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I hope to help you better understand 10 kW ups, ups system.
According to the working mode of uninterrupted UPS power supply, it can be divided into ON-line UPS and off-line UPS. Off-line UPS, also known as the various UPS, can also be divided into sine wave output, square wave output, with or without voltage regulation.
After the various UPS, all kinds of UPS means that the inverter in the UPS only works in the state of commercial power interruption or Undervoltage abnormality (Undervoltage value is about 170V, that is, UPS investment voltage), and supplies power to the load. The inverter does not work and is in various states.
After all kinds of UPS power flow chart. When the mains supply is normal, the mains is directly passed through the AC bypass branch switch and output to the load via the filter. On the other hand, through the power transformer, it is rectified to become DC, and then charged to the battery pack via the charging circuit. When the mains supply is interrupted, the stored energy of the battery is converted into alternating current through the inverter, and the filter continues to supply power to the load.
UPS power supply
In the latter UPS, the actual circuit also contains various control loops such as protection and alarm, which is more complicated.
Online UPS energy flow chart. When the mains supply is normal after the mains pass through the power transformer and the rectifier, the inverter is output to the load through the inverter and the filter; the other is charged to the battery pack via the charging circuit. When the mains supply is interrupted, the battery terminal voltage is lower than the set value or the inverter is faulty, the mains supply power to the load through the bypass switch via the changeover switch and filter. It can be seen that the inverter of the online UPS is always working regardless of whether the mains is normal or interrupted.
The main components of the UPS is mainly composed of an inverter, a battery, a rectifier/charger, and a changeover switch. The inverter is mainly composed of a crystal triode, a transformer, and a control circuit. Its function is to change the direct current to the AC output. It is the core part of the UPS. The technical performance and quality of the UPS mainly depend on it. The battery is a UPS energy storage device. The battery in the UPS should have good high-current discharge characteristics, can withstand repeated charge and discharge, and has a long life. Currently, the UPS is commonly used as a maintenance-free sealed lead-acid battery. The rectifier/charger is a device that converts utility power into direct current to provide power to the inverter and battery. The function of the transfer switch (static switch) is to pass the instantaneous high-speed detection circuit. When there is interference or large surge in the mains, the UPS is quickly turned to the bypass output to protect the UPS; its second function is to provide Maintenance access. The switching switch requires fast switching time and large overload capability.
Characteristics of various types of UPS
1 feature of online UPS.
a. The online UPS is a sine wave output, the most notable feature of which is the real uninterrupted power supply to the load.
b. The online UPS implements anti-interference power supply to the load. Because the online UPS is powered by the mains or battery to the load, it must be carried out through the inverter, which may fundamentally eliminate all voltage fluctuations from the mains grid and the impact of electrical interference on the load, the UPS always to the load Provide a high-quality AC power supply with stable voltage regulation. Moreover, the online UPS has the smallest sinusoidal distortion factor.
c. Compared with the various UPSs, when the online UPS has excellent transient characteristics, its output voltage changes less than 4% at 100% load loading or load shedding, and the time is about 10 to 40ms.
d. Online UPS has high operational reliability.
2 Backup sine wave output UPS features.
a. Generally, various sinusoidal output UPS circuits adopt anti-interference grading voltage regulation technology. When the commercial power is in the range of 180-250V, it can output a sinusoidal voltage with anti-interference regulation...
b. The switching time is short, about 4ms, and the shortest is 2ms.
c. The neutral and live wires at the output are fixed. This is because the mains supply in the UPS or the inverter supplies the load to the load by the same power transformer. Therefore, users should comply with the manufacturer's regulations when connecting such UPS. After the sine wave output UPS has zero, fire line error circuit, once the input terminal zero, the fire line and the UPS requirements are inconsistent, the UPS will automatically protect, there is no output. It should also be pointed out that the zero line of the 220V input in the various UPSs is the ground line of the UPS control line.
After 3 kinds of square wave output UPS features.
a. Like all kinds of sine wave output UPS, the line adopts anti-interference grading voltage regulation technology. When the mains changes between 180 and 250V, its voltage regulation accuracy is 5%~10%. When the mains is interrupted, the inverter provides a square wave power supply with ±5% stability and no interference to the load.
b. The square-wave output of the backup UPS control line is not synchronized with the commercial power, and the switching time is correspondingly longer than the sine wave output after the various UPS, about 4 to 9ms.
c. Like the UPS of various sine wave outputs, its output terminal is zero and the live wire is fixed. When in use, the polarity of the AC input should be following the factory regulations.
d. Can not connect to the load of the nature of fluorescent lamps, otherwise it will not reach the factory specifications of the machine, or damage the UPS itself. Also, it cannot be frequently shut down and started. After the UPS is turned off, if it is restarted immediately, it will not work normally. At this time, there is no voltage output and the buzzer sounds long, which is called startup failure. Therefore, after shutting down, if you need to reboot, you have to wait for more than 6s.