How to Select a Regulated Power Supply for Instruments
With the rapid development of China's industry, various electronic appliances are widely used in various industries. However, electronic appliances generate a large amount of harmonics during use, which inevitably cause interference to the power grid after returning to it, resulting in power grid pollution. Such electronic appliances, such as computers, monitoring systems, small communication equipment, automation equipment, and some UPS power supplies, will also generate harmonic interference. In addition, any analytical instrument that uses high voltage for metallographic analysis generates high voltage through double voltage rectification. The load of double voltage rectification type has a highly distorted bell shaped pulse wave input current, with an opening angle of about 60 ° and an input power factor PF ≈ 0.65. However, the amplitude of the input current is very high, producing a large number of 3rd, 5th... odd harmonics. If returned to the power grid, it will cause mutual interference between adjacent equipment, especially causing serious interference to the normal operation of the analytical instrument.
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 harmonic interference and other power grid pollution, as well as lightning strikes. There are not many voltage regulators that need to have the above comprehensive functions. However, the Sanke brand parameter voltage regulator is outstanding in this regard, and it has been widely used in applications such as the United States Thermal Power, Lico PE, Agilent, Shimadzu and Horiba from Japan, JY from France, Nak from Beijing, Supra, Spike from Germany, Toledo scales and other supporting power supplies.
When designing the Sanke brand AC parameter voltage regulator, full consideration was given to the need for a wide voltage regulation range, high voltage regulation accuracy, short response time, minimal output voltage waveform distortion, bidirectional anti-interference ability, automatic protection against load short circuits, isolation, filtering and shaping, and the ability to withstand double the power supply voltage without overvoltage output. The Sanke brand AC parameter voltage regulator is a narrowband filter with a frequency of 50HZ, which can prevent peak interference, harmonic interference, high-frequency interference, and lightning interference from entering the equipment on the power grid. The harmonics generated by the analysis instrument will not return to the power grid and will not interfere with each other.
In terms of lightning resistance, products with a voltage of 15KVA or above have lightning protection capabilities of up to 6000V. Through the lightning strike of the Sanke brand AC parameter stabilizer, a large lightning current of 40KVA can be discharged to the ground, achieving the purpose of current and voltage limiting, thereby protecting electrical equipment. In terms of lightning protection applications, broadcasting, television, and mobile communication are used in harsh environments, many of which are on mountaintops or rooftops, where the risk of lightning strikes is extremely high. And Sanke brand AC parameter voltage regulators have been serving these industries for many years. Sometimes, after being struck by strong lightning, the input wire package of the voltage regulator is blown up by lightning, but the electrical equipment behind it will not be damaged.
