Inverter and UPS System: Operation, Maintenance and Troubleshooting Course

Introduction:

A (UPS) is a device that sits between a power supply (e.g. a wall outlet) and a device (e.g. a computer) to prevent undesired features of the power source (outages, sags, surges, bad harmonics, etc.) from the supply from adversely affecting the performance of the device. Where a company regards electrical power as critical then there will be a need for a continuous or backup power system. The installation of a UPS will provide the necessary continuity. There are however problems with these installations when there is a need for maintenance especially the use of by-pass. Power Quality compatibility problems may cause failure, which was the reason for the original UPS installation.

Course Objectives:

By the end of the course, participants will be able to:

• Understand the basis for the use of a UPS
• Understanding of the reasons for, and benefits of, a UPS and its battery system
• Understanding how a UPS works
• Analysis of critical loads and the benefits of supporting them with a UPS
• Understand Critical Load Applications

Who Should Attend?

Electrical Engineers, technicians, and maintenance professionals should benefit from this course. Electrical Engineers Involved in writing specifications and evaluating submitted tenders by UPS supplies should find this course quite beneficial to their professional performance. Also practicing engineers should find this course quite helpful and useful.

 Personnel who should attend are:

• Electrical engineers
• Maintenance technicians
• Electrical supervisors
• Engineering professionals
• Project engineers

Course Outlines:

Introduction to Resilient Systems

• UPS power sources and regulations
• Critical loads and equipment categories
• Power quality and mains failure
• Standby generator set characteristics
• Generator sizing and compatibility
• Protection devices and switches
• UPS or generator

Introduction to Reliability

• Early life or burn-in
• Useful life or normal operating period
• Wear-out or old age
• Meantime to failure (MTTF)
• Meantime between failures (MTBF)
• Availability and mean time to repair (MTTR)
• Measuring Reliability for UPS Systems
• Mean Time Between Failure
• Infant Mortality UPS Failures
• Random UPS Failures
• Wear Out Failures
• Mean Time to Repair
• Categorizing UPS Loads and Load Types
• Uninterruptible Power Supplies (UPS)
• Objectives of the utilization of UPS
• Specifications
• Methods and Options of Technologies
• Off-Line or Standby UPS
• On-Line or No Break UPS
• Line Interactive UPS
• Installation and testing of UPS
• Maintenance of UPS
• Design criteria and selection of UPS

Static UPS

• Characteristics of online and offline UPS
• Double conversion UPS
• Delta conversion UPS
• Transformer based and transformer less UPS
• UPS operation modes
• UPS components functionality and filters
• UPS rating and power factor
• Parallel systems and redundancy

Rotary UPS and Maintenance

• Components of diesel rotating UPS or DRUPS
• Operations of DRUPS
• Types and configuration of DRUPS
• Commercial static UPS and operation modes
• UPS maintenance
• Generator maintenance
• Generator size considerations
• New generation standby generator set

Batteries Types and Chargers

• Lead-acid battery characteristics
• Nickel-cadmium battery characteristics
• Storage and care of batteries
• Choosing battery size and location
• Charging methods and type of chargers
• Battery care
• Battery safety
• Battery maintenance

Battery Monitoring System and Preventive Maintenance

• Merits of the battery monitoring system
• Battery monitoring system architecture
• Condition monitoring for UPS system
• UPS safety and hazards
• Harmonics
• UPS glossary
• Case study