Fault Findings And Protective Devices N6 — Document

April 2019 — N6 — Fault Findings And Protective Devices

N6 2019 Nated Engineering

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🎯 100 marks ⏱️ 3h 📄 5 pages 📝 40 items found 📚 1 topics

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Questions — A Preview of What to Expect in the Document

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Q1— Section header —

1.1Etc.

1.1.1Cost

1.1.2Voltage

1.1.3State of charge

1.1.4Voltage reliability

1.1.5Installation

1.1.6Commissioning

1.1.7Maintenance

1.1.8Storage

1.1.9Reliability

1.1.10Discharge

1.1.11Overcharging

1.1.12Current

1.1.13Alternating current

1.1.14Memory (14 1\ (14\

1.2Name FOUR test that can be carried out on a lead acid cell. (4\ [18]18

Q2— Section header —

2.2In graded time protection, discrimination is being achieved between through and section faults by means of graded time setting. State and describe THREE

Q3— Section header —

3.1Study the diagram below and answer the questions Fully e xplain the operation of the relay circuit breaker system with

3.1.1Relay (3\

3.1.2Circuit breaker (3\

3.1.3Current transformer (2\

3.1.4Battery (3\

3.217

Q4— Section header —

4.1State SIX requirements for transformer to operate in parallel. (6\

4.2Give THRE E reasons that could cause the B uchholtz relay to operate. (3\

4.3Make a sketch and e xplain how you would carry out a crackle test to check if there is water in transformer. (5\

4.4At wh ich setting would you set a top oil thermometer to set off an alarm or to trip?

Q5— Section header —

5.1State SIX causes of faults due to external damage to cable (6\

5.2State FIVE limitations that t he Murray loop test method has compare to other methods of locating

5.3Why is it important to do a spike test on cable before cutting it after the fault has been found? (4\

5.4State SIX advantages of using a gas blast circuit breaker (SF6\her than an air or oil circuit breaker. (6\ [21]21

Q6— Section header —

6.1In digital trouble shooting the basic essentials and procedures are very important. State 10 of these principles. (10\

6.2Name TWO ways to switch off an SCR. (2\

6.3What is logic pulser (1\ [13] TOTAL: 10013

Topics Identified

Business Plan

Mark Allocation

Total100 marks

Sections18 + 15 + 17 + 16 + 21 + 13 = 100 marks

Paper information

TitleDocument

SubjectFault Findings And Protective Devices

LevelN6

Document typeQuestion paper

Year2019

MonthApril

Pages5

Downloads4

Examination context

Decade2010s

Years ago7y

SeasonAutumn (SH)

Start dayMonday

Exam periodApril 2019

Days since exam2,751

About Fault Findings And Protective Devices examination preparation

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A practical revision approach

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File size231.8 KB

Pages5

Archived on8 September 2026

File age47d

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FingerprintA191868FD37E

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