Tag: isolation procedures

  • Lockout Tagout in Australian Plants: Isolation Procedures That Protect People

    Lockout Tagout in Australian Plants: Isolation Procedures That Protect People

    The Machine That Started While Someone Was Inside It

    Many of the worst injuries in manufacturing follow the same script. A machine stops or jams. Someone reaches in, climbs in or opens it up to clear, clean or repair it. The machine starts, because someone else pressed a button, a sensor cleared, a program resumed or stored energy released. The injury is done in less than a second.

    Lockout tagout is the procedure that prevents this. This guide explains what it is, the steps involved, what the rules in Queensland expect and where isolation procedures most often break down.

    What Lockout Tagout Means

    Lockout tagout, often written LOTO, is an American term that has become common in Australian plants. Australian guidance more often speaks of isolation, or isolation and lockout. The idea is the same. Before anyone works on plant, every source of energy is disconnected and physically locked in the off position by the person doing the work, and a tag is attached to say who has isolated it and why.

    Isolation is the act of disconnecting plant from its energy sources. Lockout is fitting a device, usually a padlock, that prevents the isolation being reversed. Tagout is attaching a danger tag that identifies the person and warns others not to operate the isolator.

    What the Law Expects in Queensland

    Queensland’s Work Health and Safety Regulation 2011 requires that maintenance, inspection and testing of plant be carried out by a competent person, and it sets requirements for operational controls. The Managing the risks of plant in the workplace Code of Practice 2021 states that plant should usually be isolated before maintenance or cleaning starts, and that plant should be isolated from power sources and unable to be switched on or activated accidentally before alterations begin.

    The code also deals with stored energy, calling for it to be released, for moving parts that would lower under gravity to be lowered and for supports to be provided. And it is clear about the limits of emergency stops: emergency stop devices should not be the only method of controlling risks.

    The technical standard behind this is part of the AS/NZS 4024 Safety of Machinery series, which includes AS 4024.1603 on the prevention of unexpected start-up.

    Energy Is More Than Electricity

    The most common isolation error is to switch off the electrical supply and assume the machine is safe. Production equipment holds energy in many forms, and every one needs its own isolation.

    Electrical. Mains supply, control supplies fed from elsewhere, and stored charge in capacitors, drives and batteries.

    Pneumatic. Compressed air held in cylinders, reservoirs and lines after the supply is shut.

    Hydraulic. Pressure in accumulators, rams and hoses.

    Mechanical. Springs under tension or compression, flywheels and parts that are still moving.

    Gravity. Raised platens, lift tables, counterweights and anything that will fall when its support is removed.

    Thermal. Steam, hot water, hot surfaces and refrigerants.

    Process. Product, CIP chemicals, gas and anything else that can flow into the work area through a pipe.

    A beverage filler may have all seven. An isolation procedure for it has to name each one and the point where it is isolated.

    The Steps of an Isolation

    Good procedures follow the same sequence.

    Prepare. Identify the plant, every energy source and every isolation point. Tell the people affected, including the person in control of the area.

    Shut down. Stop the plant using its normal controls.

    Isolate. Operate each isolation point: the isolator switch, the air and hydraulic shut off valves, the process valves.

    Lock and tag. Each person working on the plant fits a personal lock and danger tag to each isolation point.

    Release stored energy. Vent air, bleed hydraulic pressure, discharge capacitors, lower or block raised parts, allow hot parts to cool, drain lines.

    Verify. Prove the isolation has worked. Try to start the plant from its controls. Test for voltage with a proven instrument. Check gauges read zero. This is the step most often skipped and the one that catches the mistakes.

    Do the work.

    Restore. Replace guards, clear tools and people, remove locks and tags, and warn others before restarting.

    One Person, One Lock, One Key

    The strength of the system lies in a simple rule. Each person puts on their own lock, keeps their own key and removes their own lock. Nobody is protected by somebody else’s lock.

    Where several people work on the same plant, each applies a personal lock, using a multi lock hasp so that the isolator cannot be closed until the last lock is removed. For large jobs with many isolation points, a lock box is used. The isolation points are locked by one set of locks, the keys go in the box and each worker locks the box.

    Queensland’s electrical safety guidance makes the same points for electrical isolation: individuals should ensure their own personal lock is applied to the isolation point, and a lock box may be needed where multiple devices cannot be fitted.

