UPS (uninterruptible power supply) in the power have been able to continue to supply equipment for the computer because it has a stored energy inside the device at work, which is the UPS energy storage battery of the device. Its main function is: When the normal electricity will be converted into chemical energy stored in the internal battery; power failure when the city will convert chemical energy into electrical energy provided to the inverter or the load. UPS battery is directly related to the merits of the entire UPS system reliability, however, it is the UPS battery system MTBF (MTBF) of a device as soon as possible. If the user can be the proper use and maintenance, will be able to extend its useful life, on the contrary it will significantly shorten the life, the types of batteries in general to play lead-acid batteries, maintenance-free lead-acid batteries and nickel-cadmium batteries. VRLA battery capacity is rated 10-hour rate discharge capacity. Battery discharge current is too large, then less than rated capacity. Therefore, equipment should be based on load, voltage, size and other factors to select the appropriate battery capacity. The total capacity of the battery should be YD5040-97 "communications equipment installation design specifications of power" in the provisions of configuration, calculated as follows: Q ≥ KIT Η [1 + α (t-25)] Where: Q --- battery capacity (Ah); K --- safety factor, from 1.25; I --- Load Current (A); T --- discharge the number of hours (h); Η --- discharge capacity coefficient; t --- the location of the actual battery minimum ambient temperature values. Heating equipment is located there, according to 15 ℃ to consider, no heating equipment, by taking 5 ℃; battery temperature coefficient α --- (1 / ℃), when the discharge rate of ≥ 10 hours, let α = 0.006; when the 10> hour discharge rate of ≥ 1, let α = 0.008; hours when the discharge rate of <1, take α = 0.01. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve Three way ball valve V Type Ball Valve
We can offer more Knife Gate Valve Information.If you need us according your spcification to produce the Knife Gate Valve .
Need, please e-mail to valve401@gmail.com
No comments:
Post a Comment