This course focuses on building a solid understanding of busbar protection schemes, covering the structure, core concepts, and operating functions of both high-impedance and low-impedance protection systems.
Protection Schemes
Busbar Protection Drawing
Level
Expert
Course Modules
Course topics cover:
Busbar high impedance protection theory.
Busbar low impedance protection theory.
Busbar high impedance circuit (CTs, Metrosil, CT wire supervision, and series resistance).
Busbar low impedance circuit (bay units and central unit).
Current loop to protection relays.
CT shorting and isolating facility.
Difference between trip relay and lockout relay.
Interface with the circuit breaker trip coil.
Trip circuit supervision circuit.
Input and output signals to protection relays.
Reading, understanding, and analyzing alarms from protection relays.
Maintenance and troubleshooting of busbar high impedance protection scheme.
Maintenance and troubleshooting of busbar low impedance protection scheme.
