Uninterruptible Power Supply (UPS) Systems Electrical Taining Forum

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Course Duration: 2 Days

Course Description:
This two-day technical course begins with a discussion of the need for UPS systems. It then covers the relative comparisons between various UPS topologies and their modes of operation. The batteries used for UPS systems are covered next. How a battery works, their maintenance, safety and testing is throughly discussed.

A solid working knowledge of the typical electrical components found within a UPS is developed before exploring how AC is converted to DC and then inverting DC back to AC. When all of the above elements of a UPS are understood, a theoretical rectifier and inverter feedback loop are throughly discussed. This will be followed by a trouble shooting exercise. Students are given failure scenarios where they work in groups to find which circuit component has opened, shorted or significantly changed in value to produce the alarm condition described. The course finishes with a general discussion on UPS system trouble shooting.

Some working knowledge of basic electrical engineering principles is required, although this will be revised at the beginning of the course. Real-life experience in working with batteries and UPS systems will enable the workshop to be placed in context.

Satisfactory completion of the two-day version of this course satisfies the requirements of the Engineering Institute of Canada for the award of 1.4 Continuing Educations Unit credits.

Who Should Attend:
This course is recommended for:

Electrical Engineers
Electrical Maintenance Tradespeople & Technicians
Instrumentation and Control Engineers
Power System Protection and Control Engineers
Building Service Designers
Data Systems Planners and Managers
Other electrical personnel involved in the maintenance industrial, commericial and institutional power systems.

Course Outline:

I. Introduction to UPS Systems

Power conditioners
Uninterruptible power systems
Power quality source alternatives
Power disturbance cost comparisons

II. Three General Types of UPS’s

Kinetic (Motor Generator Sets)
Flywheel
Static and Components
Rectifier
Batteries
Inverter

III. Three types of Static UPS’s

Traditional UPS
Static UPS
Static UPS with Bypass

IV. UPS Operation Overview

The Need for UPS System
Power System Disturbances
Basic Type of UPS Systems

V. Introduction to Batteries

Primary Batteries
Secondary Batteries

VI. Lead Acid Batteries

Chemistry
Different types
Capacity Factors
S-Curves
Battery Safety and Maintenance
Float and Equalize Voltages
Load Testing

VII. Nickel Cadmium Batteries

Chemistry
Battery Types
Capacity Factors
Battery Safety and Maintenance
Float and Equalize Voltages
Load Testing

VIII. Passive Electronic Components

Resistors Circuits
Capacitor Circuits
Inductor Circuits

IX. Semiconductors

Diodes
SCR's
Transistors

X. Logic Gates

AND/NAND Gates
OR/NOR Gates
Inverter Gate
D Type Flip Flop
XOR/XNOR Gates

XI. Operational Amplifiers

Inverting Op Amp
Non-inverting Op Amp
Differential Op Amp
Unity Gain Op Amp
Summing Op Amp
Integrating Op Amp
Comparator Op Amp

XII. AC to DC Conversion

Full Bridge
Three Phase
Six Pulse

XIII. DC to AC Inversion

Quasi Square wave
PWM waveform

XIV. UPS System Overview

Rectifier Stage
Inverter Stage

XV. UPS System Troubleshooting

Basic Use of Test Equipment
Rectifier Troubleshooting
Inverter Troubleshooting

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