3 PHASE UPS SYSTEM

[NURBANI]

what is the basic requirement for building the 3 phase ups system and how the operation and function of it.

as the back-up system for critical loads how can we design that system be last long.

one more thing where can i link the related web site for this the design on ups system.

thank you.

 

[busbar]

Consider IEEE STD 446-1995 (R2000) Recommended Practice for Emergency and Standby Power Systems for Industrial and Commercial Applications
Developed to provide guidance to industrial users and suppliers of emergency and standby power systems. A/K/A “Orange Book”

 

[NURBANI]

for design 3 phase ups system what type of rectification did i must apply and how about the connection of the transformer that suit for the design.......where he harmonic distortion quite less and the effiiciency is good.

thank you

 

[dydt]

hi..

try to go to website of power semiconductor manufacturer...most of them provide information on designs of UPS...you can find them normally on the application notes...it may not be detailed but it will give you an idea how the author wants to design the UPS..

dydt

 

[jbartos]

Suggestions: There are various UPS architectures. E.g. one may specify UPS with isolated input power supply from output power supply over AC-DC-AC conversion. This UPS is independent from any power quality deficiencies on its input. This UPS is usually required for high quality power supply and high reliability; especially, if these UPS are redundant in parallel.
Different UPS architectures are included in Reference:
1. IEEE Std 241-1990 IEEE Recommended Practice for Electric Power Systems in Commercial Buildings", (Gray Book)
Figure 35 "Nonredundant UPS System Configuration" on Page 194
Figure 36 ""Cold" Standby Redundant UPS System" on Page 195
Figure 37 "Parallel Redundant UPS System" on Page 196
Figure 38 "Isolated Redundant UPS System" on Page 197
All above UPSs are good for powering critical loads

 

[jbartos]

Suggestion: The previous posting is continued since there are more UPS architectures that may be found useful, namely,
Different UPS architectures are included in Reference:
1. IEEE Std 241-1990 IEEE Recommended Practice for Electric Power Systems in Commercial Buildings", (Gray Book)
Figure 39 "Single-Module UPS System" on Page 198
Figure 40 "Parallel Capacity UPS System" on Page 199
Figure 41 "Parallel Redundant UPS System" on Page 199
All above UPSs are good for powering critical loads
Figure 42 "Dual Redundant UPS System" on Page 200
(Good for computers.)
Figure 43 "Isolated Redundant UPS System" on Page 201
(Good for critical loads.)
Figure 44 "Parallel Tandem UPS System" on Page 202
Figure 45 "Hot Tied Bus UPS System" on Page 203
Figure 46 "Super-Redundant Parallel System - Hot Tied Bus UPS System"
Figure 47 "Uninterruptible Power Supply with Dual Utility Sources and Static Transfer Switches"
etc. The above represents a good start to UPS architectures and configurations.