System Protection Technology

The objective of this videotape is to present and discuss the many factors involved in commissioning new power installations, placing particular emphasis on the testing of protective schemes.

After study of this tape and the associated workbook, participants should be able to understand the following overall concepts and apply them to their work activities. They will also be able to answer test questions on these subjects:

• Objectives of commissioning tests
• Coordination of commissioning activities
• Safety requirements
• The need for documentation
• Review of block diagrams
• Inspection of primary installation
• Review of protection schematics and wiring diagrams
• Checking of secondary wiring, IR and continuity
• Checking of control wiring, energizing the DC system
• Testing VTs for insulation, ratio, polarity
• Testing CTs for insulation, ratio, polarity, and excitation
• Testing CT connections
• Testing and calibrating relays
• Secondary injection tests
• Functional testing of protection schemes
• Primary injection tests
• Requirements prior to energization
• Tests for phasing and phase sequence
• In-service tests with load applied
• Company test procedures and records