    Danger Tags and Out of Service Tags

    These do different jobs and should never be confused. A danger tag is personal. It means a person is working on this plant and their safety depends on the isolator staying where it is. An out of service tag is about the equipment. It means the item is defective or unsafe to use, and it protects the plant and the next user.

    A tag by itself is a warning, not a barrier. Tags can fall off, fade or be ignored. Wherever an isolator can be locked, it should be.

    What Is Not Isolation

    Emergency stop buttons, guard interlocks, a stop command on the HMI and a program held in the PLC are all control functions. They can fail, be reset by someone else or be overridden by a fault. Queensland’s electrical isolation guidance puts it plainly: control circuits or electronic switching devices shall not be used as a method of isolation.

    The practical difficulty is the quick job. Clearing a jam takes thirty seconds and a full isolation takes five minutes, so people rely on the interlock or the stop button. That is when people get hurt. The answer is partly discipline and partly design: remove the cause of the jam, provide local isolators within reach, and where frequent access is unavoidable, engineer a properly designed safety function for that task instead of leaving people to improvise.

    Removing Someone Else’s Lock

    Sooner or later a lock is left on and its owner has gone home. Every site needs a written procedure for this before it happens. It should require a real attempt to contact the person, confirmation that they are not on site, an inspection of the plant by an authorised person, a documented decision by a manager and notification to the lock owner before their next shift. Cutting a lock off because production is waiting is how the system dies.

    Contractors and Isolation

    Contractors working on your plant must be covered by an isolation. Agree before the job whose procedure applies, who identifies the isolation points and who applies locks. In most plants the site isolates and the contractor adds personal locks. Contractors do not know your equipment. A second supply to a control panel or an air line fed from another machine is exactly the thing an outsider will miss.

    Where Isolation Procedures Fail

    Isolation points that are not labelled, so the wrong one is switched. No written procedure for the specific machine. Stored energy not released. No verification. One lock for a whole crew. Locks with shared or master keys. Isolators that are hard to reach, so people do not bother. Modifications that added an energy source the procedure does not mention. Each of these is cheap to fix and expensive to leave.

    Where BevTech Fits

    BevTech is a family owned engineering business in Richlands, Brisbane, with more than 25 years in beverage and FMCG manufacturing. Our electricians and mechanical trades work under isolation on client plants every day, and we help sites make isolation easier to do properly: installing lockable local isolators and air dump valves where they are needed, labelling isolation points to match the drawings, updating drawings after modifications, and designing safety functions through our TUV certified functional safety engineers for tasks where frequent access is unavoidable.

    If isolating a machine on your site is harder than it should be, use the contact form at bevtech.com.au/contact.

    This article is a general guide current as at October 2026 and is not a substitute for site procedures or training. Confirm the requirements for your workplace with Workplace Health and Safety Queensland.

  • What a Shift Cover Industrial Electrician Should Be Able to Do: A Competency Checklist for Brisbane Plants

    What a Shift Cover Industrial Electrician Should Be Able to Do: A Competency Checklist for Brisbane Plants

    Why a Checklist Beats a Conversation

    Most shift cover arrangements are agreed on the strength of a phone call and a CV. The provider says the electrician is experienced in industrial environments, the plant manager takes it on trust, and both sides find out what that means during the first night shift. Sometimes it works. When it does not, the plant discovers at 2am that experienced meant something quite different from what it assumed.

    A written competency checklist removes the ambiguity. It gives your provider a precise target to match against, gives you a defensible basis for accepting or rejecting a placement, and gives the electrician a clear picture of what the shift expects. Here is a checklist Brisbane FMCG and beverage plants can adapt, organised from the non negotiable baseline upward.

    Tier One: Licences, Tickets and Currency

    Start with the items that are simply pass or fail, and verify rather than accept. A current Queensland electrical work licence of the appropriate class, checked against the register rather than a photograph of a card. Low voltage rescue and CPR training in currency, which matters disproportionately for someone who may be the only electrically competent person in the building overnight. A construction induction card where your site requires it, and any high risk work licences relevant to the tasks in scope, typically elevating work platform, working at heights and confined space entry depending on your plant.

    Alongside the individual’s credentials, verify the provider’s Queensland labour hire licence. The scheme is mandatory, the register is public, and the obligation extends to you as the host. Verification is a five minute task that you only regret skipping once.

