UPS FAQs


Here are some of the most commonly asked questions you may find interesting or helpful. Drop us a line if your question is not found here.

An Un-interruptible Power Supply is a device that sits between a power supply (e.g. a wall outlet) and a device (e.g. a computer) to prevent undesired features of the power source (outages, sags, surges, bad harmonics, etc.) from the supply from adversely affecting the performance of the device.

A UPS has internal batteries to guarantee that continuous power is provided to the equipment even if the power source stops providing power. Of course the UPS can only provide power for a while, typically a few minutes, but that is often enough to ride out power company glitches or short outages. Even if the outage is longer than the battery lifetime of the UPS, this provides the opportunity to execute an orderly shutdown of the equipment.

Advantages: Computer jobs don't stop because the power fails. Users not inconvenienced by computer shutting down. Equipment does not incur the stress of another (hard) power cycle. Data isn't lost because a machine shut down without doing a "sync" or equivalent to flush cached or real time data.

A UPS traditionally can perform the following functions:

  • Absorbs relatively small power surges
  • Smooth out noisy power sources
  • Continue to provide power to equipment during line sags
  • Provide power for some time after a blackout has occurred

In addition, some UPS or UPS/software combinations provide the following functions:

  • Automatic shutdown of equipment during long power outages
  • Monitoring and logging of the status of the power supply
  • Display the Voltage/Current draw of the equipment
  • Restart equipment after a long power outage
  • Display the voltage currently on the line
  • Provide alarms on certain error conditions
  • Provide short circuit protection

Some people strongly recommend this, some don't. It depends on the situation. There are things that can go wrong with UPS’s, and they require periodic maintenance. As with all support contracts, you're generally spending a little extra money to reduce risk. This is worthwhile to you.

While the electronics in a UPS are likely to last for quite a while, the batteries will periodically need to be replaced. This will happen more frequently the more (and deeper) the batteries are cycled. Replacing the batteries every three years is a pretty typical vendor recommendation (but read the product details for authoritative information). Any UPS battery that has been in continuous service for five years probably should be considered suspect until proven otherwise.

Like any other electronic device, a UPS can fail. You need to have a plan for this. If you don't want to risk having to replace a failed unit at an inconvenient time, you might want to look into a support contract.

Basically. It's also got a power inverter and some other circuitry. It may also have a timer, thermometer or other gadgets.
Generally, this is not a good idea. If you ever measured the current draw of a laser printer during startup (and during printing) you'd likely be stunned at what it pulls. UPS manufacturers generally recommend that you not do this. Some UPS’s are available that are specifically intended for use with laser printers, but most don't (Our SS Pro Plus UPS is ideally suited for laser printer applications). At the very least, don't do this unless you have carefully sized your equipment and your UPS vendor has committed to supporting this particular configuration.
There are three typical types of UPS: OFF-LINE, ON-LINE, and LINE INTERACTIVE.
An Off-line UPS will supply power only when there is a power failure.
Under normal situations, a Line Interactive UPS will supply power from bypass through transformer. At this moment, the transformer becomes a charger. When power fails, the transformer will transfer battery power to AC output.
  • UPS reliability and stability
  • The excellent engineers and the ability of product creation
  • High efficiency and low noise
  • Suppliers’ reputation and financial situation
  • International safety approvals such as TUV, UL, CSA, and so on
  • Plant certifications such as ISO9001, ISO9002, and so on
Except for the blackout, there are Sags, Spikes, Surges, Noise & Transients - will make the PC or other high technical equipment damage or shorten the lifetime.
Normally, the UPS is used for PC, high technical equipment & medical appliances. Because most UPSs are designed for PC, so not all the equipment could be connected to it, especially, conducting loads just like cooling fans, refrigerators that have the motors. These kinds of equipment will damage the UPS. Moreover, a copy machine and laser printers that have huge starting current also should not be used with UPS. The huge starting current will negatively impact the capacity of UPS.
Most UPS use Lead-acid maintenance-free batteries. This kind of battery is sealed so the UPS can be located with any direction and it does not void the poison gas during charging and discharging. So it also could be an indoor installation.
The battery lifetime depends on the ambient temperature and frequency of charging and discharging. Higher ambient temperature and frequent charging and discharging will reduce batteries' lifetime. We offer one year battery lifetime guarantee. However, the battery lifetime is close to three years under normal use.
There are three major types of loads: Resistive load (Lamps); SPS load (PC power supply) & Conductive Load (Motors). All the types of load can be used with Pure Sinewave. However, only Resistive and SPS loads can be used with Modified Sinewave.
Except On-Line UPS, there will be a short transfer time between 2ms to 10ms for the power transformation with OFF-LINE & LINE INTERACTIVE UPS. Normally, when the blackout happens, the power supply of PC could continue the power for 16ms. Hence, most PC will still work functionally with the short transfer time.
UPS monitoring management is a software package to improve UPS efficiency. It helps users to control UPS and provide event records for the UPS. It also can automatically save files, shutdown operation systems, and shutdown UPS when power failure happens.
It is necessary to own monitoring software for improving UPS function. Generally speaking, it is necessary to know if the input of AC power and battery is normal. When Main Power is abnormal, computer will command orders such as automatically save files and shutdown systems according to UPS monitoring software whether user is there or not. For personal computers, when Main Power is abnormal and users are not there, files will be totally lost if battery is running out. Besides, it will shorten the life of computers and peripheral equipment. Not to mention the workstation. We can say that the loss is the same as that without UPS. Therefore, it will be perfect choice to have UPS with monitoring management software.

