UPS Sizing Calculations Course

  

Course Description:

This course is intended to prepare the target persons with the ability to perform Stationary UPS Sizing Calculations.



The targeted Persons:

Design engineers, new graduate engineers, under graduate engineering students.


Skills Development:


On completion of this course the target person will be able to:



  • Know the different Classification of UPS,
  • Know the different configurations, topologies & Distribution Architecture of UPS,
  • Know the different components of a UPS,
  • Know Transformer Arrangements in Practical UPS Systems,
  • Know the Evaluation Criteria for Selecting an UPS
  • make The UPS sizing calculations steps
  • Make Rectifier/Charger Sizing Calculations
  • Make Inverter sizing calculations & Static Switch Sizing
  • make The Battery sizing calculations
  • Select and size the UPS protective devices (CBs or Fuses) and cables
  • Size a generator set for UPS system
  • Make Battery Room Ventilation Calculations
  • Determine Floor Space Requirements for a UPS

 

 

Course Outline:

 

Subject

Article

Applicable Standards for UPS Systems

What is a UPS?

Why do we need a UPS?

UPS Rating

Classification of UPS:

1-Voltage range,

2-No. of phases,

3- Mobility,

4- Technological design,

 

Classification and Types of UPS – Part One

5- Physical Size/capacity,

6- Form factor/ configurations:

6.1- “N” System Configuration


Classification and Types of UPS – Part Two

 


6.2- “N+1” System Configuration, which includes:

  • Isolated Redundant Configuration (N +1)
  • Parallel Redundant Configuration (1+1)
  • Parallel Redundant Configuration (N +1)
  • Parallel Redundant Configuration (N +2) and so on

6.3- Parallel Redundant with Dual Bus Configuration (N+1 or 1+1)


Classification and Types of UPS – Part Three

 

 

6.4- Parallel Redundant with STS Configuration

  • Parallel Redundant Configuration (1+1) + STS
  • Parallel Redundant Configuration (N+1) + STS

6.5- System plus System 2(N+1), 2N+2, [(N+1) + (N+1)], and 2N


Classification and Types of UPS – Part Four

 

 

 

7- According to UPS Topology

7.1 Off-line or Standby UPS,

7.2 Line Interactive UPS,

7.3 Standby-Ferro UPS,

7.4 Online Double Conversion UPS,

7.5 The Delta Conversion On-Line UPS.


Classification and Types of UPS – Part Five

 

 

 

 


8- According to UPS Distribution Architecture

8.1 Centralized UPS Configuration,

8.2 Distributed (Decentralized) UPS Configuration,

8.2.1 Distributed UPS-Zonewise Configuration

8.3 Hybrid UPS Configuration.

Conventional (Monolithic) Vs Modular UPS System:

  • Deploy UPSs in parallel,
  • Deploy UPSs in Series,
  • Use modular UPS products.


Classification and Types of UPS – Part Six

 

 

Three Basic Configurations Of Mains And Bypass For A UPS System:

  • Single mains,
  • Single mains without bypass,
  • Dual mains.

9-According to Use of transformers with the UPS:

  • Transformer based,
  • Transformer less UPS,
  • Transformer less UPS with external input/ output transformer.


Classification and Types of UPS – Part Seven

 

 

 

Transformer Arrangements in Practical UPS Systems:

1-Transformer options for the “single mains” configuration

2-Transformer Options for the “Dual Mains” Configuration


Classification and Types of UPS – Part Eight

 

 

3- Transformer options for “single mains without bypass”


Classification and Types of UPS – Part Nine

 

Components of Online Double Conversion UPS:

1- Rectifier,

2- Inverter,

3- Energy Storage system:

3.1 Battery


Components of Online Double Conversion UPS– Part One

 

 

 

3.1.1 Battery Configurations

  • Serial Strings,
  • Parallel Strings.

3.1.2 Battery Size and Location

3.1.3 Battery Transition Boxes

3.1.4 Battery Monitoring

3.2 Energy Storage System – Flywheel

3.3 Energy Storage system – Super Capacitors

3.4 Hydrogen Fuel Cells

4- Static switch

Earthing Principles of UPS Systems


Components of Online Double Conversion UPS – Part Two

 

 

Evaluation Criteria for Selecting an UPS


Evaluation Criteria for Selecting an UPS-Part One

 


Example: Selecting an Uninterruptible Power Supply (UPS)

UPS System Ratings and Service Conditions

  • First: from IEC 60146-4
  • Second: according to American standards


Evaluation Criteria for Selecting an UPS-Part Two

 

 

The UPS sizing calculations steps

Stationary UPS Sizing Calculations – Part One

2- Rectifier/Charger Sizing Calculations

3- Inverter sizing calculations & Static Switch Sizing

4- The Battery sizing calculations

First: The Manufacturers’ methods, which include:

  • Method#1:Watts per cell method
  • Method#2:Watts per bank method
  • Method#3:Ampere per cell method


Stationary UPS Sizing Calculations – Part Two

 

 

 

 

Second: The IEEE methods of Battery Sizing Calculations which includes:

  • Method#1: The IEEE 485 method,
  • Method#2: The IEEE 1184 method.


Stationary UPS Sizing Calculations -Part Three

 


- UPS Backup time calculation

- Selection and sizing of UPS protective devices (CBs or Fuses)

 

Stationary UPS Sizing Calculations – Part Four


Selection of UPS Cables

Sizing of UPS Cables:

  • UPS Input Cables,
  • UPS Output Cables,
  • Neutral Conductors,
  • UPS to Battery Cables.

Sizing a generator set for UPS system


Stationary UPS Sizing Calculations – Part Five


 


Battery Room Design Criteria

Ventilation Design Criteria

Battery Room Ventilation Calculations:

  • NFPA method,
  • British (metric) units method.

Requirement of Air Conditioner for UPS


Stationary UPS Sizing Calculations – Part Six


 

Requirements for UPS Installation:

  • Location,
  • Ventilation,
  • Floor loading capacity,
  • Floor Space Requirements.

UPS Controls, Instruments, Alarms and Indicating Devices

UPS Testing Requirements


Stationary UPS Sizing Calculations – Part Seven


 

 

 

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