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　　Regulator Technical Parameters ∣ Regulator Parameter Measurements

　　1. The regulator has an input voltage adaptation range. The IEC standard changes the input voltage within ±10% of the rated value. The input range of the company's products is ±20%; maximum ±50%. Exceeding the undervoltage and overvoltage range automatically sounds and sounds the alarm and does not stabilize the output voltage within the required range.

　　2. The output voltage regulation rate is the effect of changes in the output voltage caused by changes in the input voltage. When the load is rated, the input voltage is adjusted from the rated value to the upper limit value and the lower limit value according to the source voltage range, and the measurement output The maximum change in voltage (single phase 220V ± 10%). The smaller the value, the better. It is an important indicator to measure the performance of the AC regulator.

　　3. Load regulation: It is the effect that the change of the load causes the output to change. Change the load current and measure the change in output voltage (±8%). The smaller the value, the better, and it is also an important indicator to measure the performance of the AC regulator.

　　4. Output voltage relative harmonic content (also known as output voltage distortion), usually expressed as THD, is the ratio of the total rms harmonic content to the fundamental rms value. When the load is rated, the input voltage distortion satisfies the reference conditions. When (usually less than 3%), measure the output voltage distortion when the input voltage is at the lowest value, the rated value, and the highest value, whichever is the greater. The smaller the value, the better. (Liwei series voltage regulator is less than 1%; the power regulator has no harmonic content)

　　5. Efficiency: The ratio (percentage) of the active power P0 to the input active power Pi.

　　6. Load power factor. Regulator capacity is expressed in volt-amperes (VA) or kilovolt-amperes (KVA) values. It is the inductive and capacitive load in addition to the pure resistive load in the load, that is, in addition to the active power in the load, there is no Power. This indicator reflects the ability of AC regulated power supplies with inductive and capacitive loads. General AC regulated power supply, load power factor cosφ is 0.8, when the product is 1KVA, the output active power (that is, the ability to carry a resistive load) maximum: 800W. If the product is expressed in 1KW (cosφ is still 0.8) S = 1000/0.8=1250VA. When the value of the load power factor is small, it indicates that the power supply device has a strong ability to adapt to a reactive load.

　　7. The parameters of the AC voltage regulator include output power, input frequency, source frequency effect, random deviation (time drift), no-load input power, and source power. Factors (this value is different from the load power factor, the bigger the better, the maximum is 1), the relative harmonic content of the source current, the audio noise, etc., the three-phase AC regulated power supply, and the unbalanced degree of the three-phase output voltage, etc. The definition of the indicators and test methods can refer to the relevant industry standards.