The high-power voltage regulators we often refer to primarily refer to three-phase AC voltage regulators above 50KVA, mainly including compensating voltage regulators, contactless voltage regulators, and oil-immersed voltage regulators. Next, let's look at how to choose a suitable high-power voltage regulator for yourself?
For those who have previously used high-power voltage regulators, I believe there will be no confusion in making choices, as your past experience with voltage regulation equipment serves as a basis for your rational selection. However, if you are a novice user of voltage regulation equipment, you need to exercise caution in selecting the device. Regardless of the type of voltage regulation equipment, everyone needs to choose according to actual needs. Only by doing so can the selected voltage regulator truly suit our equipment.
Firstly, we need to determine the nature of your actual workload?
Secondly, what is the power of the load?
Thirdly, what about the usage environment?
Fourth, what is the local voltage range?
Finally, based on these current conditions, a high-power voltage regulator suitable for your load device can be selected.
The voltage of your load, the power capacity of the load, and the nature of the load are all fundamental factors in our selection of high-power voltage regulators. Only through the use of voltage regulation equipment suitable for the load can a stable and appropriate voltage be output for your equipment. There are many types of voltage regulation equipment on the market, and only a voltage regulator that is suitable for everyone can reflect good usage connotation. If you have special requirements for using voltage regulation equipment, you can customize special voltage regulation equipment at a formal voltage regulator production institution.
Which high-power voltage regulators can meet your usage standards? Based on your understanding of voltage regulation equipment and everyone's actual voltage regulation requirements, it is the guarantee for everyone to make a rational choice of voltage regulation equipment.
1. Capacity safety factor
An AC regulated power supply is rated based on its apparent power output (kVA). However, in general, loads are not purely resistive, meaning the power factor COSφ is not equal to 1. The actual active power output of the regulator is given by kW = capacity (kVA) × COSφ. Therefore, when selecting a regulated power supply, it is necessary to consider the specific conditions such as the rated power, power factor, and load type of the electrical equipment. The output power should have an appropriate margin, especially for impact loads, where the margin should be even larger. The specific safety factors for selection are shown in the table below
Load characteristics, equipment type, safety factor, and selected regulated power supply capacity
Pure resistive load: Incandescent lamps, resistance wires, electric furnaces, and other equipment. 1.25~1.5 times the total power of the load
Inductive and capacitive loads: fluorescent lamps, fans, motors, water pumps, air conditioners, computers, refrigerators, etc. 2 ~ 3 ≥2~3 times the total power of the load
In environments with high inductive and capacitive loads (such as electric motors and computers), the starting current of the load should be considered to be particularly large (up to 5-8 times the rated current) during model selection. Therefore, the capacity of the voltage regulator should be chosen to be 2.5-3 times the load power.
For example, if one 2.2 kW and one 5.5 kW three-phase motors are used, when selecting a voltage regulator, the capacity should be ≥ (2.2 kW + 5.5 kW) × 2.5 = 19.25 kVA, which means that a three-phase voltage regulator with a capacity of at least SJW-20 kVA or higher should be selected.
2. Output capacity curve of non-compensated regulated power supply
When the input phase voltage of the self-coupling voltage regulator (single-phase 0.5kVA~3kVA, 10k horizontal and below, three-phase 9kVA and below) is lower than 198V, the output capacity begins to decrease; when the input phase voltage is equal to 160V, it decreases to 50% of the rated capacity of the voltage regulator. Therefore, special attention should be paid to reducing load derating at the low end of the power supply voltage to avoid overloading and burning out the voltage regulator;
The self-coupling voltage regulator can simultaneously output two voltages: 220V and 110V. However, even when all outputs are at 110V, the load carried by the voltage regulator should not exceed 50% of its rated capacity; otherwise, it is considered overloaded.
Based on the current majority of computers having a power of 350w, I suggest you consider choosing an 8000w one