    Tier Two: Control Systems Capability, Stated Honestly

    This is where most vetting fails, because it asks a yes or no question about something that exists on a spectrum. Rather than asking whether the electrician knows PLCs, define the level you need using three tiers and ask which one applies.

    At the monitoring level, the electrician can connect to the system, read alarms and status, interpret fault codes and describe what the machine is waiting for. At the diagnostic level, they can go online with the program, follow the logic, trace an interlock chain back to the input that is failing, and identify the physical cause. At the modification level, they can safely make and document changes to the program or configuration.

    For most shift cover, diagnostic capability is the target, on the platforms your plant actually runs, which in Australian beverage and food production usually means Allen Bradley or Siemens. Modification rights are often deliberately withheld from covering electricians for change control reasons, which is a sound policy provided your escalation path can reach someone who does have them.

    Extend the same tiering to variable speed drives and servo systems: reading faults and parameters is one competency, restoring a drive to service correctly is another, and knowing when a drive fault is actually a mechanical symptom is the judgement that separates good from adequate.

    Tier Three: Isolation, Switching and Safety Systems

    Ask specifically about isolation practice, because it is the area where an unfamiliar electrician is most likely to cause harm. Can they work confidently within your isolation and permit system, including group isolations and stored energy? Are they comfortable with switchboard work at the levels your site requires, and clear about where your rules say stop?

    Safety systems deserve their own question. Guard interlocks, light curtains, emergency stop circuits and safety rated devices fail safe, which means a large share of stoppages present as safety trips under time pressure. The competency you need is the ability to diagnose the trip properly and restore the function correctly, together with the discipline to refuse the shortcut when production is pushing. Asking an electrician how they would handle pressure to bypass a guard interlock at the end of a long night is one of the most informative questions in the whole checklist, and the right answer is unmistakable.

    Tier Four: Instrumentation and Process Awareness

    Production faults frequently resolve to instrumentation rather than to the controller. Level probes, flow meters, temperature sensors, pressure transmitters, photo eyes and proximity switches all feed the logic making decisions, and a covering electrician who can verify a signal, check a calibration and judge whether a reading can be trusted will close out faults that others escalate.

    Process awareness sits alongside it. In food and beverage plants, the electrician needs to understand why a clean in place cycle cannot simply be interrupted, what hygiene zoning means for their tools and materials, and how to leave equipment so the line can restart in a compliant state. This knowledge is invisible on a CV and obvious within one shift.

    Tier Five: Independence and Judgement

    The final tier is the hardest to test and the most important. A covering electrician on a night shift makes decisions alone under time pressure. You need someone who will work methodically rather than by guesswork, who documents what they found so day shift can close the loop properly, who knows the boundary of their own competence, and who escalates without ego when a problem crosses it.

    The practical test is a structured conversation about a real fault from your own history. Describe the symptoms as the operator reported them and ask how they would approach it. You are not marking the answer for correctness. You are listening for method: do they gather information before acting, do they reason from the control system outward, do they mention safety and isolation unprompted, and do they say clearly at what point they would call for help?

    How to Use the Checklist

    Send it to your provider before they propose anyone, and ask them to respond against each tier for the specific individual rather than in general terms. A provider with real technical depth will engage with this happily and will sometimes tell you a candidate meets four tiers but not the fifth, which is exactly the honesty you want. A provider who responds with reassurance instead of specifics has answered a different question.

    This is where the nature of the provider matters. An engineering business that programs control systems, builds panels and repairs production equipment every week can assess these tiers from direct knowledge. BevTech operates from that position: family owned, more than 25 years in manufacturing, specialising in FMCG and beverage production, with control system engineers, industrial electricians and TUV certified functional safety engineers on staff, and project experience spanning refrigeration PLC controls for beer tank temperature management, hot water rinse CIP systems for can seamers and can inverter block systems.

    To discuss shift cover for your Brisbane site, or to put a proposed placement through the checklist above, contact BevTech via the form at bevtech.com.au.

@Fd2X@HoSi10178
Shutdown Checklist
Bevtech fmcg beverage shutdown planning checklist glass.webp0000

Get Your FMCG & Beverage Plant Shutdown Planning Checklist

We wont spam you :) or share your details.
We will send you an email with the PDF checklist.