Elektrovakteorie N2 — Document

April 2018 — N2 — Elektrovakteorie

N2 2018 Nated Engineering

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1.1Verduidelik die term gepantserde kabel (1\

1.2Gee DRIE voordele en DRIE nadele van die installasie van kabels in kanale ducts (3 + 3

1.3Bepaal die vollasstroom van driefasemotor van 380 V, 100 k W, wat

1.4Gee n moontlike verklaring vir die toelaatbare spanningsval tussen die toevoerpunt en enige uitgangspunt ( outlet point (1\

2.1Gee VYF basiese stappe om n las in n kabel te maak. (5\

2.2Verduidelik hoe om die geiser subkring in verdeelbord te identifiseer. (1\ 2.

2.4atter visuele aanduiding stel jou in kennis dat MSB ( MCB

3.1Tek netjiese, benoemde kringdiagram van die rotasie van

3.2oem TWEE van die vernaamste soorte binneverbindings ( internal connections (2\

3.3Maak netjiese, benoemde skets om die konstruksie van GS motor te

3.4ee die hoofnadeel van omtakmotor ( shunt motor

3.5Gee die hoofvoordeel van omtakmotor ( shunt motor (1\

4.1Verduidelik kortliks hoe draaiende magnetiese veld in driefasemotor geproduseer word. (4\

4.2oem VIER soorte aansitters wat die aansitstroom van groot induksiemotors beperk. (4\

4.3Wat is die funksie van motoraansitter (1\

4.4

5.1Verduidelik wat gedoen moet word met elektriese toerusting wat metaalraam of metaalomhulsels het ten einde gevaarlike elektriese skokke te voorkom.

5.2Verduidelik die term toerusting aarding equipment earthing

5.3

5.4Verduidelik hoe elk van die volgende items in buitenshuise substasie geaard word:

5.4.2

6.1Verduidelik die funksie van weerligafleier ( lightning arrester (3\

6.2Wat is die funksie van sekering ( fuse

6.3

6.4Beantwoord die volgende vrae oor fasewanbalans beveiliging phase imbalance protection

6.4.1Gee die doel van fasewanbalans beveiliging (1\

6.4.2Watter toerusting benodig fasewanbalans beveiliging? (1\ [10] 1104187210

7.1oem TWEE metodes wat deur sommige munisipaliteite gebruik word om huishoudelike geisers tydens spitsty dperke af te skakel. (2\

7.2Verduidelik die term maksimum aanvraag met betrekking tot die lewering van elektrisiteit. (2\

7.3at is frekwensiemeter (2\ [6] VRAAG6

8.1Driefase koumotor ( three phase squirrel

8.1.3Die spanning oor elke fasewikkeling van die motor Die stroomvloei in elke fasewikkeling Die lewering ( output power \van die motor as die rendement 94% is

8.2In gebalanseerde driefase deltakring is die fasespanning 250 V en die

8.2.1Die krag wat geneem word ( the power taken (5\ [1

9.1Verduidelik, met behulp van grafiek, die werking van diode in

9.2Verduidelik die term onderbrokestroom aanslag intermittent current rating

9.3Verduidelik hoe SBG ( SCR aan die gang gesit word (

Mark Allocation

Total100 marks

Sections12 + 15 + 12 + 10 + 6 + 10 = 65 marks

Paper information

TitleDocument

SubjectElektrovakteorie

LevelN2

Document typeQuestion paper

Year2018

MonthApril

Pages6

Downloads2

Examination context

Decade2010s

Years ago8y

SeasonAutumn (SH)

Start daySunday

Exam periodApril 2018

Days since exam3,114

About Elektrovakteorie examination preparation

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How to use this resource for revision

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For stronger examination practice, complete the paper without unnecessary interruptions and keep track of the questions that take the most time. Afterwards, review the memorandum and separate knowledge gaps from mistakes caused by interpretation, calculation, structure, or examination technique.

understanding question requirements

applying subject knowledge

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A practical revision approach

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