How to test the performance of UPS power supply, how to test UPS power supply

1. Turn on the computer server and other equipment, remove the wires of the mains, and then start pinching the stopwatch to see how long the energy consumption is;

2. Unplug, plug in, dial out, plug in the mains wires, and plug in ......Repeat this nn times to see if the machines are working properly;

3. Connect the voltmeter at the output end of UPS, input a very unstable voltage at the input end of UPS (it is estimated that this is difficult), and detect whether the voltage at the output end is relatively stable, the more stable the better.

However, the equipment that has been used for 5 years, especially the battery pack, may be relatively old, so it is important to check it. Replace when necessary.

Addendum: Yes, Article 3 is to test the performance of UPS itself, in fact, the current host power supply has a certain anti-surge ability, and the performance of the server's power supply is better, so in the general power environment, UPS mainly plays the role of uninterrupted power supply (to prevent power outages). Under normal circumstances, the fluctuation of the mains voltage is processed by UPS, and then processed by the host power supply itself, and the impact on the system is very small.

The machine has been used for 5 years, it is recommended to do some simple tests on it:

1.When the mains is normal, cut off the mains to see if the UPS has an output, if the output voltage is about 220V, it is normal.

2.Detect the battery, continue to use the battery to supply power to the load after cutting off the mains power, I don't know how long the backup time of your UPS is configured at that time, if the configuration is 1 hour, it will be good to be able to use it for 30 minutes after 5 years.

If the machine is faulty, it is recommended to buy a new one, the current ** is not expensive, if you feel that the battery backup time attenuation is too great, you can consider replacing the battery, and the waste battery ** can also be sold for a lot of money.

All have to be tested: batteries are generally recommended to be used for three years!

Host: It is not recommended to fold it privately, there is still high voltage after the host is powered off! Generally, factory workers use load discharge during testing! If necessary, you can ask factory professionals to come to the door for maintenance.

East Power Mr. Dong.

Go to the UPS professional forum to find information.

There are professional test steps inside.

The typical technical indicators of UPS, such as AC voltage, input frequency, power factor at the input end, rated capacity, power factor, output voltage, output current, output frequency, overload capacity, etc., can ensure the power supply quality of UPS. However, the load of UPS is mostly non-linear load, and UPS itself draws energy from the power grid, and the load of the grid is also nonlinear. Due to the severe distortion of the current waveform of the nonlinear load, the crest ratio and total harmonic distortion of the waveform are important technical indicators that must be examined by UPS.

For the measurement of nonlinear loads with serious waveform distortion, it is difficult for ordinary electrical instruments to accurately measure, and ZLG Zhiyuan Electronics PA300 series high-precision power analyzer can accurately measure non-sine waves, and at the same time, it can continuously, quickly and accurately carry out harmonic analysis. Cleaning and inspection. UPS Under normal use, the maintenance of the host is very little, mainly dustproof and regular dust removal.

Especially in the dry climate area, there is more dust in the air, and the fan in the machine will bring the dust to be deposited in the machine, and when the air is humid, it will cause the host to control disorder, cause the host to work abnormally, and inaccurate alarm, a large amount of dust will also cause the device to dissipate heat poorly. In general, it should be thoroughly cleaned once a quarter. The second is to check whether the connectors and plug-ins are loose and in contact with each other when removing dust.

Measure the voltage of the battery pack, replace the unqualified battery, check the operation of the fan and detect and adjust the system parameters of the UPS. Wipe the battery frequently with a soft cloth to keep the surface of the battery clean.

2) Replenishment and floating. Regular maintenance can prolong the service life of UPS, for a long time in the state of only charging and not discharging UPS (the mains power is very stable), the battery in the UPS has no chance to work, and the battery may be damaged due to long-term floating charge. The energy in the battery may run out or be close to running out for some reason.

1. The nominal output voltage value of UPS with single input and single output or triple input and single output is 220V; The three-in, three-out UPS is 380V, and it adopts three-phase three-wire system or three-phase four-wire system.

Output mode. 2. Adjustable output voltage range: The output voltage of large and medium capacity UPS can be adjusted at least 5% from the rated value of UPS. Small-capacity single-phase UPS is generally adjusted by dial moderation, and the typical adjustable range of output voltage is 208 220 230 240V

3. Static stability of output voltage refers to the size of the output voltage change caused by the change of input voltage, load change and temperature when UPS is working stably. Typical values are 1% for medium- and high-volume UPS, and 2% or 3% for medium- and small-volume UPS.

