【 Weak current College 】 UPS knowledge 15 q

UPS knowledge 15 asked 1. Why use UPS? what is the role of UPS? A: due to the development of information technology, network has become the life and work as an integral part, constitute a network of digital engine room power supply reliability has become a key, and the engine room of reliable power supply is a priority, UPS just to solve the uninterruptible power supplies UPS equivalent of, the three basic functions: regulators, filtering, non-stop.　　In AC power supply, it is the regulator and filter effects to eliminate or weaken the mains interference that guarantee the equipment normal work; in the mains, it also can put its DC power supply (battery, diesel generator, and so on) provide direct current into the perfect use for workloads, AC power by AC power to battery-powered General 0 time switch, allowing the load device cannot feel any changes while maintaining a run, the real guarantee of uninterrupted operation of the device.　　UPS knowledge 15 asked 2.UPS General with inductive load of ability or capacity with capacitive load strong? why? A: the General UPS is designed by inductive load, so with inductive load is its part. General UPS inverter output shunt capacitor on the one hand, on the other hand since filter is offset by the load of inductive components.　　If loads capacitive, and how to counteract with capacitive capacitive component? can only increase the output of the component, and these capacitive component of current must provide by the inverter so that the inverter output of active component is reduced, so the load capacity is reduced.　　UPS knowledge 15 asked 3.STS (static switch), LBS (synchronization) and the role of dual-bus? A: STS's role is two-channel input AC power switch LBS's role is to synchronize the two groups of UPS, in order to make the switch time of STS to zero.　　Dual bus's role is to give the electrical devices provide redundant power supply.　　UPS knowledge 15 asked online UPS 4.EPS and what are the key differences between the primary purpose of the two buildings? A: the similarities with UPS: EPS is 100% off line UPS, it works and off line UPS. Differences: EPS load due to the band, such as lighting and start pumps, power needs to be done, when you start the pump can be made of the inverter and UPS backup frequency converter; as the main object is the PC such as IT equipment, so the capacity of the very few over 3KVA.　　General 3KVA above IT device selection online UPS, where in IT equipment is not used in EPS.　　UPS knowledge 15 asked 5. frequency and high frequency machine what advantages and disadvantages compared to the high-frequency machine can replace? power frequency machine?　　A: UPS power frequency machine: disadvantage is the low-power input power factor, low efficiency, small and big, bulky, high reliability low price; the benefit is relatively easy to manufacture, particularly manual job impact is not big, the relatively low number of required consistency.　　UPS: the advantages of high frequency machine is a high input power factor, low power consumption, high efficiency, small size, lightweight, high reliability; but on the means of production, requirements for conformance.　　UPS knowledge 15 asked 6. Why use VA UPS capacity that this what power? A: active power unit is the Watt (W), reactive power is spent (var).　　General UPS capacity are apparent power, apparent power consists of both active and reactive power, neither called W cannot call var, as is apparent power is volts (V) and ampere (A), simply known as VA.　　UPS knowledge 15: 7. What is the active power, reactive power what? A: active power refers to the load of the power of doing work, such as the bulb, the circuit and so on. Work and fully into heat dissipation into the atmosphere, are gone.　　Reactive power is stored in the energy storage device (device) power, it can be converted to active power.　　UPS knowledge 15 asked 8.UPS efficiency is defined as what it represents? and power factor is one thing? A: UPS efficiency η is defined as output active power P and enter active power P ' is the ratio of the percentages of, namely: η = (P/P ')%. It is a measure of the size of signs UPS power.　　And power factor is not the same thing.　　UPS knowledge 15 q 9. battery capacity units? what is its meaning? A: the battery capacity is short for Ann, ampere hour (AH), it means that the battery in a specified discharge rate of constant current or constant power discharge, to the specified discharge time end moment release capacity.　　If the discharge rate of 10, capacity of up to 100AH battery discharge current 10A, constant-current discharge 10H, the release of capacity is 100AH.　　UPS knowledge 15 asked 10. understanding the developments on the UPS user what benefits? Answer: understanding the development orientation of UPS's main purpose is to enable users to avoid buying just eliminated outdated or will soon be obsolete equipment, so as not to cause unnecessary losses.　　Currently, UPS has grown into an on-line type parallel redundant UPS system modular solutions, channels, and users are aware of the modular has come, it will replace the traditional UPS in the application of the data room.　　UPS knowledge 15 asked 11.UPS trend is what? A: the development of the UPS Technology's main purpose is to improve the UPS output load dynamic response more quickly.　　Obviously, the modular UPS adopts the foreign advanced high-frequency technology, the realization of dynamic response for the fastest, the best results.　　UPS knowledge 15 asked 12. traditional power frequency machine with output isolating transformer can increase the load capacity and reduce zero voltage?　　A: the output of the power frequency machine isolation transformer strictly speaking it is an integral part of the inverter, there is no full isolation effect, because the bypass line without isolation, zero without quarantine.　　UPS knowledge there are fifteen asked 13.UPS against lightning? Answer: the UPS can enter C-level lightning protection option, it is available in two ways: 1) to protect the load as a priority of mine;2) to protect the power supply is a priority of mine, however. Because UPS installed lightning at the provincial level in the power distribution Cabinet, but the distribution among them, the Thunder or lightning protection installations cannot be omitted.　　Lightning in the UPS selection is very important factors.　　UPS knowledge 15 asked 14.UPS brought isolating transformer can resist overload capacity enhancement? Answer: wrong, that's the reaction is slow, UPS will go later overload by-pass normal work, such as load and recovery rectifier and the inverter.　　We should upgrade UPS capacity to meet the growing needs of load capacity.　　UPS knowledge 15 asked 15. power frequency machine quality is more stable? A: some high-frequency machine because the cost of production time savings, production conditions and the design behind the quality does not cross the border. Current high-end UPS brands such as: deguowei figure, PK, United States Aikesai, Emerson, Switzerland can viagra be a highly integrated modular UPS series high frequency. It's more environmentally friendly, energy-saving, green development trend of the ups.