The hottest Wade EPS emergency power supply is wid

Wade EPS emergency power supply is widely used

Abstract: with the progress and development of society and the continuous improvement of environmental requirements, fire safety has been paid more and more attention. EPS will be recognized by more and more people for its unique advantages. As a reliable emergency power supply, EPS fire emergency power supply can be flexibly used at the end of fire power supply circuit, individual important occasions, etc. The use of EPS emergency power supply provides a more powerful guarantee for fire safety

key words: EPS battery emergency power Untitled Document in recent years, EPS battery is widely used as an emergency power supply, especially as a fire emergency power supply. The author discusses the related issues

1 EPS emergency power supply

1.1 working principle of EPS emergency power supply

eps emergency power supply is an emergency power supply device that allows short-term power interruption. As a fire emergency power supply system, it provides centralized power supply for evacuation lighting and other important primary power supply loads when a building fire occurs. Under normal conditions, the AC mains supply will supply power to important loads through the mutual switching device. When the AC mains supply is cut off, the mutual switching device will immediately switch to the inverter for power supply. The power supply time is determined by the capacity of the battery. When the mains supply voltage is restored, the emergency power supply will be restored to the mains supply

1.2 system composition of EPS emergency power supply

eps emergency power supply mainly adopts SPWM (AC pulse band modulation) technology, and the system mainly includes rectifier charger, battery pack, inverter, mutual switching device and other parts. Among them, inverter is the core, and the function of rectifier is to change AC into DC to supply power to battery and inverter module. The function of the inverter is to convert DC power into AC power to supply stable and continuous power to the load equipment. The mutual switching device ensures the smooth switching of the load between the mains power and the inverter output. The system controller monitors the whole system in real time and can send alarm signals. At the same time, it can connect with the computer or modem through the serial port to realize the microcomputer monitoring and remote monitoring of the power supply system

2 application of EPS emergency power supply

at present, EPS fire emergency power supply specially designed and developed for fire emergency measures is progressiveness and practical. It can realize microcomputer monitoring and processing, and realize automatic control of fire-fighting facilities such as fire emergency lighting, rolling shutter door, fire elevator, water pump, smoke exhaust fan, etc. Such products are mostly used in high-rise buildings, airports, telecommunications network rooms, hospitals, important venues and other projects. It has the following characteristics:

(1) it is static when there is electricity, no noise, less than 60 dB, and does not need smoke exhaust and shock proof treatment

(2) automatic switching can realize unattended, and the switching time between electricity and EPS power supply is 0.1s ~ 0.25s

(3) with strong load carrying capacity, EPS is suitable for equipment with inductive, capacitive and comprehensive loads, such as fire elevators, water pumps, fans, emergency lighting, etc

(4) it is reliable to use. In important occasions, double machine hot standby mode can be adopted to ensure reliable power supply in case of accident and fire. The service life of the host can reach more than 20a and the battery can reach more than 5A ~ 10A

(5) adapt to the harsh environment, can be placed in the basement or distribution room, and can be set locally close to the place where the emergency load is used, so as to reduce the power supply line

(6) for some power consumption facilities with large power, in the "4+2" modern industrial system mainly developed in Jiangbei new area, such as fire pumps and fans, EPS can be directly connected with the motor, and then enter the normal operation state after variable-frequency starting

(7) emergency standby time, standard type is 60min (with delay interface)

3 comparison between EPS fire emergency power supply and UPS power supply

using uninterruptible power supply (UPS) power supply mode, its cost is expensive, especially UPS, its conversion efficiency is low, long-term continuous operation, will inevitably cause a waste of electric energy, in fact, UPS is suitable for information loads. See Table 1 for the comparison between EPS fire emergency power supply and UPS power supply

Table 1 comparison index between EPS fire emergency power supply and UPS power supply EPS fire emergency power supply, especially designed for steel experiment in metallurgical industry UPS uninterruptible power supply operation mode

adopts offline operation mode, high efficiency and energy saving, low noise operation mode, efficiency of 70%, high noise and energy saving. It is in sleep state when electricity is normal, power consumption is less than 0.1%, when there is no power supply, its efficiency is more than 92%, and it also works when electricity is normal, Its efficiency is only 85%-90%, about% of the electric energy is consumed, and the inverter works only when there is no electricity. The service life of the host is relatively long, usually years UPS works continuously as long as it is started up, so its service life is relatively short. Generally, it is suitable for annual load adaptability

especially for inductive loads such as motors and various mixed electrical loads. UPS is only suitable for capacitive investment. From now on, it will be simple in composition with resistive load (computer load) system, with low and complex failure rate, High failure rate

4 comparison between EPS fire emergency power supply and decentralized emergency power supply

decentralized emergency power supply is the most widely used in current fire protection, but it can only be limited to emergency lighting. With the popularization of intelligent buildings and the improvement of fire safety facilities, in addition to lighting, it is necessary to supply power to various emergency equipment such as water supply, ventilation and monitoring. The decentralized emergency power supply can not meet the needs, while EPS emergency power supply is fully competent for its work

5 conclusion

with the progress and development of society and the continuous improvement of environmental requirements, people pay more and more attention to fire safety. EPS will be recognized by more and more people for its unique advantages. As a reliable emergency power supply, EPS fire emergency power supply can be flexibly used at the end of fire power supply circuit, individual important occasions, etc. The use of EPS emergency power supply provides a powerful guarantee for fire safety. This kind of packaging structure is also convenient for food to be heated in the microwave oven