eps power supply aims at solving the first-class load power supply equipment such as emergency lighting, emergency lighting, fire-fighting facilities, and provides an emergency power supply system with an independent loop, which can provide emergency power supply in an emergency state to solve the problem of lighting power consumption or the lack of a second power supply for only one mains supply. Ups is an uninterruptible power supply. Although both of them are used in power supply equipment in some industries such as computer, metallurgy and fire fighting, their working principles, characteristics and performance are still different. So what is the working principle of eps power supply? What are the differences between eps power supply and ups? Let's take a look at the specific content with me. So today we will specifically introduce the difference between eps power supply and ups.
working principle of EPS power supply
eps power supply is also called fire Emergency Power Supply, and the new national standard is GB17945-21 Fire Emergency Lighting and Evacuation Indicating System. It is an emergency power supply for power supply and fire safety in important buildings today.
the principle of EPS power supply is that when the commercial power is normal, the commercial power supplies power to important loads through the output switching device, and at the same time, the charger charges or floats the battery; When the mains power is cut off or the voltage exceeds the power supply range, the controller starts the inverter, and at the same time, the output switching device immediately switches the mains power supply state to the inverter power supply to provide emergency power supply for the load equipment; When the commercial power is restored, the emergency power supply will restore the power supply for the commercial power.
eps power supply price
The price of EPS power supply is generally between 2 and 3 yuan.
note: this price is for reference only! Due to different regions, of course, the price will be different. For more detailed information about the relevant price, please refer to the information provided by the local dealer!
eps power supply manufacturer
Shenzhen Yikesai Power Supply Co., Ltd.
Beijing Tianheng Real Estate Technology Development Co., Ltd.
Tianjin Chengshengyuan Technology Co., Ltd.
Chuneng Xidian Co., Ltd.
Zhongshan Tianyou Electronic Technology Co., Ltd.
Qingdao stipe Electrical Engineering Co., Ltd.
Foshan Baike Xinneng Technology Co., Ltd. < P > seven common steps for EPS power supply maintenance
1. Check EPS power supply, not only by using multimeter to check the voltage, but also by using oscilloscope to check the voltage waveform
2. Check whether the crystal oscillator has started to vibrate, and you can check the waveform of the crystal oscillator pin with oscilloscope to see
3. Check whether the reset signal is normal and whether the reset pulse is sent to the reset pin of the CPU chip correctly.
4. Any open circuit or short circuit of data bus, address bus and control bus in eps emergency power supply can cause a fault, which can be judged by testing the grounding resistance of parallel buses and comparing whether there is a fault or not, or by observing the waveforms of each bus. Step 5 Check the interface chip
5. The interface chip of eps fire power supply is the most damaged component, and it can be judged whether it is damaged by substitution or special instrument detection.
6, through the line testing, component testing and other work, to find out the fault, including line repair, component replacement, transformation and other work.
7. Test power supply
After troubleshooting, offline loading test should be conducted before getting on the computer. Only after passing the test can the computer load be tested and used.
EPS emergency power supply often has the following faults
(1) The output circuit breaker is tripped due to great overload;
(2) due to the quality problem of the circuit breaker, the circuit breaker should be tripped and not disconnected when the output circuit is seriously overloaded or short-circuited, thus causing the internal failure of the EPS emergency power supply;
(3) the charging board of EPS emergency power supply fails or the EPS battery has quality problems;
(4) the output loop is overloaded to 12%-14% under normal commercial power. The circuit breaker did not trip, and the EPS inverter could not switch power supply when the mains power failed.
(5) the front end of EPS emergency power supply is not equipped with lightning protection device, and EPS is damaged by lightning in thunderstorm season;
(6) Operators frequently operate the forced start function of EPS emergency power supply, and the battery is discharged too deeply, thus damaging the battery.
(7) The air is humid in spring and summer (especially in the basement), which causes dew condensation on the internal control circuit board of EPS emergency power supply, resulting in control failure of EPS.
the difference between EPS power supply and ups
1. Different categories of use
eps emergency power supply is mainly regarded as a kind of electrical equipment by the fire protection industry in China, which can reflect the feature that this product can continuously supply power at the disaster site when a fire and other disasters occur. But ups power supply is different. IT is generally used for precision instrument loads (such as computers, servers and other IT industry equipment).
2. Different product functions and performances
Although both eps power supply and ups power supply have mains bypass and inverter circuits, the functional difference between them is that eps emergency power supply is a continuous power supply function, which generally does not require much inverter switching time, but in special occasions, its application will still have some special requirements. Ups power supply, if online, will only have one total output.
3. Different principles and structures
Because eps emergency power supply is mostly used for disaster power supply, the inverter redundancy of eps emergency power supply is relatively large, so the incoming cabinet and outgoing cabinet are placed inside eps, and the motor load is started by frequency conversion. However, the inverter redundancy of ups power supply is relatively small, which has nothing to do with fire protection, so it is not necessary to be flame-retardant and has no mutual switching function.
Editor's summary: Generally, eps power supply is mainly composed of input and output units, a charging module, batteries, inverters, monitors, output switching devices and other parts. Generally, eps power supply and ups power supply are energy-saving power supplies, which are widely used in building lighting, road lighting, tunnel lighting, electric power, industrial and mining enterprises, fire elevators and so on. As long as we pay attention, we can often see this kind of power supply in our lives.