of the GD1000 series and the voltage level of the GD3000 series can both meet 1140V.
2021-03-04
A

GD1000 is a special VFD designed for coal mining machines. The main applications are coal mining machines, continuous mining machines, shuttle cars and other traction loads.

Q
The water pump already runs, why is there no water coming out of the pipe?
2021-03-04
A

1. Check the pump running direction is reversed or not, power off, and exchange U and W cable can change the direction.
2. Some centrifugal pumps need to be filled with water before work properly.
3. The pump head is proportional to the square of the frequency.if the output frequency is too low, it will cause the head of the pump to drop, resulting in not water. it needs to add the solar panel power, and set P15.05 output lower limit frequency.

Q
Will the protection level be affected after the BPD opens the cover?
2021-03-04
A

After the BPD is removed the cover to repaired, the protection level will decrease. When installing it again, you need to check whether the waterproof tape is intact, and apply appropriate waterproof glue on the four corners to ensure good sealing.

Q
What special air compressor functions does GD300-0A have?
2021-02-25
A

Sleep and wake-up function, constant voltage control, constant temperature control, component maintenance, hardware lack phase detection, phase sequence detection, fan overload protection, fan current imbalance protection, etc.

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