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UNINTERRUPTABLE POWER SUPPLY
(UPS)
OPERATION, MAINTENANCE & TROUBLESHOOTING
A Short Course
By
Dr. Eng. Mohamed El-Shimy Mahmoud
Ain Shams University
Faculty of Engineering
Electric Power and Machines Department
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Introduction
In industrial process today, reliability of equipment is very
important. Power
supply must be able to cater the need of industrial process. In
case of power
failure, backup power supply system must be able to support the
main process
plant. This is to ensure smooth operation and product quality.
In order to do this,
uninterruptible power supply (UPS) system can be used to ensure
the reliability,
power quality (PQ), stability and consistency of the entire
system.
There are often cases that the power back-up system is not well
selected,
incorrectly installed, operated, maintained, and in other cases
do not work
properly when needed and this failure caused losses in term of
time and money
to industries. A system that be able to monitor this power
back-up system can
detect any abnormal activities occurred to the system. In
addition, the system
can prevent any fault that may affect the whole operations.
The main purpose of this training course is to provide a
practical detailed
guidance for facilities engineers in selecting, installing,
troubleshooting, and
maintaining an uninterruptible power supply (UPS) system.
Target Audience
UPS and control engineers and technicians.
Plant Maintenance / Operators / Supervisor / Superintendent.
Industrial Engineers.
Technical maintenance employees.
Electrical Engineer / Supervisor,
Instrument Engineer / Supervisor, and
Professional power system Engineers.
Languages
Supplementary Text: English
Presentations: English
Oral explanations: English/Arabic
Course Objectives
The main objectives of the course are summarized as follows:
1. Understanding and assessment of power supply reliability.
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2. Understanding and analysis of sources, and effects of
different power
quality (PQ) disturbances
3. Analysis different power distribution system configurations
and their
relation to power supply reliability.
4. Understanding and analysis of different configurations of
practical
interruptible power supply (UPS) systems and selection among
them.5. To provide detailed guidance in installing and operating
interruptible
power supply (UPS) systems.
6. To provide detailed guidance in maintaining interruptible
power supply
(UPS) systems.
COURSE OUTLINES
Day 1
Course Introduction and Brain storming
Improving Reliability and Power Quality with Standby Power
Supplies
o Introduction
o Power supply Reliability
o Classification of Power Quality Disturbances
o Standby power supply devices
Duplicate Feeder from the Grid
Engine generating sets (EGS)
Battery storage
Uninterruptible power supply (UPS) systems
o Energy sources
Day 2
UPS Configurations for 7 X 24 Continuous Power Facilities
o Separating the Essential and Nonessential Loads
o Special equipment to support continuous operation
o Defining failure in a 7 24 facility
o Reliability and availability as tools in evaluation of
critical facilities
o Critical distribution system configurations
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o Reliability and availability of critical distribution
system
configurations
UPS Configurations for 7 X 24 Continuous Power Plants
o Introduction
o Typical configurations of UPS systems for power generating
station
loads
Application Considerations
o Charging Methods
o Service Conditions
o Equipment Rating
o Output Ripple
o Output Regulation
o Fusing
o Surge Voltage Withstand Capability
Day 3
UPS Selection
Determine the general need for an UPS.
Determine the purpose of the UPS.
Determine the power requirements.
Select the Type of UPS.
Determine if the safety of the selected UPS is acceptable.
Determine if the availability of the selected UPS is
acceptable.
Determine if the selected UPS is maintainable.
Determine if the selected UPS is affordable.
Static UPS system ratings and size selection
Determining static UPS system rating.
Battery sizing
Computation sheets.
Static UPS system selection criteria.
Rotary UPS system ratings and size selection
Determining rotary UPS system rating.
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Motor and generator ratings.
Flywheel sizing.
Rotary UPS system selection criteria.
Day 4
Construction and installation of static UPS systems
o Construction features of static systems.
o Installation requirements.
Construction and installation of rotary UPS systems
o Construction features of rotary systems.
o Installation requirements for rotary systems.
Power distribution and equipment grounding and
shieldingrequirements
o Power distribution equipment.
o Grounding.
o Computer power centers.
o Shielding.
o Radio frequency interference (RFI).
o Noise and noise reduction methods.
Testing and start-up
o Installation inspection.
o Individual component testing.
o Visual and electrical wiring inspections.
o Energizing and test of the UPS system.
o Test forms.
o Troubleshooting - Possible failures and corrective
actions.
Test equipment
o Use of maintenance personnel.
o
Use of diagnostics.
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o Suggested lists of test equipment and accessories.
Day 5
Types of Maintenance
Maintenance for UPS systems
o Safety.
o Preventive maintenance.
o Corrective maintenance
o Recognizing impending problems.
o Troubleshooting.
o Spare parts availability.
UPS battery maintenance
o Maintenance costs.
o Maintenance access.
o Preventive maintenance.
o Maintenance procedures.
o Maintaining flooded lead-acid cells.
o Maintenance considerations.
o Maintaining valve-regulated lead-acid cells.
o Ni-cad cells.
o Safety.
Recommendations for Future Investigations Related to the
Course
Subjects.
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