electrical & instrumentation 2

8/8/2019 Electrical & Instrumentation 2

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Guidance Template for Alignment of Programmes to Unit Standards

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NAME OF ORGANISATION:

Title of Award:

Level:

Duration: Notional Learning time (Hours): Total Credits:

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Introduction

Target population and entrance requirements

Delivery modes and programme structure

BNVQF Unit Standard-based programme Page 1


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Elements and

Performance

Criteria

Knowledge and

understanding

Skill, Action, Task,

Performance

Attribute/

Attitudes

Context Appropriatetraining/Learning

Strategies

Appropriate

Assessment

Strategies

Unit Standard Title: Shut down and isolate electrical machines safely Code Number: 00316.01.01

Credit Value:Credits 3

Prepare forsafe shutdown andisolation

The effects of shut downon neighbouringmachines and equipmentare described inaccordance with safetyprocedures.

Operation sequence andfunction are establishedfor the machine and orequipment in accordancewith manufacturersspecifications .

All personnel affected bythe shut down procedureare advised inaccordance with

establishmentprocedures.

Types and magnitude ofhazards associated withthe shut down procedure

Describe the effects of shut

down on neighboring machines

and equipment.

Outline the operation sequence

and function for the machine

and or equipment

Explain how all personnel

affected by the shut down

procedure are advised.

Identify the types and

magnitude of hazards associated

with the shut down procedure

Accurate

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Complete safeshut downand isolationsequence

are identified. Hazardsmay include but are notlimited to moving parts,potential energy andpower source(s).

Machine and equipmentlock-off devices and tagsare used in accordancewith establishmentprocedures. Lock offdevices may include butare not limited to isolationof mechanical andelectrical drives, pipework, pressuresupply systems (oil, waterand product), rotatingequipment, electricalswitches, circuit breakers,mechanical and powerdriven valves andblanking plates.

. Machine and equipment

safety devices are usedin accordance with jobrequirements andestablishmentprocedures.

Stored or residual

Hazards:

Moving parts, potential energy

and power source (s)

State that machine and

equipment lock-off devices andtags are used.

Lock-off devices: Isolation of

mechanical and electrical

drives, pipe work , pressure

supply systems (oil, water and

product ), rotating equipment,

electrical switches, circuit

breakers, mechanical and power

Driven valves and blanking

plates.

Explain how the machine and

equipment safety devices areused.

Explain how stored or residual

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energy is dissipated orrestrained in accordancewith establishmentprocedures.

Machine and equipmentisolation is verified priorto commencingmaintenance work, andall relevant personnel areadvised.

Complete machine andequipment records forshut down and isolationin accordance withestablishmentprocedures.

energy is dissipated or

restrained.

State that machine andequipment isolation is verified

prior to commencing

maintenance work, and allrelevant personnel are advised.

Describe the completion of

machine and equipment records

for shut down and isolation



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Elements and

Performance

Criteria

Knowledge and

understanding


Performance

Attribute/

Attitudes

Context Appropriate

training/Learnin

g Strategies

Appropriate

Assessment

Strategies

Unit Standard Title:Demonstrate knowledge of circuit protection Code Number: 00315.01.01


Demonstrateknowledge ofcircuitprotectionterms andprinciples

The meanings of circuitprotection terms areexplained in accordancewith industry practice.

Protection terms includebut are not limited torated current, voltagerating, fusing current(fusing factor, trippingfactor), utilisationcategory, classes offuses and circuitbreakers, cut-offcharacteristic, time vscurrent characteristic,category of duty,discrimination, back-upprotection, rupturing

capacity (breakingcapacity), prospectiveshort-circuit current(PSC), coarse excess-current protection,Close excess-current

Explain the following

protection terms

Rated current

Voltage rating

Fusing current

Fusing factor

Tripping factor

Outline the Utilization and dutycategory of protective devices

Protective devices:

Fuses and circuit breakers

Utilization category:

Cut-off characteristic

Time vs current

characteristic

Duty category:

Discrimination

Back-up protection

Rupturing

capacity( breaking

capacity)

Prospective short-circuit

Accurate

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Assignment



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protection andsensitivity.

Relationship betweenfusing or tripping current,current rating, and fusingor tripping factor for aprotective device isstated in accordancewith standard practice.

Merits of providing close

excess-currentprotection are explainedaccording to currentregulations andstandards.

The effects of electricalfaults are described interms of the danger toPeople and property.

Electrical faults includebut are not limited toleakage current, overcurrent and short circuit;Effects include but arenot limited toElectromechanical

current( PSC )

Coarse excess- currentprotection

Close excess-current

protection and

sensitivity

State the relationship between

fusing or current, current rating

and fusing or tripping factor for

a protective device

Explain the merits of providing

close excess-current protection.

Describe the effects of electrical

fault in terms of the danger to

the people and property

Electrical faults:

Leakage current

Over current

Short circuit

Effects:

Electromechanical



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Demonstrateknowledge of

circuitprotectiondevices

energy, heat energy,damaged cables andequipment, fire,explosion and electricshock.

