As we all know, the ideal power supply environment we hope to obtain is that the power supply grid system can provide us with stable voltage. When we encounter a temporary drop or drop in voltage (usually a sudden drop, it returns to normal in a short period of time). That is to say, the phenomenon that the effective value of the supply voltage suddenly drops and then rises and recovers in a short period of time. The International Institute of Electrical and Electronics Engineers (IEEE) defines voltage sag as the rapid drop of the effective value of the supply voltage to 90% to 10% of the rated value. %, and then rise back to near the normal value, the duration is 10ms~1min. Once a voltage sag occurs, it will bring great harm to the industry. Because voltage sag is regarded as the most harmful power quality problem to industrial production.
In general, voltage sag will affect all electrical equipment connected to the circuit. Especially for those manufacturing and processing industries that require high precision, once a voltage sag is encountered, it will easily cause loss and waste of precision products. More seriously, it even leads to a large amount of raw materials becoming unusable. It is also a great hazard to the life of electrical equipment. At the same time, the voltage sag will also cause a large number of harmonics.
Most industries now use automated or semi-automated equipment. Voltage sag can lead to misjudgment of automatic or semi-automatic devices. Whether it caused a pause or a malfunction. All may cause the frequency converter to stop, and even cause various voltage protection devices to start. There are various types of motors that are common in daily life. For example, elevators and TVs will pause and cause the motor to restart suddenly.
When these electrical equipment cannot operate normally, due to a sudden occurrence, the entire production line will be interrupted. When we need an orderly restoration of the entire production line. It is equivalent to increasing the time cost and labor cost in vain. Especially for those places that have requirements on delivery and production dates.
What impact will it have on daily life? The most intuitive feeling is that it will cause harm to the computer system, which will easily cause shutdown and data loss (the computer will shut down directly, no matter how many words you have typed and sorted out, it will be too late to save due to sudden shutdown). Especially those very important places, such as hospital equipment, traffic command system and so on. Very simple example. The operating room of the hospital is undergoing surgery. If there is a voltage sag, whether it is a shadowless lamp or some very sophisticated instruments, once it is turned off and restarted, it will have a great impact on the operation. This kind of failure caused by the accident of the instrument is unacceptable to everyone.
For refrigeration electronic controllers, once a voltage sag occurs, the controller will cut off the refrigeration motor. For the chip manufacturing industry, once the voltage is lower than 85%, it will cause the electronic circuit to malfunction.
The sensitive industry voltage sag control device produced by Hongyan Electric can effectively solve a series of consequences caused by voltage sag. HY series sensitive industry voltage sag control equipment – product superiority in: high reliability, specially designed for industrial loads, high system efficiency, fast response, superior rectifier performance, no harmonic injection, full digital based on DSP Control technology, high reliability, advanced parallel expansion function, modular design, multi-function with graphic TFT true color display.
Post time: Apr-13-2023