How to Select UPS Backup Power?

UPS selection and maintenance of UPS backup power

The computer has been widely used in all walks of life. As directly related to the safe operation of computer hardware and software is one of the important factors -- power quality reliability should be considered to the first problem of medium and small enterprises. Along with the computer the birth of ups backup power has now been accepted by the majority of computer users.UPS is mainly used to a single computer, computer network systems or other power electronic device with uninterrupted power supply. At present, UPS is widely used in computer, communications, banking, securities, telecommunications, medical, industrial control and other industries. Many electrical engineering personnel in the configuration of power, tend to focus on uninterruptible power supply (UPS) host performance, ignored the UPS selection of batteries for. Inappropriate matching battery selection tends to cause UPS backup time is insufficient, and the battery cannot discharge accidents, serious impact on the quality of UPS.

The working principle of UPS and types

UPS power is generally made of common power and standby power through the switch combination, between them by a logic circuit to control, to ensure the normal in the power grid blackouts or state, the system can work reliably. When the commercial power is normal, UPS is equivalent to nickel cadmium cell regulated power supply, it will power supply voltage after the computer, at the same time, it also to the UPS battery charging. When electricity is suddenly cut off, UPS immediately to inverter working state, small volume of UPS in general and can continuously supply power 5 ～ 20 min, so can guarantee that the computer system normal exit, make the software and hardware are not subject to loss.


The species of UPS

The UPS classification methods varied, according to the power size can be divided into large and medium-sized mistress power capacity; the output waveform can be divided into square wave, trapezoidal wave or sine wave; according to the input and output can be divided into single phase into single-phase, three-phase to single-phase or three-phase to three-phase; according to the work principle can also be divided into dynamic UPS and static UPS two categories. Dynamic uninterruptible power supply is dependent on inertial flywheel stored energy to maintain the load power supply continuity, the uninterruptible power supply with heavy, large noise, low efficiency, long switching time and other shortcomings, has been replaced by a static uninterruptable power supply. Static UPS to batteries as the energy storage tool, city normal AC power is rectified into a DC electrical and electrical energy stored in the batteries, when the utility power is cut off by the inverter will be stored in the storage battery DC power into AC power to maintain power to the load. According to the different working modes, static UPS can be divided into the backup UPS, on-line UPS, on line interactive UPS and Delta transformation UPS four kind of types.

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Battery Maintenance

The Motive Power Battery Life

The battery life is refers to the use of a period of time, charge and discharge capacity decreased to 80% of nominal capacity prior to the charge and discharge, not discharge or complete failure is the life of the motive power battery; self discharge rate refers to the battery full charge is placed for a long time without the case of slow self discharge phenomenon. Low self-discharge rate show that long time after placing capacity decreases little. Cell function in normal play with our television, audio-visual workers in the daily work of the proper use and careful maintenance of closely related, so the use and maintenance problems should cause our attention.

The Daily Work of Power

In their daily work, should be familiar with their use of cell type, it has the basic characteristics and performance. It can guide us to correctly use and maintenance, have very important sense, to extend the service life of the battery is very important. When charging, the best control in 10 ℃ temperature 30 ℃, right above 30 degrees C best to take measures to cool down the battery, to avoid overheating deformation; And the room temperature below 5 degrees Celsius, will cause the charge is insufficient, affect the service life of the battery.


The Maintenance of Nickel Cadmium Cell

Battery after a period of use, due to different degrees of aging discharge and more or less existence under charge and decreased performance, general nickel-cadmium batteries in about 10 times the charge / discharge cycle, a charge. Method to extend the charging time than the normal charging time is twice. Specific examples are as follows: SONY BC--1WA (B) NP-1 charger for battery charging, in Green Lantern flashing for fast charging, green light stops flashing when the end of long light fast charge trickle charging, charging time extension of drip, drip charging time for charging time, over charging time to 3-4 hours is appropriate. Battery charge / discharge shall be in strict accordance with the requirements of standardized operation, not long after filling, or often inadequate charging. Discharge is not through, the battery when used in the long-term small current depth of discharge or short circuit is caused to shorten the life of battery capacity decline, the important factors. If nickel cadmium cell go on like this will not only affect the use of illegal operation, and will certainly affect the capacity and cycle life of battery. In use when the battery alarm indication lamp flashing alarm, should be timely replacement of batteries, to avoid excess discharge of battery. Nickel cadmium batteries without charging the need to save, but shall discharge the battery voltage to terminate before the package is stored in the original packaging cartons or cloth, paper packaging, placed in dry, ventilated place store.

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