5 Q 5 A explains how to maintain UPS battery (part 2)

4 UPS alkaline batteries are optional?

A: This question is in two situations: first, the user Xu Yong Shan software surveillance. The case, use alkaline batteries, the monitor software displays the parameters of the battery and the real situation will be different. This gives users will Kunrao. Second, users do not have mountains of special software. As the alkaline characteristics of acid cycle battery with very different characteristics. Discharge the battery to the alarm point (one second is called UPS) to the UPS system downtime is very short, users must use the process should pay particular attention; more alkaline generally need add liquid (usually every two years), the user convenient. Dell inspiron 1425 battery Dell inspiron 1427 battery

5, hot backup, how to maintain the battery?

A: 1. Hot backup, the host and the backup machine can use the capacity of different batteries, but the bandwidth required to do so.

a capacity of 2. Off the battery and equipment and machinery is necessary, if the host fails, prepare the machine for a long time continue to provide. In practice, the host usually due to changes in the electricity transferred to the backup battery of machines much higher than the probability that the backup machine can automatically switch to low batteries. Therefore, the battery backup to maintain the machine to double the backup machine in terms of staff. Specific methods include: maintenance of the backup battery: acer Aspire 5720 battery acer Aspire 5720G battery

(1) User utility, press the power button console 1S, inverter to bypass the host, and then bypass the lights are UPS.

(2) Preparation of the machine by booting key 1S, prepared the machine self-test before the battery low voltage mode. LINE BYPASS, BATTERY, INVTERLED the show ring.

(3) To lift the battery backup to maintain the status of two ways:

A: Manuel was once again press the power button 1S, the emergency machine are transferred to LineINV-Mode.

B: automatic, when the discharge voltage back-up protection switching, the opportunity to pause LineINV-mode, when the market anomaly or interruption, the opportunity to pause BATINV- mode. acer Aspire 5920G battery acer BATCL50L battery

5 Q 5 A explains how to maintain UPS battery (part 1)

1, the battery how to maintain normal life expectancy?

A: 1, normal, the battery every 3-6 months, the charge and discharge time, discharge time after charging standard unit of not less than 10 hours. Dell Inspiron 1318 battery Dell Inspiron 1320 battery

2 UPS long rest should be 3 to 6 months duration of load.

3, the battery life, ambient temperature between 0 ℃ to 40 ℃ requirements, avoid direct sunlight and clean.

4, the temperature generally less than normal use Panasonic sealed maintenance-free battery lead-acid float lifetime of 3-5 years.

2, UPS is able to use the battery with water?

A: Yes, but recommends the use of maintenance-free battery. As can occur in the use of water user password, batteries and battery acid gas Tangchu bad, and so on, causing cell necrosis or disrupt the normal functioning of the burden of UPS. In addition, the mountain is a special charger for the UPS lead-acid batteries designed features, it is not applicable to other types of batteries. Dell Inspiron 1320n battery Dell Inspiron 1410 battery

3, UPS will have the release form specific time?

A: Because the discharge time of battery discharge current, ambient temperature, the type of load, speed, battery capacity and numerous other factors related to the actual discharge time can not be directly deduced . Is to provide battery discharge maximum current equation: I = (Pcosφ) / (ηEi)

Where P is the rated output of UPS

Is the power factor of load, PC, server usually take 0.6 to 0.7;

UPS is the performance, usually 0.8 (Mountain Special 10KVA 0.85);

Ei is the end of the discharge voltage of the battery, usually refers to the voltage of the battery.

Specific data on the type, find the current maximum capacity of the battery, you can all temperatures of the battery discharge time and discharge current diagram to identify the corresponding discharge time. Please note that there is obtained the discharge of the battery the total current value. When the external battery when the multiple needs of a single set of battery discharge current value. fujitsu lifebook t4010 battery fujitsu lifebook t4010d battery

Two Test Methods for battery

The detection of zinc-manganese dry is quite common, there are generally two methods. The first method is to measure the instantaneous short-circuit the battery internal resistance to estimate the battery and determine the relevance of the battery; second method involves using a current meter in series resistance of the appropriate strength by measuring the discharge current of the battery to the load resistance of the battery to determine the relevance of the battery. Dell Inspiron 1525 Screen Dell Inspiron 1526 Screen

The first method is the biggest advantage is simple and high current with a multimeter can file directly to determine dry cell battery, a big disadvantage test today, far beyond the limit of battery discharge current allows, to some extent affect the battery use life. The second method has the advantage of the current test, security is good in general does not affect the battery life, the rebate is a bit more complicated.

I use the meter on one of MF47 2 old batteries and battery, 2 were tested using the two methods compared. Suppose that ro is the resistance of the internal battery, RO is the resistance ammeter, with a test on the other hand, RF is the series resistance further, the resistance of 3Ω, power of 2W. Dell Inspiron 1545 Screen Dell Inspiron 17 Screen

The measured results are as follows. New 2 batteries E = 1.58V (measured with a profile of DC voltage 2.5V), 50kΩ resistance voltmeter is much larger than ro, they may be similar to that 1.58V is the battery of electromotive force, or voltage open circuit. Using the first method, the meter serial 5A DC current file indicator, internal resistance RO = 0.06Ω, the measured current is 3.3A. Then ro + RO = 1.58V ÷ ≈ 0.48Ω 3.3A, ro = 0.48 to 0.06 = 0.42Ω. Using the second method, the current measure of 0.395A, RF + RO + RO = 1.58V ÷ 0.395A = 4Ω, the current resistance of 0.6Ω 500mA stall then ro = 0.4Ω = 4-3-0.6. Dell Studio 14 battery Dell Studio 15 battery

Former two batteries when you use the first measured, first measured the open circuit voltage E = 1.2 V, an indicator of resistance RO = 6Ω, a reading of 6.5mA, 50mA DC current meter set of files RO + RO = 1.2 V ÷ ≈ 184.6Ω 0.0065A, ro = 184.6-6 = 178.6Ω. Using the second method, the measured current of 6.3mA, RO + RO + RF = ÷ = 1.2V 0.0063A 190.5Ω, ro = = 190.5-6-3 181.5Ω.