The need for rapiddisconnection of faultycircuits is explained inAccordance withstandard practice.

Protection devices aredescribed with the aid of

diagrams and referenceto construction andoperating principles.Protective devicesinclude but are notlimited to rewirable,cartridge and highrupturing capacity (HRC)fuses, miniature circuit-breaker (mcb), magnetic

and thermal overloadrelays, fuses (includingminiature glass cartridgetype), fusible links.

energy

Heat energy

Damaged cables and

equipment

Fire

Explosion and electric

shock

Explain the need for rapid

disconnection of faulty circuits.

Describe with the aid of

diagrams, the construction andoperating principles ofprotective devices.

Protective devices:

Rewirable fuse

Cartridge and high

rupturing capacity (HRC

) fuses

Miniature circuit

breaker ( mcb ) Magnetic and thermal

overload relays

Fuses ( including

miniature glass cartridge

type)

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Fuse cartridge type andsize are identified fromphysical or graphical

Representations ofcartridge markings.

Protection devices areclassified according totheir ability to provideeither coarse or closeexcess-currentprotection.

Time versus currentcurves of rewirablefuses, HRC fuses, andminiature circuitbreakers are comparedin terms of speed ofoperation and accuracyof calibration.

The effects of poorselection of protectivedevices are describedfor different faultconditions. Poorselection includes but isnot limited to underrated,

Fusible links

Identify the type and size of

fuse cartridge from physical or

graphical representations of

cartridge markings.

State those protective devices

are classified according to their

ability to provide either coarse

or close excess- currentprotection.

Compare the time versus

current curves of rewirable

fuses, HRC fuses, and

miniature circuit breakers in

terms of speed of operation and

accuracy of calibration

Describe the effects of poorselection of protective devices

for different fault conditions.

Poor selection:

Underrated



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overrated, incorrectutilisation category,classes of fuses andcircuit breakers, fusingor tripping factor,

rupturing capacity; faultconditions overload,short-circuit, earthleakage fault,mechanical overload,loss of one phase in amotor and excessiveearth leakage

A three-phaseprotective device isdescribed with referenceto construction,operating principle, andprotection affordedadditional to that of asingle-phase circuit.

Practicaldemonstrations aregiven of resetting orreloading protectivedevices, in accordancewith industry practice

Overrated

Incorrect utilization

category

Classes of fuses and

circuit breakers

Fusing or tripping factor

Rupturing capacity

Fault conditions:

Overload

Short- circuit

Earth leakage fault

Mechanical overload

Loss of one phase in a

motor and excessive

earth leakage

Describe a three- phase

protective device with reference

to construction, operating

principle and protection

afforded additional to that of a

single- phase circuit.

Demonstrate practical theresetting or reloading protective

devices.



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Demonstrateknowledge of

residualcurrent devices(RCDs)

and safety procedures.

RCD terms areexplained according to

current regulations andstandards and industrypractice. RCDs includebut are not limited toearth-leakage circuit-breaker (ELCB), residualcurrent-operated circuitbreaker (RCCB),residual current-operated circuit breakerwith overcurrent

protection (RCBO) andground-fault interrupter(GFI).

An RCD is describedwith reference toconstruction andprinciple of operation inaccordance withmanufactures

specifications.

Procedures for testingthe operation of RCDsare described accordingto current regulationsand standards.

Explain the RCD terms

RCDS: Earth-leakage circuit-

breaker (ELCB )

Residual current-

operated circuit breaker

(RCCB )

Residual current-

operated circuit breaker

with overcurrent

protection ( RCBO )

Ground- fault interrupter(GFI )

Describe the construction and

principle of operation of an

RCD

Describe the procedures fortesting the operation of RCDs.

Organized

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exercises

TestsAssignment



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Select circuitprotectiondevices forelectricalapplications

Precautions to be takenwhen testing circuitscontaining RCDs aredescribed. Precautions

include but are notlimited to warning labels,disconnection of RCDwhen using a highvoltage tester andaccidental tripping ofRCD when testing otherparts of the circuit.

Situations requiring RCDprotection are statedaccording to currentregulations andstandards.

Protection device isselected to meet theapplication requirementsin terms of electricalprotection characteristic,speed of operation, resetmethod, and currentregulations andstandards.

Describe the precautions to be

taken when testing circuits

containing RCDs.

Precautions: Warning labels

Disconnection of RCD

when using a high

voltage tester

Accidental tripping of

RCD when testing other

parts of the circuit.

State the situations requiring

RCD protection.

Select protective devices in

terms of electrical protection

characteristic, speed of

operation, reset method to meet

the application requirements.

Organized

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Assignments

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exercises



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Relative merits ofdevices are stated andcompared where more

than one device meetsthe applicationrequirements

State and compare relative

merits of devices where more

than one device meets theapplication requirements.



