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Uninterruptible power supply system scheme
Product overview
Uninterruptible power supply equipment (Uninterruptible Power Supply), referred to as UPS, the product is small in size, easy to use, with high efficiency and high reliability, to provide reliable and high-quality AC power for the load. It is composed of a host (rectifier inverter) and a battery, which performs double conversion of the mains rectifier and inverter, and outputs the AC power supply equipment through the battery energy storage. It is mainly used in computers, network systems or other important electronic equipment to provide stable and uninterrupted power. When the mains input is normal, UPS will supply the mains to the load for use after double conversion and voltage stabilization. When the mains supply is interrupted, UPS will immediately invert and convert the battery electric energy and continue to supply to the load to protect the electric load from damage.
Technical Requirements
1. Uninterruptible Power Supply (UPS) for Communication YD/T1095-2008
2. GB7260.1-2008 on Uninterruptible Power Supply Equipment-Part 1-1: General Provisions and Safety Requirements for UPS Used in Operator's Reach Area
3. GB7260.2-2009 of Uninterruptible Power Supply (UPS) Part 2: Electromagnetic Compatibility (EMC) Requirements
4, "uninterruptible power supply (UPS) part 3: methods and test requirements to determine the performance" GB7260.3-2003.
Uninterruptible power supply UPS application scope: enterprises, education, banks, securities, government, hotels, medical and other small computer rooms or offices and other places.
UPS is set up to solve the problem of uninterrupted power supply. UPS has three basic functions: voltage stabilization, filtering and uninterrupted. In the mains power supply, it is the function of voltage stabilizer and filter to eliminate or weaken the interference of mains power and ensure the normal operation of the equipment. When the mains power is interrupted, it can convert the direct current provided by its DC power supply part into perfect alternating current for load use, in which the power supply from the mains power supply to the battery power supply is generally switched at zero time, in this way, the load equipment can not feel any change at the same time to maintain the operation, and truly ensure the uninterrupted operation of the equipment.
Product working principle
UPS is also called uninterruptible power supply. It is a system equipment that connects the battery with the host and converts DC power into mains power through the module circuit such as the host inverter. UPS power supply is divided into three types, namely online type, backup type, online staggered type.
The working principle of on-line UPS is that when the on-line UPS supplies power normally in the power grid, the voltage input by the power grid passes through a noise filter to remove high-frequency interference in the power grid, and pure alternating current can be obtained, which enters the rectifier for rectification and filtering, and converts the alternating current into smooth direct current. After that, it is divided into two channels, one channel enters the charger to charge the storage battery, and the other channel supplies the inverter. When the mains power is interrupted, the input of AC power has been cut off and the rectifier no longer works. At this time, the battery discharges energy to the inverter and then the inverter turns DC power into AC power for load use. Therefore, for the load, although the mains no longer exists, the load is not shut down due to the interruption of the mains and can still operate normally.
The working principle of backup UPS is that when the power supply of the power grid is normal, one road mains charges the battery through the rectifier, while the other road mains charges the load directly by the bypass switch after initially stabilizing the voltage through the automatic voltage stabilizer and absorbing some interference from the power grid. At this time, the battery is in a charging state until the battery is fully charged and transferred to a floating state. UPS is equivalent to a voltage regulator with poor voltage regulation performance, but it improves the fluctuation of the mains voltage, and does not make any adjustment to the "electrical pollution" such as unstable frequency and waveform distortion on the power grid. When the grid voltage or grid frequency exceeds the input range of UPS, that is, under abnormal conditions, the input of alternating current has been cut off, the charger stops working, the storage battery discharges, and the inverter starts to work under the control of the control circuit, so that the inverter generates 220V and 50Hz alternating current. At this time, the UPS power supply system is converted to continue to supply power to the load by the inverter. The inverter of the backup UPS is always in the backup power supply state.
The working principle of online interactive UPS is that when the mains supply is normal, the mains supply is directly supplied to the load. When the mains supply is low or high, it is output through the internal voltage stabilizing line of UPS after voltage stabilization. When the mains supply is abnormal or power failure occurs, it is converted into battery inverter power supply through the conversion switch. Its characteristics are: a wide input voltage range, low noise, small size and other characteristics, but there is also a switching time, but compared with the general backup UPS, this type of protection function is stronger, the inverter output voltage waveform is better, generally sine wave.
