This 6-hour virtual training is designed for engineers and technicians involved with protective relaying. Knowledge of fault current including symmetrical components is a must for protection engineers and engineers involved with engineers who specify electrical equipment. Any analysis of system events involving protective relaying requires a sound knowledge of fault analysis.
- Calculation of three phase faults using Ohmic method
- Worked-out example using Ohmic method
- Per unit method for simplifying fault current calculations
- Worked-out example using per unit method— 3ph, ph-ph, and ph-ground
- Typical values of per unit impedances for generators, motors, transformers, etc.
- Basic concept of symmetrical components
- Using symmetrical components to calculate fault currents
- Worked-out example using symmetrical components
- Fault current relationship involving different transformer connections
- Worked-out example using a commercial software
- Symmetrical and unsymmetrical components of fault current
- What is DC offset?
- Response of relays to DC offset
- Relay response depends on time elapsed since fault inception
- Fault current duties experienced by interrupting devices such as fuses, breakers, etc.
- Evaluation of interrupting devices based on first cycle duty and symmetrical duty
This training will be presented by Ed Khan of Doble Engineering Company.
CEU credits are available.
NETA CTDS can be requested directly from NETA upon presentation of the course completion certificate.