Isolation, Lock Out, Tag & Test Risk Management Process

Transcription

1 Welcome Isolation, Lock Out, Tag & Test Risk Management Process

2 HSEQ System Electrician Legally cannot work live Reduce the risk of harm Isolate and Lockout Prevent others from switching the supply back ON Consumer and Others Reduce risk of harm Understand Electricity kills Understand that Electricians must legally turn the power off More information: Electricity (General) Regulations 2012

3 Legislative and Industry Principle: WARNING: ALL ELECTRICAL CONDUCTORS AND PARTS, INCLUDING NEUTRAL AND EARTHING CONDUCTORS, SHALL BE TREATED AS ENERGISED UNTIL PROVEN DE-ENERGISED TEST BEFORE YOU TOUCH More information: Electricity (General) Regulations 2012

4 Workplace Statistics * Work related injury and illnesses cost $60.6 billion, about 4.8% of GDP As at 28/04/2014 Contributing factors for electrical deaths involving customer installation or appliances/equipment in Australia : 80% Unsafe work practices or worker inattention 20% Failure of equipment or wiring * Safework Australia s Key Work Health & Safety Statistics 2014 report for financial year

5 Risk Management Process Identifying the hazards Assessing and prioritising the risks; and Applying control measures to the identified risks

6 1. Identify the hazards Hazards can arise from: The design, construction, installation, maintenance and testing of electrical equipment or electrical installations Design change or modification Inadequate or inactive electrical protection Where and how electrical equipment is used The age of electrical equipment and electrical installations

7 2. Assessing and prioritising the risks Work must be planned and organized to minimize the risks Conduct a written risk assessment before starting work to assess all the risks that might cause harm or damage. Work should not proceed if the risk assessment indicates that risks cannot be sufficiently controlled All workers need to be made aware of the hazards of the tasks and the control measure to mitigate them.

8 3. Applying controls Hierarchy of Controls 1. Eliminate the Hazard - Get rid of the dangerous machine More Effective 2. Substitution - Replace the machine with a safer one 3. Isolate - Keep the machine in a closed room and operate it remotely 4. Engineering Attach guards to the machine to protect users 5. Administration - Train workers how to use the machine safely 6. PPE - Wear gloves and goggles when using the machine Less Effective

9 Isolation Before commencing work a worker must: IDENTIFY Positively identify the relevant electrical equipment and conductors, all of their energy sources and the isolation points. ISOLATE Isolate electrical equipment and conductors from all energy sources at the circuit source. SECURE To stop switch or device from accidentally being operated, you must use additional component like a clip, screw, bolt, pin or padlock, disconnection that will prevent it from being reenergised. TEST Is the circuit DEAD

10 Test Before commencing work a worker must: Sequence of tests for DEAD 1. BEFORE Test instrument for correct voltage on a known source 2. DURING Test between all conductors and a known earth Test between all conductors 3. AFTER Re-test instrument for correct voltage on a known source Discharge, where necessary, any stored energy, e.g. capacitors

11 Notify Before commencing work a worker must: 4. Identify and secure the work area by: Erecting barriers or warning signs; and Advising all personnel the secure location of the work area 5. START WORK

12 Isolation and lockout tools Examples of isolation aides

13 Fault Finding or Testing Managing the risk from electrical hazards HAZARDS Electric shock Arc, blast and flash burn injuries Hazardous areas Combustibles - Gases, vapours, dust, tools etc Other factors Confined spaces, multiple source of supply, damp, height etc NOTE: Regulatory authorities and legislation in some jurisdictions may have requirements for the use of a safety observer during fault-finding work.

14 Fault Finding or Testing Managing the Risk from Electrical Hazards ACCESS THE RISK Do you need to isolate? Is the person conducting the work competent? What procedures have you put into place to prevent the possibility of simultaneous contact with conductors at different voltages or to earth? Do you need to install suitable barriers? Is test instrument suitable, tested and maintained properly? Personal Protective Equipment (PPE)

15 Fault Finding or Testing Managing the Risk from Electrical Hazards ACCESS THE RISK Work conducted from a stable work position Do you need a safety observer? Will your risk assessment create new hazards? Do you know what to do when working on current transformers? Do you have full load current when inserting fuses or closing links? For unfinished work is the workplace left in a safe state? Is electrical equipment returned to service in its original or better state?

16 Controls for unfinished work If leaving the work site with unfinished work it must be left in a state that is safe for others to access. Terminating exposed conductors and where necessary, providing appropriate mechanical protection of restraint Affixing safety or information tags Install barriers or barrier tape to keep unauthorized persons out of the worksite Inform relevant parties that the work is not complete and advise of the potential hazard Take precautions to ensure that electrical installations and equipment cannot come energized Ensure that switchboards and equipment are clearly and correctly labeled Provide sufficient information for workers to allow them to safely continue the work

17 Re-Energisation of Electrical Installations and Equipment Notify all relevant persons that testing is about to commence or supply is about to be restored. A visual inspection is to be conducted to ensure that all tools, surplus material and wastes have been removed and the work site has been reinstated. Visual inspection and tests required by AS/NZS 3000 shall be carried out. Applicable work permits should be cancelled.

18 Re-Energisation of Electrical Installations and Equipment Continued: Applicable personal tags and locks shall be removed. Re-energization as appropriate is carried out. Functional testing as required, e.g. phase rotation, are carried out Confirmation that all guards and covers are reinstated. NOTES: AS/NZS 3017 provides guidance on testing of low voltage electrical installations. It is recommended that the earth be connected first followed by the neutral and the actives

19 Safety Equipment and Tools All safety equipment and tools are to be: visually inspected prior to use, and if found defective, not to be used and tagged as defective regularly maintained and tested Insulated Tools and Equipment shall: be rated for working conditions in good order regularly maintained and tested not be used if any doubt exists that their insulation might not be adequate

20 Insulated barriers, covers and mats Barriers shall: be of a suitable material to effectively separate electrical workers from adjacent energized electrical equipment be visually inspected for possible defects before and after each use if found to be defective tagged accordingly

21 Insulated barriers, covers and mats Insulating mats: mats rated at voltages less than 650 V must comply with and be tested according to requirements of AS/NZS 2978 Insulating covers: covers rated at voltages less than 650 V must comply with and be tested according to the requirements of AS 4202 Both insulating covers and mats must be visually inspected for possible defects before and after each use. If found to be defective, items shall be tagged accordingly.

22 Safety Observers Work shall not commence if the risk assessment procedure or legislative requirements determine that work shall not be undertaken without the presence of a safety observer. A safety observer must: be competent to implement control measures in an emergency have the ability to rescue the worker who is carrying out the work, and have been assessed in the previous 12 months as competent to rescue and resuscitate a person

23 Training, Qualifications and Competence All electrical workers are to be competent, familiar with the equipment and be aware of all risks involved in the tasks. Specific training and authorisation might be required or necessary before commencing with the work. Regulatory authorities have requirements for licensing and supervision of workers. A supervisor shall: consider the type of work being undertaken have regard to the level of competence of the person being supervised; and be aware of additional requirements of regulatory authorities for the supervision of apprentices or trainees

24 You Called.. Plumber Gas Fitter Electrician Perform dangerous work that leads to disastrous outcomes

25 Thank you Source: Key Work Health and Safety Statistics 2014 Safework Australia AS4836 Safe Work on Low Voltage Electrical Installations Electrical Regulatory Authorities Council