UPS full name Uninterruptable Power System (or Uninterruptable Power Supply), in the event of an accidental power outage or poor power quality, UPS can provide high-quality and the most economical power supply, to ensure the integrity of the computer data and the normal operation of precision instruments. The UPS can provide high quality and most economical power supply to ensure the integrity of computer data and normal operation of precision instruments.
2. What are the electrical performance indicators of UPS and how are they categorized?
The electrical performance indicators of UPS are basic electrical performance (such as input voltage range, stabilization rate, conversion time, etc.), certified performance (such as safety certification, electromagnetic interference certification), appearance and size. According to the output voltage waveform in the utility power failure conversion time, UPS can be categorized into backup (Off Line, conversion time) and online (On Line, no conversion time) two kinds. Line Interactive (Line Interactive) is regarded as a variant of the backup type because it still has a conversion time, only the charging time is shorter than that of the backup type. Another major difference between backup and online UPS is the voltage stabilization rate, online voltage stabilization rate is generally within 2%, while the backup type is at least 5% or more. Therefore, if the user's load equipment belongs to high-level communication equipment, medical equipment, microwave receiving equipment, to choose online UPS is better.
3, the load (such as computers) on the UPS conventional electrical performance indicators, the range of its use.
Computer and other general office equipment, is a rectifier capacitive load, such load power factor is generally between 0.6 to 0.7, and the corresponding peak factor is only 2.5 to 2.8 times. And other general motor load power factor is only between 0.3 and 0.8. Therefore, the general UPS as long as the design has a power factor of 0.7 or 0.8, and the peak factor of 3 or more to meet the needs of the general load. High-end computers on the UPS another demand for a low zero-ground voltage, with super lightning protection measures, short-circuit protection and electrical isolation and other requirements.
4, reflecting the UPS on the grid adaptability of the indicators are?
UPS on the grid adaptability indicators should include: ① input power factor; ② input voltage range; ③ input harmonic factor; ④ conductive electromagnetic field interference size and other indicators.
5, UPS input power factor is low, what adverse effects?
UPS input power factor is too low for the average user is the user must invest in thicker cable and air circuit breaker switch and other equipment. In addition, a low UPS input power factor is detrimental to the utility company (because the utility company needs to provide more power to match the actual power consumption of the load).
6, reflecting the UPS output capacity and reliability of what indicators?
UPS output capacity that is the UPS output power factor, general UPS for 0.7 (small capacity 1 ~ 10KVA UPS), while the new UPS is 0.8, with a higher output power factor.UPS reliability indicators for the MTBF (Mean Time Between Failure). Above 50,000 hours is good.
7, on-line UPS "on-line" meaning includes what, what are the basic characteristics?
The meaning of the following: ① zero conversion time; ② low output voltage stabilization rate; ③ can filter the input power surge, clutter and other functions.
8, UPS output voltage frequency stability refers to what, the difference between various types of UPS?
UPS output voltage frequency stability refers to the no-load and full-load UPS output voltage and the size of the frequency change. Especially in the input voltage variation range of the maximum value and minimum value change can still have a good output voltage and frequency stability. For this requirement, online UPS is far better than the backup type and online interactive type, and online interactive UPS and backup type is similar.
9, the user in the configuration and selection of UPS, what factors should be considered?
Users should consider ① understand the application of various architectures of UPS; ② consider the requirements for power quality; ③ understand the capacity of the required UPS, and consider the total capacity of the future expansion equipment; ④ choose a reputable brand and supplier; ⑤ focus on service quality.
10, the grid quality is not good, and requires 100% can not be blackout of the power occasions should choose what kind of UPS, which should be valued UPS function indicators to choose UPS?
Power grid conditions in poor areas is best to use a long time delay (8 hours) on-line UPS, power grid conditions in the middle or in good areas can be considered to use the backup type of UPS. input voltage and frequency range Whether a wide range of input voltage frequency, whether there is a strong lightning protection, electromagnetic interference resistance is certified, etc. are the selection of UPS need to focus on considering the functional indicators.
11, with small capacity or local power supply occasions, should be valued which function indicators to choose UPS?
With small capacity or local power supply occasions, first of all, to choose a small capacity UPS, and secondly according to the quality of the power supply requirements of the high and low, select the on-line or backup UPS. backup UPS 500VA, 1000VA, on-line UPS 1KVA to 10KVA can be used. 1KVA to 10KVA for users to choose.
12, large capacity or centralized power supply occasions, what should be valued to select the functional indicators of the UPS?
Large capacity or centralized power supply occasions, you should choose a large-capacity, three-phase UPS, and consider whether there is ① output short-circuit protection; ② can be connected to the love of 100% unbalanced loads; ③ isolation transformer; ④ can be used as a hot standby; ⑤ multi-language graphics LCD display; ⑥ can be used for remote control. The UPS should have ① output short-circuit protection; ② overload capacity; ③ full-time lightning protection.
14, the power supply of intelligent management requirements of high occasions, what kind of UPS should be selected?
Should be selected to network monitoring of intelligent UPS, UPS has a monitoring software support in the local area network, wide area network, the Internet monitoring, enabling users to achieve the purpose of network monitoring of the UPS. The monitoring software should be able to (1) automatic paging and automatic E-mail; (2) automatic voice broadcast; (3) safe shutdown and restart of the UPS; (4) across different operating platforms; (5) can be booked on; (6) can be done to analyze the power supply status records; (7) can monitor the UPS operating status. And the monitoring software should be certified by Microsoft.
15, the user should be on the UPS manufacturer to do what aspects of the investigation?
1) whether the manufacturer has ISO9000 and ISO14000 certification; ② whether the well-known brands, the importance of customer benefits and product quality; ③ whether there is a local maintenance center or service unit; ④ whether the safety specifications and anti-electromagnetic interference through the international certification; ⑤ UPS has a higher value-added, such as whether the future can do network monitoring or smart monitoring The UPS has a high added value, such as whether the future network monitoring or intelligent monitoring, etc.