DE6420

Module code

DE6420

Module title

Protection

Prescription

To provide the students with an understanding of electrical power system fault protection concepts for both MV & HV systems.

Programmes

EN1603
SC1101

NZQA Level

Level 6

NZQA Credits

15

Delivery method

Not Web enabled

Learning hours

Total learning hours: 150

Resources required

Learning Outcomes: 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.
Assessment Criteria: Assignments, Tests35
Laboratory (Practical)25
Examination40

DE6420 – Protection