Obviously the results of both methods are consistent. The final results of the small difference is due to reading error, the error resistance RF and the contact resistance caused by other factors, this small error will not affect the judgments on the battery. If the measured battery capacity is small, high voltage (eg 15V, 9V battery laminate), the resistance should be increased to meet the RF. dell latitude d820 battery dell latitude d830 battery

What as basis for UPS power supply evaluation (part 2)

Efficiency

UPS efficiency by measuring the output power and the input power obtained. Mainly determined by the efficiency of the UPS inverter design. Most UPS only 50% load to 100% have better performance, less than 50% when the load is on the sharp decline in the effectiveness of performance indicators manufacturers to provide more than nominal voltage DC, nominal load conditions efficiency. Selection of the best user when the relationship between efficiency and power curve of positive and negative output voltage DC efficiency of 15%. B170PW01 B170PW02 B170PW03

2, the dynamic test

A sudden, abrupt or test load reduction

First with the analyzers’ disruptive power, “Measurement of no load, constant voltage phase and frequency of state, then a sudden increase in load 0-100% load reduction or sudden 100% 0, if the inverter output voltage transient -8% to 10%, and returns to steady state in 20 ms, this inverter index qualified if the inverter output voltage transient exceeds this range, they will have greater current outbreak, regardless of the load of the inverter or themselves are extremely unfavorable, while UPS does not use.

2, features test conversion

The main criterion converted by the converter or the AC power switch to municipal power inverter when the conversion feature. Testing the need for storage oscilloscope and can simulate changes in the electricity regulator. CLAA154WA01 HSD101PFW2 HT14X11

Thirdly, other routine tests

Overload test

The overload test is of great interest to users is an important indicator of the power of UPS. Overload tests are testing the capacity overload machine UPS, operate, although there were loads phenomenon, UPS is also able to maintain a certain time without damaging the equipment. Overload device must be tested equipment indicators, and less than 25 ° C ambient temperature. sony vgp-bps9a

Input voltage surge, protection against overvoltage test

Index by equipment to allow the input voltage range tested, the general UPS to allow 10% input voltage change, when the input voltage exceeds this range should be alert and proceed to feed battery, rectifier stops automatically when the input voltage is restored to the extent permitted noted, the device should be automatically restored to normal operation, the battery automatically discharged into the municipal power to run. In the battery and lift the automatic process, output waveform UPS should not be changed. sony vgp-bps9/b

Discharge test

Mainly to test the performance test battery discharge. Discharge test, it is necessary to record the discharge time; Secondly, we observed shock wave output voltage and the value of discharge protection, the third is to check if it is “late” batteries The battery will discharge before the test for 24 continuous hours of continuous load. sony vgp-bps9

What as basis for UPS power supply evaluation (part 1)

UPS power test main objective is to identify the actual UPS can meet the requirements of technical indicators. UPS tests generally comprise two types of static tests and dynamic tests. steady state test is empty, 50% of rated load and 100% of nominal load conditions, the test input, the output of each phase voltage, a voltage drop, power factor, efficiency, output voltage signal, distortion and output voltage frequency. Dynamic load testing is generally changing (usually chosen by the load of 000-100% and 100% -0), the output voltage test to test UPS waveform characteristics of UPS and dynamic path feedback energy. B154PW01 B154PW02 B154SW01

1, test the balance

The test is called the steady state is the device in the system “normal” test, generally measured waveform, frequency and voltage.

Waveform

Is this condition usually empty and full, the waveform observed is normal, with the extent of distortion measure the distortion of the output waveform voltage. Under normal conditions, and then the load resistance, measured with a distortion measure total output voltage harmonic content Xiangdui, products must meet the requirements defined generally below 5%. B156XW01 B156XW01 V.0 B156XW02

Frequency

Generally available observation oscilloscope frequency output voltage and the use of “disruptive power analyzer ‘measurements. UPS output voltage of the current frequency in general can meet the requirements. However, the frequency of the UPS system, the local oscillator is not precise enough, they can be unstable in the mains frequency, UPS monitoring the frequency of changes in output voltage. UPS output frequency accuracy generally in line with market power can achieve plus or minus 0.2%.

Output Voltage

UPS output voltage can be tested to judge by the following methods:

A voltage when the rated input voltage is 90%, while the output load or supply voltage from 100% to 110% rated voltage, output load is 0, the output voltage must be maintained at around 3% of nominal range. sony vgp-bps13 sony vgp-bps13a/b

B, rated voltage when the input voltage is 90% or 110%, the output voltage of a charge phase, the two other phases of the load to 100%, the output voltage must be kept above or minus three percent rated the extent of its phase must be stored at 4 degrees centigrade.

C, where the UPS DC input voltage plus or minus 15%, 0-100% output load changes, the output voltage must remain at the nominal voltage range of plus or minus 3 percent. The surface of the target with the previous indicators of repetition, but in fact it is more demanding than the previous target. This is because the control system changes the input signal in a wide range, revealing characteristics not linear to the output voltage does not exceed the allowable range, even higher requirements on the circuit. sony vgp-bps9a/b sony vgp-bsp13/s