Technical parameters
Model |
LUD-1KVA~10KVA |
LUS-10KVA~600KVA |
|
Communication input |
Voltage range |
AC 220V±20% |
AC 380V±20%，400V,415V |
Frequency range |
50Hz±5% |
||
Output |
Voltage accuracy |
AC220V±1% |
AC380V±1%,400V,415V(Optional) |
Frequency accuracy |
50Hz±1％ |
||
Output waveform |
Sinusoidal waveform |
||
Power factor |
0.8 |
||
Waveform distortion |
Linear load<1%, non-linear load<3% |
||
Peak coefficient |
3：1 |
||
Intelligent mode efficiency |
95% |
||
Monitoring device |
LED display |
Input voltage, output voltage, battery voltage, and fault display and warning functions |
|
Interface |
RS232 interface |
||
Environment |
Working temperature |
0℃-40℃ |
|
Working humidity |
20%-95% |
||
The standard UPS has its own battery inside, which can continue to supply power for several minutes to tens of minutes after a power failure;
Long-term UPS needs to be equipped with an external battery pack, which can meet the needs of long-term continuous power supply, and the configuration time can reach more than several hours.
Model specifications
The company's product specifications and models are complete, which can meet the user's various specifications and power design requirements. The following specifications and dimensions are for reference only. Please consult customer service personnel for customized models and specifications.
Number |
Model |
Rated capacity (KVA) |
Number of battery cabinets configured (15 minutes) |
Remarks |
1 |
LUD-1KVA |
1 |
0 |
1. The standard UPS power supply has a specification of 1kVA-20kVA, built-in battery, and a backup standard time of 15 minutes. |
2 |
LUD-2KVA |
2 |
0 |
|
3 |
LUD-3KVA |
3 |
0 |
|
4 |
LUD-5KVA |
5 |
0 |
|
5 |
LUD-15KVA |
15 |
0 |
|
6 |
LUD-20KVA |
20 |
0 |
|
7 |
LUD-30KVA |
30 |
1 |
|
8 |
LUD-60KVA |
60 |
1 |
|
9 |
LUD-100KVA |
100 |
1 |
|
10 |
LUD-150KVA |
150 |
2 |
|
11 |
LUD-200KVA |
200 |
2 |
|
12 |
LUD-300KVA |
300 |
2 |
|
13 |
LUD-400KVA |
400 |
3 |
|
14 |
LUD-500KVA |
500 |
4 |
|
15 |
LUD-600KVA |
600 |
4 |
Note: According to the emergency time configuration, select the same size of the battery cabinet and quantity, form the power pack screen system.
Technical features
Double conversion circuit structure, with voltage and frequency stabilization, maximum protection of the load;
The use of special power supply integrated power IGBT, high output accuracy, high inverter efficiency;
With perfect protection function and alarm function;
With overvoltage, undervoltage, overcurrent, short circuit and other protection functions;
Input and output are fully isolated, safe and reliable, ensuring stable output power;
Can provide standard RS232 and power dedicated communication protocol, can realize remote monitoring.
Selection scheme
Determine the required UPS capacity
List all the equipment to be protected. The voltage and power data of each equipment can be found on its backplane. Multiplying the two to obtain (VA) volt-ampere value to calculate the sum of all loads: W = W1 W2 ……… Wn, unit: watts (W).
Capacity of UPS: VA ≥(W ÷ 0.8)(UPS power factor and considering impact resistance and expansion requirements of UPS).
The VA value can also be added with 30% of the reserved expansion capacity for system upgrade.
Determine the type of UPS required.
According to the load on the output stability, switching time, output waveform is determined to select the online, online interactive, backup and sine wave, square wave and other types.
On-line UPS has stronger output stability and instantaneous response capability than the other two, and has stronger adaptability to nonlinear load and inductive load, higher safety factor, can resist various infringements from the power grid, such as high voltage, spike, surge, noise interference, etc., and outputs pure power supply to protect the load at all times. On-line UPS is recommended for some more sophisticated equipment, more important equipment and high-end servers.
In some areas where the range of mains fluctuations is relatively large, avoid the use of interactive and backup. If you want to use a generator with a short delay UPS, you recommend use an online UPS, because the stability of the voltage and frequency of ordinary generators is poor, and the use of interactive and backup types may cause abnormal work.
Determine required battery backup time
According to the working time required by the equipment after power failure. Often the cost of batteries used in long-delay models may exceed that of the UPS host itself. Due to the high value of the battery, it is recommended to choose a better quality battery, which is critical to the reliability of the UPS system.
Additional functions.
In order to improve the reliability of the system, it is recommended to use UPS hot backup system, which can be considered in series or parallel. Small capacity UPS(1 ~ 2KVA) can also use redundant switches. Remote monitoring panel can be used to monitor and control UPS at the remote end. The monitoring software can be selected to realize the intelligent management between the computer and UPS. Network adapter can be selected to realize network management of UPS (based on SNMP). In some rainy and thundery areas, can be equipped with lightning protection device.
Product Picture
Commercial UPS
Power-specific UPS
Modular UPS
Service Telephone
Telephone:0551-65317588,65323322
Fax: 0551-65313339
E-mail:hflx88@163.com
Address:No.61, Yulan Avenue, High-tech Zone, Hefei City
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