SP0509R01

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CIRCUIT BREAKER TESTING - JOB SAFETY ANALYSIS

Check this is the latest Process Zone version before use. Page 1 of 5 Reference SP0509R01 Ver 1Form Owner: Neil Dwyer, Manager Technic al Services

Ergon Energy Corporation Limited ABN 50 087 646 062Ergon Energy Queensland Pty Ltd ABN 11 121 177 802

Title: Circuit Breaker Testing

Purpose and Scope: Provide guidelines for testing of Circuit Breakers.

Staffing Resources: Staff will have the minimum requirement of an Electrical Fitter/Mechanic Licence and be trained in the safe use of the required test equipment. Workwill be carried out with a Safety Observer.

Documentation/References:AS 1931 1996 High Voltage Test Techniques Parts 1 and 2;AS 2006 1986 High Voltage A.C. Switchgear And Controlgear Circuit Breakers For Rated Voltages Above 1,000V;AS 2650 1986 High Voltage A.C. Switchgear And Controlgear Common Requirements;AS 2467 1981 Maintenance of Electrical Switchgear

Circuit breaker Manual / Manufacturers Drawings;Carry Out Field Testing SWP SP0506;Circuit breaker Testing JSA SP0509R01;Circuit Breaker Test Report SP0509C01Circuit Breaker HV Withstand Test Report SP0509C02.Circuit Breaker Testing Competency Assessment SP0509C03

Key Tools and Equipment:HV test equipment5/10kV insulation tester.Variable DC voltage supply as requiredTiming Equipment.Micro-ohmmeter minimum 50 amp capacity

Development Team: Based on recloser testing JSA developed by Paul Blyth, TonyLenz, Dean Maltby from Bowen, Robert Bates and Helena Tholsgard

Date Completed: 5 June 2003

Reviewed By: Robert Bates Date Completed:21 September 2004

Related SWP No.:SP0509 SWP Owner Approval:

Key Stakeholders:

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Risk ScoreTask

No.Task Step Hazard

Most Likely Breakdown Event

(Loss Of Control)

Most Likely Outcome (Incident

Outcome) ExistingControls

Additional/

AlternateControls

5.1 Visual Inspection Chipped or broken porcelaininsulators, sharp metal edges

Hazardous substances insulating oil

Failure to inspect circuitbreaker for hazards beforecommencing work

Cuts and lacerations Low Low

5.2 Insulation Resistance High Test Voltages Failure to keep all bystandersclear while testing

Minor shock anddiscomfort

Low

5.3 HiPot Test High Test Voltages Failure to keep all bystandersclear while testing

Failure to isolate, dischargeand earth after testing

Electric Shock, burns Low

5.4 Contact Resistance Heating from high test currents Apply test current forexcessive duration

Minor discomfort Low

5.5 Timing Contact with control and measurementvoltages

Failure to keep clear of livetest voltages

Failure to reduce or removevoltage sources beforeadjusting or moving testleads

Electric Shock, burns Low

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Existing Control Measures

Risk Ranking

C = Consequences E = Exposure P = Probabili tyTaskNo. Elimination Substitution Engineering Administration

Personal Protective

EquipmentC E P Risk Score

5.1 1 6 5 Low

5.2 1 4 5 Low

5.3 3 5 5 Low

5.4 1 5 6 Low

5.5

Control measures are in place as described in the JSA Carry Out Field Testing SP0506R01 and its relatedSWP SP0506 as well as the SWP Circuit Breaker Testing SP0509

PPE Longsleeve shirt andlong trousers,safety footwearand protectiveeyewear.

4 6 6 Low

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Additional/Alternative Control Measures

Risk Ranking

C = Consequences E = Exposure P = Probabil ityTaskNo. Elimination Substitution Engineering Administration

Personal Protective

EquipmentC E P Risk Score

1 6 5 Low

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SP0509R01