Switchgear Operation
Switches
Types of Switches
Properties
circuit breaker
interrupt short circuit currents
isolator
switch currents near zero
load disconnector
connect and interrupt load currents
Switching Failures
generator switched to ground
non zero current switched with isolator
load (consumer) disconnected
open busbar coupling when both busbar isolators of a feeder are closed
Switchgear Simulation
(please left-click switches to toggle state)
Exercises: Switching Tasks (try to avoid failures)
supply load from generator
disconnet line for maintenance
change busbar and/or generator
disconnect circuit breaker of the load feader for maintenance
Answer the following question
Which pieces of equipment can't be switched of for maintenance without disconnecting the load