Currently, there are five communication interfaces in the market: (a) Contact closure (b) RS-232 (c) AS400 (d) SNMP (e) USB AS400 is the communication port exclusively designed for IBM computers. SNMP is the communication port that controls UPS through Internet without modem. Contact closure and RS-232 are two common communication ports we ever see in the market. The functions of these two communication ports are listed below:

Contact closure

  • Check if Main Power is normal
  • Check if battery voltage is too low
  • Auto save files

RS-232

  • Check if Main Power is normal
  • Check if battery voltage is too low
  • Auto save files
  • Check the UPS voltage, current, frequency, and capacity
  • Setting shutdown time
For RS-232 interface, the communication cable is a standard RS232 cable. The pin connection between the two terminals is in series. User can get it from the computer shop locally. For contact closure (DB9) interface, user could not buy it from local computer shop. It is a custom-made cable and user should contact your dealer for further information.
  • Make sure you use the right cable
  • Make sure the O/S is under the instruction
  • Make sure your UPS is working functionally
  • Make sure other programmes do not hold the COM port.
    Sometimes, the anti-virus program will also hold the COM port.
The WinPower software is only designed for Centralion UPS. Hence, you cannot use it with other UPS.
The last information showing on the screen is “It is now safe to switch off your computer ". It is the normal condition to shutdown the O/S. You will also find there is no "Scan Disk" function enables when you switch on the PC next time.
Yes, the WinPower software has this function to have the custom-made schedule.
The default setting of estimated backup time is 10 minutes. You can extend the time to get longer backup time. Moreover, the WinPower software has an intelligent control on the backup time. Once the setting of backup time is over the capacity then PC will still be closed normally when the battery low warning signal comes.
The serial number for the installation is not from the serial number of the UPS. You should enter the serial number listed in the manual to complete the installation.
The programme for the installation may be damaged or some files are missed. Please down load the software again then continue the installation again.
Please login to the software as an Administrator at first. Then you should go access “System "-> "Auto Search UPS" to re-detect the UPS again.
The software only supports USB port under Windows 98, 2000, XP and 2003.
The software is not available for the USB port of Apple MAC. It only supports the COM port now. Hence, you should use a USB-RS232 converter cable for it. You can purchase the converter cable in your local computer shops easily.
You have to change the setting in the BIOS of the motherboard of the PC. Normally, there would be an item which is named as “Power” or “Power Management Setup “in the BIOS setting sheet. In that sheet, you would find an item as “System after AC Back” or “AC PWR Loss Restart ". You just need to enable it then the PC will restart automatically when the UPS restart after the power loss.
The Winpower software supports Windows Family, Linux x86, Compaq True64, IBM Aix 4.3x, 5x, FreeBSD 4.x, UnixWare IA32, Sun Solaris/x86 2.6, 7, 8, 9, Sun Solaris/Sparc 2.6, 7, 8, 9, HP-UX 11.x, and MAC.