Distribution System Training

The objective of this tape is to present the factors which must be considered in “co-ordination” of protective devices.

After study of this video and associated workbook, the participant should be able to understand the following concepts and apply them in day-to-day work activities.

• The coordination task
• Sensitivity and selectivity
• Inverse time characteristic of overcurrent protection devices
• Fuse curves
• Minimum melt and damage curves
• Fuse coordination procedure
• Coordination of fuse with overcurrent relays
• Recloser application
• Recloser characteristics
• Fast and slow recloser curves
• Function of sectionalizers
• Voltage restraint sectionalizers
• Coordination of reclosers, sectionalizers, and fuses