【 Weak current College 】 UPS uninterruptible power supply of maintenance and normal maintenance 】

UPS power source is the distribution of chemical power, UPS uninterruptible power supply or low quality level of the work depends primarily on the
Their chemical properties of the power supply, and the correct use and careful maintenance.
1. overhaul of STAND licensing UPS-500
The symptom of a STAND licensing UPS-500-uninterruptible power supply, switching power supplies disabled rebooted a few days later, only heard machine
The crack in the shell internal "snapped" relay how-the power of the normal display lights (NOR-MALVAC) has no light, and power
Voltage low indicator (BAT-TERYLOW) blinks non-stop.
Troubleshooting open enclosure check relay, no problems found. On a same model of relays, and power is still
The same phenomenon. Then check the battery, the UPS's battery by two 12V 7Ah battery pack,. Remove the battery
The following are checked and found one set of batteries of part of the single-frame has been cracked, electrolyte has dried up. Measure the voltage 7.2V.
Another group of skin intact, its voltage 10.5V. You can determine the UPS power could not be started because the battery voltage is too low
.
As one of the battery pack in the shell, which has been broken down for maintenance, on shell good one with capacity to live
, First of all to recharge its 0.7A voltage to rise rapidly, rising to 5 minutes, then use 15.5V 0.5A discharge, to
Voltage 9.6V, then 0.5A charging 12h to 0.5A discharge, time, and its capacity for 5h still 2.5Ah. After several cycles
Charging and discharging, the voltage can also increase. According to the following rules of conduct charge and discharge cycles: 0.5A charging 12h, 0.5A discharge to 9.6V only,
5 the charge and discharge cycles. 5 time loop charge and discharge capacity is 2.6Ah, 2.8Ah, 3.2Ah, 4.5Ah, 4.8Ah.
From the above results, the battery capacity is increased. Therefore, use the following methods for 5 times loop charge
Discharge.
To charge 12h 0.7A, 0.7Adischarge to 9.6V only for 5 times the charge and discharge cycles. 5 time loop charge and discharge capacity are
4.9Ah，5.5Ah，5.6Ah，6.2A.h，6.2A.h。
Rupture due to a battery shell, not available from the market to buy a similar battery 6.2Ah capacity (12V,
7.0Ah) installation with more than half a year, no problems found.
2. UPS uninterruptible power supply normal maintenance
To UPS uninterruptible power to function correctly, the use of the following 10 questions.
1.UPS uninterruptible power supply power matching on appropriate allowance, such as for load-matching 800W UPS power, its power
Should buy more than 1000w.
2.UPS uninterruptible power supply should avoid frequent power-on shut down, the best time is in a power-on State.
3. new UPS uninterruptible power supplies before use to supplement on battery power, because the UPS in the sales process, the battery in
Constantly self-discharge, its capacity has been consumed a large part, if not timely replenishes, not only affect the normal
Use, also will shorten battery life. Battery recharging of the batteries line up, under the battery that
A certificate of specific methods for charging. General is the constant voltage charging each battery control voltage 2.30-2.35V,
Limit the initial current not exceeding 0.25C5A (C5 can use batteries rated capacity to calculate the exact number) to avoid burnout
Battery. Charging current continuous 3h unchanged is sufficient, you can put to use, charging duration is 12-24h.
4. If the city has been in a normal power supply, UPS uninterruptible power supply, there is no work opportunities, the battery has
May long float and damage. Therefore, for a long time without UPS uninterruptible power supply to regular people forced to work,
So not only can activate the battery, you can test whether the UPS uninterruptible power supply, in the normal state and makes operator
Familiar with the use of the UPS power supply system.
5.UPSuninterruptible power supplies use immediately to restore the charge, even if the battery back to their normal state. Charging methods
Are: constant voltage 2.35 ~ 2.40V limit not to exceed the initial current 0.25C5A, in 25 ℃, the total discharge
Battery sufficient need 18-24h. If you do not have the power drop, according to the current of persistent changes to terminate flag.
6. If the UPS's battery as non-maintenance-free batteries, but also the proportion of regular inspection solution and repair electrical fluid volume, timely
Electrolyte or distilled water.
7.UPS power in use, each month you want to check a floating charge voltage of single cell of a floating charge voltage lower than 2.20V,
A balanced response to the entire set of battery charging. In 25 ± 5 ℃ environment, limit the initial current not exceeding 0.25
C5A, constant voltage 2.35 ~ 2.40V, charging 24 ~ 48h.
8. If the user configuration for long-time battery pack, the distribution of the charger should have both a constant pressure and constant current features, not
Should use only the charger with constant pressure function, so as not to affect the battery life.
9. external battery pack to the UPS range should be as short as conductor cross-sectional area should, as far as possible, to increase the amount, minus the conductive
Small power loss on the line, especially when working in high-current, circuit of loss cannot be ignored.
10. frequently wipe with a softCloth, wipe the battery to keep the battery clean surface.
In short, UPS power problem is largely the battery issue, as long as the correct use of the battery, and often on battery
For maintenance, we can keep it in good condition.