eps power supply is the main goal to solve the first-level load power supply equipment such as emergency lighting, accident lighting, firefighting facilities, etc., to provide an emergency power supply system with independent loops that meets the fire protection regulations, can provide emergency power supply in an emergency state Lighting power or only one line of mains power lacks the second line of power. Ups are uninterruptible power supplies. Although both are used in power supply equipment in computers, metallurgy, fire protection and other industries, their working principles, characteristics, and performance are still somewhat different. So how does the eps power supply work? What is the difference between eps power supply and UPS ? Let's take a look at the specific content with me. So today we will introduce the difference between eps power supply and UPS .
The working principle of eps power supply
eps power supply is also called fire emergency power supply, full name Emergency Power Supply (emergency power supply), the new national standard is GB17945-2010 "fire emergency lighting and evacuation indication system". It is an emergency power source used for power guarantee and fire safety in today's important buildings.
The principle of eps power supply is that when the mains power is normal, the mains power is supplied to the important load through the output switching device, and 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 At the same time, the output switching device will immediately switch the mains power supply state to the inverter power supply to provide emergency power supply for the load equipment; when the mains power is restored, the emergency power supply will be restored to the mains power supply.
eps power supply price
EPS power supply prices are generally between 200 ~ 300 yuan.
Note: This price is for reference only! Due to different regions, of course, the price will vary. If you want to know more about the relevant price details, please refer to the local dealers!
eps power supply manufacturer
Shenzhen Yi Kesai Power Co., Ltd.
Beijing Tianheng Real Estate Technology Development Co., Ltd.
Tianjin Chengshengyuan Technology Co., Ltd.
Chuneng West Electric Co., Ltd.
Zhongshan Tianyou Electronic Technology Co., Ltd.
Qingdao Steep Electric Engineering Co., Ltd.
Foshan Baker New Energy Technology Co., Ltd.
Seven common steps of eps power supply maintenance
1. Check the EPS power supply, not only to check the voltage with a multimeter, but also to check the voltage waveform with an oscilloscope
2. Check whether the crystal oscillator has started, you can use the oscilloscope to check the waveform of the crystal oscillator foot to view
3. Check whether the reset signal is normal and whether the reset pulse is correctly sent to the reset pin of the CPU chip.
4. Any open or short circuit of data bus, address bus and control bus in eps emergency power supply can cause a fault. It can be judged by testing the resistance of the parallel bus to ground to compare whether there is a fault on a certain road, or observe the bus of each road. Waveform. The fifth step is to check the interface chip
5. Eps fire-fighting power interface chip is the most damaged type of component, which can be judged whether it is damaged by substitution or special instrument detection.
6. Through line testing, component testing and other work, deal with the faults found, including line repair, component replacement, transformation and other work.
7. Test the power supply
After troubleshooting, before loading the machine, an offline loading test should be performed. Only after passing the test can be used for load testing and use.
EPS emergency power supply often has the following faults
(1) The output circuit breaker trips due to a large overload;
(2) Due to the quality problem of the circuit breaker, the output circuit should be tripped without being disconnected when the output circuit is seriously overloaded or short-circuited, thereby causing an internal failure of the EPS emergency power supply;
(3) EPS emergency power supply charging board failure or EPS battery quality problems;
(4) The output circuit is overloaded to 120% -140% under normal conditions of the city power. The circuit breaker has not tripped, and the EPS inverter cannot switch the power supply when the mains power fails.
(5) The front end of the EPS emergency power supply is not equipped with a lightning protector, and the EPS is damaged by lightning during the thunderstorm season;
(6) The operator frequently operates the forced start function of the EPS emergency power supply, and the battery discharge depth is too large, thereby damaging the battery.
(7) The air is humid in spring and summer (especially in the basement), which causes condensation on the internal control circuit board of the EPS emergency power supply, causing EPS control failures, etc.
The difference between eps power and ups
1. Different categories
EPS emergency power supply in China is mainly used by the fire protection industry as a kind of electrical equipment. What it can reflect is that it can continuously supply power at the disaster site when fire and other disasters occur. But the 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 performance
Although both the eps power supply and the UPS power supply have a mains bypass and inverter circuit, the functional difference between the two is that the eps emergency power supply is a continuous power supply function, which generally does not require much time for inverter switching , But in special occasions, its application will still have some special requirements. When the UPS power supply is online, there will only be one total output.
3. Difference in principle and structure
Because EPS emergency power supply is mostly used for disaster power supply, the inverter emergency power of EPS emergency power supply has a relatively large amount of redundancy. Therefore, the incoming cabinet and the outgoing cabinet are placed inside the eps, and the motor load is started by frequency conversion. The inverter redundancy of the ups power supply is relatively small, and it has nothing to do with fire protection. It does not need to be flame-retardant and does not need the mutual investment function.
Editor's summary: The general eps power supply is mainly composed of input, output unit, a charging module, battery, inverter, monitor, output switching device and other parts. Usually eps power supply and ups power supply energy-saving power supply are widely used in architectural lighting, Road lighting, tunnel lighting, electricity, industrial and mining enterprises, fire elevators, etc. As long as we pay attention, we can often see this kind of power supply in our lives.
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