UPS UPS System Knowledge Q & A

Refer to the block diagram of off-line uninterruptible power system. When the mains power supply is normal, it is directly supplied to the load. At the same time, there is a circuit charging the battery pack through the charging circuit. At this time, if the voltage of the power supply is unstable or abnormal, the ups will switch to the converter, and the converter will provide stable power to the load. The output waveform of most of these products is square wave or step wave, which is also applicable to the power supply of computer

1、 What is off-line uninterruptible power system?

A: please refer to the block diagram of off-line uninterruptible power system. When the city power supply is normal, it is directly supplied to the load. At the same time, there is a circuit charging the battery pack through the charging circuit. At this time, if the voltage of the power supply is unstable or abnormal, the ups will switch to the converter, and the converter will provide stable power to the load. The output waveform of most of these products is square wave or step wave, which is also applicable to the power supply of computer.

2、 What is online interactive uninterruptible power system?

A: refer to the block diagram of the on-line interactive uninterruptible power system. Its principle is not far from that of the off-line ups. The main difference lies in that this kind of product integrates the charging circuit and the converter into a bidirectional conversion circuit, which can automatically detect whether the input voltage is within the normal range. If there is a deviation, the voltage regulator can be used to boost or reduce the voltage to provide a more stable output voltage The working principle is the same as the off-line one.

3、 What is online uninterruptible power system?

A: please refer to the block diagram of the on-line uninterruptible power system. When the mains power supply is normal, it is divided into two circuits which act at the same time after passing through the filter circuit and the surge absorption circuit. One is to charge the battery pack through the charging circuit, and the other is to use the rectified circuit as the input of the converter, and then provide purified AC power to the load through the converter conversion If the power supply is abnormal, the input of the converter is supplied by the battery pack, and the converter continuously provides power to achieve complete non-stop power supply. It can be seen that the output of on-line uninterruptible power system is completely supplied by converter, and its output is stable and pure orthodox wave power supply regardless of the power quality of city power.

4、 How to consider the standby time of UPS?

UPS can be divided into standard type and long-term type according to standby time. The standby time of standard UPS is 5-15 minutes, and that of long-term UPS is 1-8 hours. If your equipment is power-off, you only need to save and exit, then select standard UPS; if your equipment still needs to run for a long time when power is off, you should choose long-term ups.

5、 What are "standard" and "long term" ups?

Standard UPS refers to that a single UPS has a built-in small capacity battery (installed in the main cabinet), and the power supply time is short (only a few minutes under full load). However, the long-term UPS is equipped with large capacity battery, which needs to be installed outside the ups main cabinet with battery box. The power supply time varies from 0.5 hours to 8 hours, which is configured according to the needs of users. In other words, the standard UPS is the ups with the discharge time set by the manufacturer, while the long-term UPS is the ups with the discharge time selected by the customer.

6、 How long is the backup function delayed?

(1) The backup machine uses a genuine Panasonic 12v7ah battery. When the backup machine is equipped with an ordinary PC, the backup time is about 7 minutes, which is enough for the user to exit and shut down according to the normal program, and the protection data will not be lost;

(2) The duration of UPS continuous power supply depends on the load. For details, please refer to the "discharge curve" in the product manual.

7、 What types of loads are not suitable for UPS?

It is not recommended to connect with pure inductive and pure capacitive load. For example, electric motor, air conditioner, copier, etc. And it can't be connected to half wave rectifier load