Question: What are the differences between EPS fire emergency power supply and UPS power supply?
Answer:

EPS power supply is an abbreviation for emergency power supply. It is usually used in emergency and accident lighting.

UPS power supply is the abbreviation of uninterruptible power supply. Its main function is to provide a stable and uninterrupted power supply for computers or some electronic devices through the way that the batteries are connected to the host. However, many people are apt to confuse the UPS power supply and the EPS fire emergency power supply; but in fact, there is a certain difference between the two power supplies. The following Taixi Electric will analyze it from three aspects.
1. The difference in the output
The power supply object of the UPS is the computer and the network equipment, and the nature of the load is not much different. Therefore, the national standard specifies that the UPS output power factor is 0.8. The EPS is mainly used as a power emergency protection, and the load is inductive, capacitive, and rectifying loads. Some of the loads were put into operation after the mains power failure. Therefore, EPS is required to provide a large inrush current. Generally, it is required that normal operation of 10 in or more can still be performed under a rated load of 120%. Therefore, the EPS needs to have better output dynamic characteristics and is more resistant to overload. The UPS rated capacity is based on the apparent power kv·A, and the EPS rated capacity is expressed in terms of active power kW. The online UPS selects inverter priority to ensure uninterrupted output power supply and high quality power supply. The EPS fire emergency power supply to ensure emergency use, is the choice of municipal power priority.
2. Functional differences
Both have a mains bypass and an inverter circuit, but the EPS only has a continuous power supply function. Generally speaking, the inverter does not require high switching time and can have multiple outputs. The Taixi Electric EPS also configures battery cell monitoring functions. The EPS is powered by the bypass when the mains supply is normal. When the utility power is interrupted, it turns to inverter power supply, and the power utilization rate is high. UPS generally emphasizes its three major functions: constant voltage stabilization, uninterrupted power supply with high switching time requirements, and purification of utility power in daily routines. Rectification; Inverting double conversion circuit power supply, when the inverter is faulty or overloaded, it is switched to bypass power supply, and the power utilization rate is not high. UPS does not play a role only when the utility power is interrupted. When the utility power supply is under voltage, is too high, and the line experiences surges and other abnormal conditions, the UPS can output high-quality power to ensure normal operation of the power equipment.
3. Differences in application areas
In China, EPS is mainly used for the load of fire protection and some of the requirements for power supply quality are not too high, but it is necessary to ensure the continuous supply of electricity equipment. Only emphasize the function of continuous power supply. When EPS is used for firefighting load, its product technology is certified by the Ministry of Public Security. UPS is generally used in computers and digital information systems. It requires a load with a higher power supply quality, and mainly emphasizes the inverter switching time, output voltage, frequency stability, pureness of the output waveform, and no interference.
Daily maintenance of EPS fire emergency power supply

First, place the maintenance of the Taixi Electric EPS fire emergency power supply site

1. Inspect the room for ventilation and room temperature.
2. The environment temperature of the battery equipped with the EPS is not higher than 30°C. The temperature has a great influence on the service life of the battery. The service life of the battery is increased by 10°C above 25°C and the service life of the battery is halved. Conditional units should be equipped with air conditioning.
3. EPS must be kept away from sources of ignition and flammable and explosive materials. General ordinary debris should not be stored in the room where the EPS is placed. It is not conducive to fire safety but also can lead to rodent trapping and the occurrence of bite-inducing cable accidents.
4. Wet air in the spring and summer seasons easily causes condensation on the EPS internal control circuit board, which causes the EPS to have a control failure. Therefore, the indoor and outdoor areas should be protected from moisture in spring and summer.
5. The indoor dust can not be too dirty, the dust generally has a positive charge. If there is too much backlog on the EPS emergency power control board, it may cause the control board to malfunction.
6. The placement of EPS can not be too close to the window to waterproof, rain, and sun.

Second, the mains input maintenance
1. Regularly check if the mains voltage is normal and whether the zero or fire wire is misaligned, especially if the front end of the EPS is a dual-channel mains or a grid with a standby generator, check the main power of the first and the second standby power frequently. Whether the zero or fire wire of the power supply is the same or not must be corrected immediately if it is found to be misaligned, otherwise EPS failure may occur.
1. Users with surge protectors on the front end of the EPS should regularly check whether the surge protector and the grounding cable are normal. Lots of rodents should generally be equipped with protective sleeves on the input and output cables.

Third, the EPS output circuit line maintenance
Determine whether the output circuit is short-circuited according to the status of EPS output circuit breakers. Use the clamp flow meter to check whether each circuit is overloaded. Use the cable to touch the cable to sense whether the temperature of the cable is abnormal and determine whether the wire diameter is appropriate or too small.

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