Docstoc

UPS PPT 2K804 04 Revision no

Document Sample
UPS PPT 2K804 04 Revision no Powered By Docstoc
					                    PPT/2K804/04
      Revision no.: PPT/2K403/02




UPS
                                                                                                                                                           Revision no.: PPT/2K804/04



Concept UPS

• UPS is an abbreviation of Uninterrupted Power Supply.
• A UPS draws AC power from the commercial AC line and
  processes it to a required condition, at the same time charging
  the battery which is connected to the UPS
• Even if the AC mains fail, it provides an output voltage (without
  any interruptions) from the battery sources.




                                                                                 UPS UNIT

     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                          Revision no.: PPT/2K804/04



Concept UPS (contd.)

• Spikes
   – Spikes are very high voltages which are caused due to the
     switching ON or switching OFF of a large electrical load.
• Surges
   – Surges are over voltages that last for more than one sine wave
     cycle.
• Sags
   – Sags are under voltages that last for more than one sine wave
     cycle.
• Brown-Outs
   – Brown-outs are the low voltage conditions that can be present
     even for several hours. This is often created when the power
     demands exceed to capacity of the power supply.


    © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                           Revision no.: PPT/2K804/04



Concept UPS (contd.)

• Black-Outs
   – Black-outs are nothing but no-power conditions, caused due to
     several factors like, short circuits, fuse blown no voltage in the AC
     main etc.
• Harmonic Distortion
   – It is the deviation of the wave shape from a pure sine wave.
• Frequency instability and Noise are some of the other
  problems which way cause problem to the system.
• The UPS can be broadly classified into two categories.
   – Rotary type
   – Static type

     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                          Revision no.: PPT/2K804/04



Rotary Type

• Rotary Type
   – Rotary type is the earliest type of UPS.
   – This kind of UPS is replaced by the static type because of its
     disadvantages like huge size, lot of noise and the need for regular
     preventive maintenance.




                                                               Rotary type UPS
    © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                          Revision no.: PPT/2K804/04



Static Type

• Static Type
   – The static type of UPS is known for compactness and silent
     operation as they make use of electronic components.
   – The different types and their basic design principles are as
     mentioned below.
• Standby UPS / Standby Power Supply
   – Standby UPS is also called as standby power supply (SPS).
   – They are sometimes called off-line UPS.
   – In this type of Ups, primary power source is line power from the
     utility and secondary power source is battery.
   – Standby UPS are usually available in a size range of up to about
     1000 VA
   – Following shows the block diagram of Standby UPS.(fig                                                                                                        22.5)

    © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                           Revision no.: PPT/2K804/04



Static Type (contd.)




     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                           Revision no.: PPT/2K804/04



Static Type (contd.)

• Line-Interactive UPS
   – In this type of UPS ,separate battery charger, inverter and source
     selection switch is replaced by a combination of
     inverter/converter.
   – This inverter/converter both charges the battery and converts its
     energy to AC for the output as required.
   – The main advantage of this design is that inverter/converter unit is
     always connected to output,powering the equipment.
   – It is available in sizes up to 3,000 VA or so.
   – It is superior to standby UPS, but it still has transfer time,does not
     provide good protection as online UPS.
   – Following shows the block diagram.

     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                           Revision no.: PPT/2K804/04



Static Type (contd.)




     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                           Revision no.: PPT/2K804/04



Static Type (contd.)

• Online UPS
   – Sometimes called as true UPS.
   – In the online UPS the primary power source is the UPS’s battery,
       and utility power is the secondary power source.
   – They are typically used for large server,backing up multiple pieces
       of equipment in data centers.
   – They are available in sizes from about 5,000 VA up to hundreds of
       thousands of VA
   – Aside from cost, a disadvantage of the online UPS is its
       inefficiency.
   – Following shows block diagram Fig 22.7, 22.8

     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                           Revision no.: PPT/2K804/04



Static Type (contd.)




     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                           Revision no.: PPT/2K804/04



Common Specifications of UPS

• General
   – UPS Type
   – Load Rating
• Input Specification
   – Input Voltage
   – Nominal Frequency
   – Input Connection
• Output Specification
   – Output Voltage
   – Output Waveform Type
   – Transfer Time

     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                           Revision no.: PPT/2K804/04



Common Specifications of UPS (contd.)

• Battery Specification
   – Battery Type
   – Battery Capacity
   – Typical Battery Life
   – Typical Run Time at Full Load
   – Time at Half Load
   – Typical Recharge Time
   – Battery Expansion
• Other
   – Indicators and Alarms
   – Control and Monitoring Hardware and Software
   – Certifications

     © CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute
                                                                                                                                                      Revision no.: PPT/2K804/04




                                                    Design & Published by:
      CMS Institute, Design & Development Centre, CMS House, Plot No. 91, Street No.7,
                                          MIDC, Marol, Andheri (E), Mumbai –400093
                                                           www.cmsinstitute.co.in

© CMS INSTITUTE, 2006. All rights reserved. No part of this material may be reproduced, stored or emailed without the prior permission of Programme Director, CMS Institute

				
DOCUMENT INFO
Shared By:
Tags:
Stats:
views:64
posted:9/23/2011
language:English
pages:14