This 57-minute DVD explains basic concepts of why control equipment is needed, what is being controlled, what equipment is used to provide control, and how the equipment works. Although specific types of control equipment are used as examples, the emphasis is placed on general procedures that apply to the majority of control equipment systems.
Control Functions, Modes, and Equipment - 8 minutes
States two basic reasons why control is needed in a substation. Describes how control is provided. Identifies the equipment typically used to provide control.
Voltage Control - 4 minutes
States why it is necessary to control voltage. Describes how a simple voltage control system works.
Distribution Feeder Fault Control - 11 minutes
States why it is necessary to control the effects of faults. Describes how the effects of distribution feeder faults can be controlled using an overcurrent relay protective system and a feeder reclosing relay control system.
Transmission and Sub-Transmission Feeder Fault Control - 10 minutes
Describes how the effects of feeder faults can be controlled using an impedance relay protective system. Identifies the difference between controlling the effects of feeder faults with an impedance system and controlling the effects of feeder faults with an overcurrent system.
Station Fault Control - 6 minutes
Describes how the effects of station faults can be controlled using a differential relay system. Identifies the differences between controlling the effects of station faults with a differential system and controlling the effects of station faults with an overcurrent protective system.
Source Circuit Fault Control - 9 minutes
Describes how the effects of source circuit faults can be controlled using a directional relay protective system. Describes how the effects of opens on a source circuit can be controlled using a voltage relay protective system. Describes how the duration of a source circuit outage can be minimized by an autoclosing relay protective system.
Routine Checks of Control Equipment - 9 minutes
Lists items typically checked during a routine inspection of substation control equipment. Identifies what various fault indications mean.