|  | 1. | What 
            type of topologies are employed in online ups configurations? | 
         
          |  |  | To 
            satisfy the requirements of various applications and from the view 
            point of criticality in operation, different topologies are employed 
            in Online ups. The complexity and sophestication increases in ascending 
            order. Hotstandby online ups configuration:
 
 
 | 
         
          |  |  |  | 
         
          |  |  | This configuration comprises of two units of online ups's 
              (named online ups1 & online online ups2). When online ups1 is delivering power to the load, 
              online ups2 remains idle. In case of failure in the inverter of online ups1, static 
              switch is enabled thereby providing uninterrupted power to the load 
              through online ups2. online ups1 runs in synchronism with online ups2, ensuring no break 
              transfer from online ups1 to online ups2. Under healthy conditions, the batteries 
            get charged through their corresponding rectifiers.             | 
         
          |  |  | Parallel redundant online ups configuration: | 
         
          |  |  |  | 
         
          |  |  | Online ups 1 
            & online ups 2 are paralleled together through a paralleling unit. The 
            output load is shared equally (50%) by both the Online upss under healthy 
            conditions. Both the Online ups systems are synchronized with bypass. Upon 
            failure of online ups1, the entire load is taken care off by online ups2 & vice 
            versa. The bypass static switch is enabled only when the both online ups 
            systems fail, providing immediate power to load. The batteries are 
            independently charged through their respective rectifiers. | 
         
          |  |  | Truth 
            Table:
 | 
         
          |  |  |  | 
         
          |  |  | 
               
                | b | Static 
                    Switch | Result |   
                | Online ups 1 
                  & 2 healthy | OFF | Load 
                    is shared in equal propotion (50%) by both online ups.  |   
                | Online ups 1 
                  healthy & online ups2 trip | OFF | online ups1 
                    handles entire load |   
                | Online ups 2 
                  healthy & online ups1 trip | OFF | online ups2 
                    handles entire load |   
                | Online ups 1 
                  & 2 trip | ON | Load 
                    works on Bypass |  | 
         
          |  |  |  | 
         
          |  |  | Critical non-critical system of online ups | 
         
          |  |  |  | 
         
          |  |  | Online ups 1 & online ups 2 deliver power to the critical & 
              non-critical loads respectively under healthy conditions. online ups 1 synchronizes 
              with online ups 2 & online ups 2 synchronizes with the bypass. In case of a 
              critical inverter failure, critical load works on online ups 2 through enabled 
              STSW1, simultaneously transferring the non-critical load to Bypass 
              by activating STSW3 & inhibiting STSW2. The restoration of the 
              critical inverter will be responsible for retransferring the loads 
              of their corresponding inverters. The batteries are charged through 
              their corresponding rectifiers. 
 
 | 
         
          |  |  | Truth 
            Table of Online ups : | 
         
          |  |  |  | 
         
          |  |  | 
               
                | b | STSW1 | STSW2 | STSW3 | Result |   
                | online ups 1 
                  & online ups 2 healthy | OFF | ON | OFF | Critical 
                    load on online ups 1Non Critical load on online ups 2
 |   
                | online ups .1 
                  trip & online ups 2 healthy | ON | OFF | ON | Critical 
                    load on online ups 2Non Critical load on Bypass
 |   
                | online ups .2 
                  trip & online ups 1 healthy | OFF | OFF | ON | online ups 2 
                    handles entire load |  | 
         
          |  |  |  | 
         
          |  | 2. | Is 
            Online ups better ? | 
         
          |  |  | Online ups provides better overall power protection 
              to your computers and peripherals. This protection includes power 
              conditioning, regulated voltage and frequency and zero transfer 
              time to battery during mains failure. 
             | 
         
          |  |  |  | 
         
          |  | 3. | How 
            do I install my Online ups? | 
         
          |  |  |  
            Online ups needs to be installed under supervision of a qualified 
            technician.Your supplier of Jet Electro Online ups can install it for you.
 Jet Electro also provides necessary assistance to your electrical 
            contractor.
 Note: Never Try to install the online ups yourself because it has some necessory steps which you don't know and this is a hi-risk job because of lack of technical information due to very high DC voltage (battery), By doing so the warrantee also void.
 | 
         
          |  |  |  | 
         
          |  | 4. | What 
            about After Sales Services of online ups? | 
         
          |  |  | Every 
              online ups needs to be serviced every 6 months to ensure its proper operation 
              and battery condition.
 We are proud of our 
              reputation for customer service
 We have a range of maintenance plans to suit every customer requirements 
              from simpler repair to annual service contracts with guaranteed 
              response time.
 And 
              every customer of Jet Electro has free access to our customer support. 
               | 
         
          |  |  |  | 
         
          |  | 5. | What 
            is Load Crest Factor of online ups? | 
         
          |  |  | A pure sine waveform has a peak value, which is 
              1.414 times the RMS value indicated on a voltmeter. A resistance 
              or any linear load connected to such a voltage source draws currents 
              having similar waveforms and hence has a crest factor of 1.4. As 
              against this, the non-linear loads as described above may demand 
              currents whose peak value to RMS ratios are 2 to 5 or more. This 
              ratio of peak to RMS is termed as the crest factor, and is indicative 
            of the degree of non-linear load handling capability of the online ups.             | 
         
          |  |  |  | 
         
          |  | 6. | What 
            is Static Regulation of online ups ? | 
         
          |  |  | A regulated voltage source such as inverter section 
              of online ups is expected to maintain the voltage at a predefined 
              level, irrespective of changes in supply, 1.e. DC input voltage 
              or load current levels. The percentage deviation of the output, 
              as a result of load or dc input change,after the output voltage 
              has settled to a new level is defined as the static or steady state 
              regulation. 
 | 
         
          |  | 7. | What 
            is Dynamic or Transient Regulation of online ups? | 
         
          |  |  | The percentage deviation of the output from its 
              steady state value immediately following a disturbance such as sudden 
              change of DC supply voltage or load current is termed as dynamic/transient 
              regulation. This deviation is generally much larger than the steady 
              state value specified as voltage regulation, and incidentally is 
              a measure of the speed of response of inverter control system. Since 
              by defination this is a transient quantity, not only the deviation 
              but the time to bring the voltage back to the steady state regulation 
              level is also an important index of performance. Jet Electro's Online 
            ups have the Dynamic Regulation on Output voltage.             | 
         
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