MG6047 – Protection

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Module code
MG6047
Module title
Protection
Prescription
To provide the students with an understanding of electrical power system fault protection concepts for both MV & HV systems.
Programmes
  • SC1001
NZQA Level
Level 6
NZQA Credits
15
Delivery method
  • Web-Enhanced
Learning hours
Directed hours
60
Self directed hours
90
Total learning hours
150
Resources required
Learning Outcomes
On successful completion of this course, the student should be able to:
1. Demonstrate and understand operating principles of CTs and VTs in terms of various connection types and industry practice.
2. Demonstrate knowledge and understanding of protection concepts for generators, aerial conductors, power cables, transformers, busbars and motors
3. Demonstrate knowledge and understanding of the various fault types that occur in electrical power systems both LV, MV and HV.
4. Describe operation and application of the different power system protection equipment types under common protection scenarios.
5. Demonstrate awareness of safety considerations and safe working practices in relation to power protection equipment.
6. Demonstrate knowledge and understanding of digital protection and control systems and basic substation design.
Content
• Demonstrate knowledge and understanding of typical industry terms, unit and zone protection, discrimination, reliability, selectivity, speed of operation, sensitivity, stability, prospective short circuit currents (psc), primary protection, backup protection, relay pickup current, instantaneous relays, inverse time relays, inverse definite minimum time relays, definite time relays, translay systems (pilot), graded.
• Describe and apply the types and classes of CT, VT & CVT to typical industry scenarios.
• Demonstrate awareness of the characteristic curve for a CT. (e.g. magnetisation curve, knee point saturation, protection verses metering types, ratios).
• Demonstrate awareness of safety matters in regards to an open circuited CT.
• Describe and apply relay setting(s) to an IDMT electromechanical relay and modern IED relay.
• Demonstrate knowledge and understanding of the various fault types that occur in electrical power systems, for both MV and HV.
• Demonstrate knowledge and understanding of protection systems for generators, over-head power lines, power cables, transformers, busbars and motors.
• Demonstrate awareness of protection SLDs, SCADA and related communication systems modern IED relays (IEC61850), and relay symbols (ANSI, IEC and DIN).
• Demonstrate knowledge of basic substation design protection.