UPS Systems


1-day course

CPD Credit: 7 hours, C1 / C2

Course Overview

The aim of this course is to give electrical engineers an understanding of the design and operation of the UPS systems and how they are configured with other elements of the electrical power system to provide an uninterruptible supply to critical loads.

This course covers the selection and design of UPS systems for mission critical applications such as hospitals and data centres. The module is primarily focussed on static systems but covers rotary systems briefly.

Learning Objectives

At the end of the course attendees will have learned:

Fundamental principles of the operation of the UPS systems

Modes of operation, reliability and redundancy

The pros and cons of static and rotary systems

Benefits of modular over block systems

Battery Systems


Part 1 - UPS System Fundamentals

Purpose of the UPS, Standards

System description / internal components

Modes of Operation

Reliability and Availability, MTBF, MTTR

Redundancy - N, N+1, 2N etc.

Types - static / rotary

Requirements for Parallel Systems

Standalone Block v Modular systems

Part 2 - Power Conversion



Static Bypass

Discrimination and Short-Circuit Capacity

External Manual Bypass system

UPS Cabinet

Cooling and ventilation requirements for UPS rooms

Part 3 - Battery System

Battery Options - VRSLA, Lion, etc.

Battery Charging

Batteries Cabinets and Racks

Battery Management systems

Part 4 - Rotary Systems

Motor Generator Systems

Diesel – DRUPS systems

Part 5 - Testing the UOS System

Load bank testing

Factory Test:

Site Acceptance Test:

Who Should Attend?

This course will benefit electrical engineers and contractors involved in the supply chain of electrical services for mission critical installations

Trainer’s Profile

Brendan Dervan is a Chartered Engineer with over 40 years’ experience in all aspects of mechanical and electrical building services including design, installation, commissioning and maintenance. After completing an electrical apprenticeship in 1982 he went on to study electrical engineering in DIT.

He has worked in M&E consultancy at senior engineer / director level since 1990. In 1999 he started his own M&E consultancy, Dervan Engineering Consultants (DEC), which merged with Cundall in 2016. His Company provided M&E consultancy and project management services to a diverse range of clients in both the public and private sectors. In 2013, Brendan completed an MSc in Energy Management with TU Dublin. His thesis researched the improvement of energy efficiency in existing data centres.


  • “Excellent”
  • “Another excellent and practical course by Brendan. Using his great notes and his practical real-world experience. Thank you all.”
  • “Very well presented, current and solid.”
  • “The course was well paced and delivered with great enthusiasm from the instructor, the material was relevant and very detailed.”

Please contact the Team for further information on scheduled course dates and In-Company options. You can reach us by phone: 01 665 1305 or email