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Elements and

Performance

Criteria

Knowledge and

understanding


Performance

Attribute/

Attitudes


Strategies

Appropriate

Assessment

Strategies

Unit Standard Title: Use cutting tools and machines in the performance of electrical installation and maintenanceCode Number: 00314.01.01 Credit Value:Credits 2



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Set up anduse a drillpress.

Set up anduse a lathemachine

Material is secured tightly inaccordance with safetyprocedures andmanufacturer'sspecifications.

Drill bit is selected andsecured in the chuck inaccordance with jobrequirements, safetyprocedures andmanufacturer'sspecifications

Material is secured tightlyin accordance with safety

procedures.

Required drill speed isselected in accordance withmaterial being cut andmanufacturer'sspecifications.

Drill is put to use inaccordance with safeworkshop practices..

Material is secured tightly inaccordance with safetyprocedures.

Cutting tool is selected andsecured in the chuck inaccordance with job

Demonstrate the safety

procedures for tight securing of

material

Select and secure the drill bit in

the chuck with job

requirements, safety proceduresand manufacturers

specifications

State that the material is secured

tightly with safety procedure.

Select the required drill speed in

accordance with material being

cut and manufacturersspecifications

Use the drill with safe

workshop practices.

State that the material is secured

tightly with safety procedure.

Select and secure the cutting

tool in the chuck.

Organized

Accurate

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Organized

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Analytical

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Set up and

use a benchgrinder

requirements and safetyprocedures.

Required chuck speed isselected in accordance withmaterial being cut.

Lathe is put to use inaccordance with safeworkshop practices.

Grinding wheel is inspectedfor cracks and to ensurethat the edge is square inaccordance with safetyprocedures.

Rest is set in accordancewith manufacturer'sdirections and safetyprocedures.

Guard is checked for

integrity and tightness inaccordance with safetyprocedures.

Material is ground inaccordance with safeworkshop practices.

Select required chuck speed in

accordance with material being

cut.

Use lathe in accordance with

safe workshop practices.

Inspect the grinding wheel forcracks and ensure that the edge

is square in accordance with

safety procedures.

Set the rest in accordance with

manufacturers directions and

safety procedures.

Check the guard for integrity

and tightness.

Ground the material accordance

with safe workshop practices.

OrganizedAccurate

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Set up anduse a power

saw

Power saw blade is set upand tensioned inaccordance with safetyProcedures.

Material is secured tightlyin accordance with safetyprocedures.

Power saw is put to use inaccordance with safeworkshop practices.

Power saw is switched off

and cleaned after use inaccordance withindustry practice

Set up the power blade and

tension.

Secure the material tightly with

safety procedures.

Use the power saw with safe

workshop practices.

Switch off and clean the power

saw after use with industrypractice.

Organized

Accurate

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Elements and

Performance

Criteria

Knowledge and

understanding


Performance

Attribute/

Attitudes


Strategies

Appropriate

Assessment

Strategies

Unit Standard Title:Install earthing systems for multiple earthed neutral installations Code Number: 00313.01.01


Plan earthingsystems for

MENinstallations

Earth electrode system isplanned in accordancewith current regulationsand standards. Planningincludes but is not limitedto the selection of size,type, position,configuration of electrodeor earth material.

Earthing cable and routeare planned inaccordance with currentregulations andstandards.

All metal work requiringbonding in accordancewith current standardsand regulations isidentified in the building.

Plan earth electrode system

Planning:

Selection of size

Type

Position

Configuration of

electrode or earth

material.

Plan earthing cable and route

Identify all metal work

requiring bonding in building

Organized

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Installearthing

systems forMENinstallations

Earth electrode, earthinglead, and earth bar are

installed in accordancewith current regulationsand standards.

Metalwork is bonded inaccordance with currentregulations andstandards. Bonding isdone on water pipes, gaspipes, waste pipes,showers, sinks and

switchboard enclosures

Earthing and bondingconnections are made inaccordance with currentregulations andstandards. Connectionsmust be clean, secure,protected againstcorrosion, protectedagainst mechanicaldamage, readilyaccessible and labelledas required.

Install earth electrode, earthing

lead and earth bar.

Bond metalwork on waterpipes, gas pipes, waste pipes,

showers, sinks and switchboard

enclosures

Clean, secure, protect against

corrosion, protect against

mechanical damage of earthing

and bonding connections.Readily accessible and labelled

earthing and bonding

connections as required.

Organized

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Test earthingsystems for

MENinstallations

Earthing system is testedin accordance with

current regulations andstandards.

Test results aredocumented inaccordance with currentregulations andstandards, and companyrequirements.

Testing confirms that allrequirements of currentregulations andstandards have beenmet, and that the earthingsystem is safely toconnected.

. A certificate ofcompliance is completedby a registered tradesperson in accordancewith current regulations

Test the earthing system

Document the test results

Confirm the testing that all

requirements of currentregulations and standards have

been met, and that the earthing

system is safely to connect.

Complete the certificate of

compliance.

Organized

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Information on benchmarking

Assessment

Certification and progression pathways

References and Bibliography



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