What is the voltage of Huaquan low-voltage generator set?

Resposta I.Core

The rated output voltage of Huaquan low-voltage generator sets is 400V/230V (three-phase four-wire system), which is also the standard voltage level for industrial and commercial electricity use in China. among which

• 400V: Three-phase line voltage (between U-V-W phases), used for industrial equipment and high-power loads
• 230V: Single-phase phase voltage (between any phase and the neutral line), used for lighting, equipamento de escritório, and household appliances

Huaquan Power lembra você that Huaquan low-voltage generator sets are suitable for the full power range from 30kW to over 2000kW, making them the most mainstream voltage level of generator sets in the domestic market.

II.Detailed Explanation of Technical Parameters

1. Standard voltage parameters

2. Correspondence between voltage and current of different power units

III. Origin of 400V/230V

Why is it 400V instead of 380V?

The rated voltage of a generator is typically 5% higher than the rated voltage of the power grid to compensate for voltage drops on the transmission lines

• Historical standard: 380V (old national standard)
• Current standard: 400V (IEC international standard)
• The 220V single-phase voltage is also upgraded to 230V

China has adopted the IEC standard since 2003, adjusting the low-voltage distribution voltage from 380V/220V to 400V/230V. Atualmente, Huaquan low-voltage units are uniformly shipped at 400V/230V, which is fully compatible with existing power grids and equipment.

2. Three-phase four-wire Y connection

The Huaquan low-voltage generator set adopts a three-phase four-wire, Y-connection method:

• Three-phase: U, V, W three-phase lines, with phase differences of 120° from each other
• 10: Neutral line (N line), qual, together with the three-phase lines, constitutes a three-phase four-wire system
• Y-connection: One end of the three-phase windings is connected together to form a neutral point, and the other end leads out the phase lines

IV.Comparison between 400V and high-voltage units

Selection suggestions:

• When the load is less than 500 meters away from the generator, a low-voltage unit is sufficient
• If the distance between the load and the generator is greater than 1000 metros, it is recommended to choose a high-voltage unit
• For standalone power > 1000kW: Consider implementing a high-voltage solution to reduce current

V.Voltage quality assurance

1. AVR automatic voltage regulation

The Huaquan low-voltage generator set comes standard with an AVR (Regulador Automático de Tensão), which continuously monitors the output voltage and automatically adjusts the excitation current.

2. Insulation level and protection

VI.Application Scenarios

The Huaquan low-voltage 400V/230V generator set is suitable for the following scenarios:

VII. Common Issues

Q1: Is Huaquan’s low-voltage generator 380V or 400V?

UM: The standard output voltage of Huaquan low-voltage Geradores é 400V/230V (compliant with IEC international standards). This voltage is fully compatible with existing 380V power grids and equipment, because:

• The voltage at the generator outlet is 5% higher than that of the grid, compensating for the voltage drop in the line
• Upon reaching the user end, the voltage has dropped from 400V to approximately 380V
• 380V equipment can operate normally under a 400V power supply

Q2: What is the difference between voltage 400V/230V and 380V/220V?

UM: The two are essentially the same, with only the standard being upgraded.

• Old national standard: 380V/220V (gradually phased out)
• Current standard: 400V/230V (IEC international standard)

Huaquan generators are shipped at 400V/230V, fully compatible with existing power grids and equipment, so there is no need to worry about compatibility issues.

Q3: Can other voltages be customized?

UM: Sure. Huaquan low-voltage generator sets can be customized according to export requirements:

• 440V/254V: United States, some North American regions (60Hz)
• 480V/277V: American Industrial Standard (60Hz)
• 415V/240V: Austrália, some European countries (50Hz)
• 380V/220V: Specific project requirements

When customizing, it is necessary to specify the output voltage, freqüência (50Hz/60Hz), and wiring method.

Q4: Can a 400V generator power a 380V device?

UM: Sim, it is a design convention for the rated voltage of a generator to be 5% higher than the rated voltage of the load. The reasons are as follows:

• Compensate for the voltage drop along the line from the generator to the load
• The longer the line, the greater the voltage drop, and the generator outlet voltage needs to be increased accordingly
• As long as the voltage deviation of the equipment is within ±10% (which is met by most equipment), it can operate normally

VIII. Summary

The rated output voltage of Huaquan low-voltage generator sets is 400V/230V (three-phase four-wire system), covering the full power range from 30kW to over 2000kW. With stable voltage (AVR control, ±1% accuracy) and insulation level H (resistant to high temperatures up to 180℃), it is the most mainstream voltage level of generator sets in the domestic market.

For more technical details or selection advice, please contact Huaquan Power’s customer service