Main technical parameters of voltage stabilizer

1、 The voltage regulator has an input voltage adaptation range. The IEC standard states that the input voltage varies within ± 10% of the rated value. The input range of the company's products is ± 20%; The maximum tolerance is ± 50%. Exceeding the range of undervoltage and overvoltage will automatically sound and light an alarm, and the output voltage cannot be stabilized within the required range.

2、 The output voltage adjustment rate is the effect of the change in output quantity caused by the change in input voltage. When the load is at the rated value, the input voltage is raised from the rated value to the upper limit value and lower limit value according to the source voltage range, and the maximum change in output voltage is measured (single-phase 220V ± 10%). The smaller the value, the better, which is an important indicator for measuring the performance of AC voltage regulators.

3、 Load adjustment rate: It is the effect of changes in output caused by changes in load. Change the magnitude of the load current and measure the change in output voltage (± 8%). The smaller the value, the better, and it is also an important indicator for measuring the performance of AC voltage regulators.

4、 The relative harmonic content (also known as output voltage distortion) of the output voltage, usually expressed as THD, is the ratio of the total effective value of the harmonic content to the fundamental effective value. When the load is at the rated value and the input voltage distortion meets the reference conditions (generally less than 3%), the output voltage distortion is measured when the input voltage is at the lowest, rated, and highest values, and the highest value is taken. The smaller the value, the better. (Jingyuan Technology series voltage regulators are less than 1%; among them, power regulators have no harmonic content)

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

6、 Load power factor. The capacity of the voltage regulator is expressed in terms of volt ampere (VA) or kilovolt ampere (KVA) values, which refers to the presence of inductive and capacitive loads in addition to pure resistive loads in the load, that is, in addition to active power, there is also reactive power in the load. This pointer reflects the ability of AC regulated power supplies to carry inductive and capacitive loads. General AC stabilized power supply, load power factor cos φ When the product is 1KVA, the maximum output active power (i.e. the capacity with resistive load) is 800W. If the product is expressed in 1KW (cos) φ Still at 0.8, it can output active power of 1KW, and at this time, the output power S=1000/0.8=1250VA. When the load power factor value is small, it indicates that the power supply equipment has a strong ability to adapt to reactive loads.

7、 The parameters of an AC voltage regulator include output power, input frequency, source frequency effect, random deviation (time drift), no-load input power, source power factor (this value is different from the load power factor, the larger the better, the maximum is 1), relative harmonic content of source current, audio noise, etc., three-phase AC voltage regulator, as well as three-phase output voltage imbalance, The definition and testing methods of these indicators can refer to relevant industry standards for details.