EPS power supply is also known as EPS, EPS emergency power supply and fire emergency power supply, and its full name is emergency power supply (emergency power supply). EPS is to provide an emergency power supply system with independent circuit in accordance with fire protection specifications based on the principle of dealing with first-class load power supply equipment such as emergency lighting, accident lighting and fire-fighting facilities. The system can supply emergency power in an emergency state to deal with lighting power, or only one circuit of mains power is short of the second circuit power supply, or replace the generator set to form the second power supply, Or as an occasion requiring a third power supply.
UPS power supply and uninterruptible power supply, full name: uninterruptedpower supply, refers to the power supply equipment that converts the DC output from the battery into continuous communication power supply when the normal communication power supply is suspended.
EPS power supply is different professional products derived from UPS power supply, and the application time is relatively late.
Both EPS power supply and UPS power supply have mains bypass and inverter circuit. The functional difference is that EPS only has the function of continuous power supply. Generally, it does not have high requirements for inverter switching time. It can have multi-channel output, and has the function of monitoring and detecting each output and single battery. It focuses on bypass power supply in daily life. It is only converted to inverter power supply in case of mains power failure, and the power utilization rate is high. UPS (on-line) has only one total output, which generally focuses on its three functions: (a) voltage stabilization and frequency stabilization (b) uninterrupted power supply with high requirements for switching time (c) purification of municipal power, daily power supply with double conversion circuit focusing on rectification / inverter, and bypass power supply only in case of inverter failure or overload, with low power utilization rate (generally 80% - 90%). However, in European and American power grids and countries with relatively perfect power supply, in order to save energy, some ups application sites have been replaced by EPS with extremely short inverter switching time (less than 10 milliseconds).
In China, EPS power supply is mainly used for electrical equipment in fire fighting industry or other electrical equipment with low power supply quality requirements, and only focuses on the function of continuous power supply, while UPS power supply is generally used for precision instrument loads (such as it loads such as computers and servers) requiring high power supply quality; Great emphasis is placed on inverter switching time, output voltage, frequency stability, purity of output wave type, no interference, etc.
In foreign countries, Europe, America and other developed countries, their power grids are connected to the grid, with sufficient and perfect power and good power supply quality. In order to save energy, many field mergers do not advocate the use of double conversion online UPS, but recommend the use of UPS (i.e. CPS) under energy-saving work. CPS is the prototype of EPS design in the early stage, and the basic principles are consistent.
UPS maintains critical loads such as computers and servers. If the system breaks down, it will cause economic losses, while EPS belongs to fire-fighting products. The focus of maintenance is human life safety, and fire or other accidental disasters will cause the loss of human life. China has always attached importance to the immediate economy to avoid losses, but did not pay attention to the bad traditional habit that may lead to the loss of human life. However, in recent years, the loss of human life and property caused by large fires has been shocking, and people's awareness of fire safety has been gradually improved. Now, several provinces have enforced the configuration of EPS emergency power supply in the fire fighting profession or the construction and electrical installation profession.