4. The static stability of the output voltage refers to the time when the UPS suddenly increases or decreases the full load at 100% or executes the mains bypass power supply channel and inverter.

When the power supply channel is converted, the fluctuation value of the heat and mutual voltage. The transient voltage fluctuation value of medium and large capacity UPS should be less than 5%, and the transient voltage fluctuation value of small capacity UPS should be less than 6% 8%.

5. The dynamic response recovery time of the output voltage refers to the input voltage is the rated value, the output is the linear load, and the output current is zero to the rated current.

Or when the rated current changes to zero, the time it takes for the UPS output voltage to return to the range of voltage regulation accuracy, most UPS should be between 10 and 30ms.

6. The output voltage frequency UPS allows the synchronous tracking range of the mains, and the UPS with large and medium capacity is generally 50Hz (; The small-capacity UPS is generally 50Hz (, the synchronous tracking rate of the mains allowed by the UPS, and the large-capacity UPS is generally; Medium and small capacity UPS is generally the frequency stability when working in the output state of the inverter, and small capacity UPS is generally 50Hz; Large and medium capacity UPS are generally 50Hz (.

7. Output voltage waveform product distortion Due to different uses, the output voltage is not necessarily a sine wave.

It can also be a square wave.

Waveform distortion is generally for the sine wave output UPS, which refers to the output voltage harmonics.

The quadratic of the valid value.

The ratio of the square root to the RMS of the fundamental. When with linear load, the harmonic distortion of the total voltage of large and medium capacity UPS is less than 2%, and the harmonic distortion of small capacity UPS is less than 3%, with a peak coefficient of 3; 1. For medium and large capacity UPS, the total voltage harmonic distortion is less than 5%, and the maximum single harmonic distortion is less than; For small capacity UPS, the total voltage harmonic distortion is less than 7%.

The three methods can basically judge the collapse of the UPS battery.

1. Analog discharge method. According to the battery capacity, such as 60ah, according to the safe discharge standard, that is, one-tenth of the capacity current, 6 amperes discharge. Make a high-power resistor, the resistance value is 12 (v) 6 (a) 2 ( ) use a multimeter to measure a section of 20 ohms on the electric furnace wire of more than 1000 watts, and then measure one-tenth with a ruler, make a mark, and reliably connect two batteries with spine wiring at the two outer ends of the mark.

The multimeter is placed in the DC voltage gauge pen and connected to both ends of the resistor. The battery cable connected to the red watch pen is temporarily in contact with the positive end of the battery, and the other is in contact with the negative end, and the connection is connected for 10 seconds, if the voltage is kept above the volt, the battery is basically good.

The most effective and fast way to test the "driving force" UPS battery capacity is to use the 10-hour discharge rate to test the UPS battery capacity, and the test method is as follows:

1.The fully charged "drive" lead-acid battery stands for 1h 24h and begins to discharge in 25 5 environments.

2.Before discharging, the voltage and internal resistance of the "driving force" lead-acid battery are measured and recorded in the floating state of the "driving force".

3.Before discharge, all operators should be disclosed, including technical disclosure and safety disclosure.

4.The terminal voltage of the "driving force" lead-acid battery should be measured before and after the start of discharge, and the current should be measured during discharge, and its current fluctuation should not exceed 1% of the specified value

5.During the discharge period, the terminal voltage and room temperature of the "driving force" lead-acid battery should be measured, the measurement time interval of the 10h rate test is 1h, the measurement time interval of the 3h rate test is 1h, the measurement time interval of the 1h rate test is 10min, and the end of discharge should be measured at any time to ensure that the termination voltage time is accurately determined.

Input and output voltage current, charging voltage, battery discharge voltage. Analyze whether the working status of the UPS is normal.

To measure with AC resistance load, follow the steps below:

1. Set the absorption current of the AC load to make the output power of UPS reach the rated power;

2. Gradually increase the current of the electronic load erected in the shed, so that the output of the UPS reaches the sum difference state of overcurrent protection, or the output voltage of the UPS begins to decrease.

At this time, the output of UPS is the maximum overload power. You can go to Zhou Ligong's side to find out.

One uses a false negative to carry the mold load step by step to increase the action of the protection circuit. The other is the false load while measuring the sensitive pants with a digital meter to change the false load, when the output bridge is quietly below the nominal lower limit.