How to choose a regulated power supply for the instrument
With the rapid development of my country's industry, all walks of life use a large number of electronic appliances, and electronic appliances will generate a large number of harmonics in the process of use, which will inevitably bring interference to the grid after returning to the grid and form grid pollution. Class electronic appliances such as computers, monitoring systems, small communication equipment, automation equipment and some UPS power sources will generate harmonic interference. In addition, for all analytical instruments that use high voltage for metallographic analysis, the high voltage is generated by voltage doubler rectification, voltage doubler rectification type load, and its input current is a stalactite-shaped pulse wave with great distortion, and the opening angle is about 60° , the input power factor PF ≈ 0.65, but the amplitude of the input current is very high, resulting in a large number of 3rd, 5th... odd harmonics, if returned to the power grid, it will form mutual interference with adjacent equipment, especially for the normal operation of analytical instruments Serious disruption to work.
To provide power for analytical instruments, in addition to having high voltage regulation accuracy and a large voltage regulation range, it is also necessary to resist grid pollution such as harmonic interference and anti-lightning strikes. There are not many voltage stabilizers that have the above comprehensive functions. The Sanke brand parametric regulator is the best in this respect, it has been widely used in such as: American thermoelectric, Leco, PE, Agilent, Japan Shimadzu, Horiba, France JY, Beijing Nanoco, super spectrum, German Spike, Toledo weighing instruments and other supporting power supplies.
When designing the AC parametric voltage stabilizer, it is fully considered that it must have a wide range of voltage regulation, high voltage regulation accuracy, short response time, small output voltage waveform distortion, two-way anti-interference ability and load short-circuit automatic protection, Special functions such as isolation, filter shaping, and must be able to withstand twice the power supply voltage impact without overvoltage output. The Sanke brand AC parameter voltage stabilizer is a narrow-band filter with a frequency selection of 50HZ. It is aimed at the peak interference on the power grid. Harmonic interference, high-frequency interference, and lightning interference cannot enter the equipment through it. The harmonics generated by the analysis instrument will not return to the power grid and will not interfere with each other.
In terms of anti-lightning strike, the products above 15KVA can achieve safe lightning protection (6000V) in terms of lightning protection ability. Through the lightning strike of Sanke AC parameter stabilizer, the large lightning current 40KVA can be discharged into the ground. To achieve the purpose of current limiting and voltage limiting, thereby protecting electrical equipment. In the application of lightning protection, the use environment of radio, television and mobile communication is relatively harsh. Many of these use occasions are on the top of mountains and buildings, and the risk of being attacked by lightning is very high. The Sanke brand AC parametric voltage stabilizer has been serving these industries for many years. Sometimes, after a strong lightning strike, the lightning will blow up the input line of the voltage stabilizer, but the electrical equipment behind it will not be damaged.
In addition, the three-column core stabilized transformer of the AC parameter stabilizer has three-column magnetic fluxes that are complementary, so the three-phase line voltage and phase voltage are relatively balanced. When the input three-phase is 10% unbalanced or the load is 10% unbalanced , A total of three-phase output is still relatively balanced, unbalanced ≤ 3%. After proper debugging, the input terminal of Sanke AC parametric voltage stabilizer can be used as reactive power compensation for power transmission lines, and its output terminal can be used as capacitive reactive power compensation for equipment, and its power factor is ≥0.95.
