Tag: electrical maintenance

  • Electrical Maintenance for Manufacturing Plants: Building a Planned Programme

    Electrical Maintenance for Manufacturing Plants: Building a Planned Programme

    Electrical Failures Give Warning, if Anyone Is Looking

    Mechanical wear announces itself. Bearings get noisy, chains slacken, belts fray. Electrical deterioration is quieter. A termination loosens a little more each time the cable heats and cools. A drive’s cooling fan slows. Dust builds on a contactor. Nothing looks wrong until the afternoon a switchboard trips and takes half the plant with it.

    Most of these failures are detectable weeks or months in advance with simple tests. A planned electrical maintenance programme is how a plant finds them on its own timetable. This guide sets out what the regulations require in a Queensland manufacturing plant, what good practice adds, and how to build a programme that fits around production.

    The Legal Minimum in a Queensland Manufacturing Plant

    Queensland’s electrical safety regulation sets inspection and testing requirements according to the type of work carried out at a workplace, and manufacturing work has its own rules. They apply to what the regulation calls specified electrical equipment, which is equipment with a current rating of not more than 20 amps and includes extension leads and portable outlet devices.

    Double insulated equipment must be inspected, tested and tagged at intervals of no more than 12 months.

    Equipment that is not double insulated must be inspected, tested and tagged at intervals of no more than 6 months.

    Fixed safety switches need a push button test at least every 6 months and an operating time and current test at least every 12 months.

    Portable safety switches are not permitted in manufacturing work at all.

    Testing and tagging must be done by a person appointed as competent by their employer, and the relevant standard is AS/NZS 3760. These are minimum intervals. Equipment in harsh areas, such as washdown zones, deserves more frequent attention.

    Why the Minimum Is Not a Maintenance Programme

    Notice what those rules cover: portable equipment, leads and safety switches. They are aimed at protecting people from electric shock, which is essential. They say almost nothing about the switchboards, motor control centres, drives and motors that keep a plant producing. A site can be fully up to date with testing and tagging and still be weeks away from a major electrical failure.

    A maintenance programme has to cover both: the safety obligations and the reliability of the fixed plant.

    Start With an Electrical Audit

    You cannot plan maintenance for equipment you have not listed. An electrical audit is a condition survey of the site that produces an asset list, a description of the condition of each item and a ranked list of what needs attention.

    A useful audit report separates findings into three groups: safety issues that need action now, reliability risks that should be scheduled, and observations to watch. It includes photographs. It also tells you where your documentation is missing, which is usually the first thing to fix.

    What a Good Programme Covers

    Thermal imaging. An infrared camera shows loose connections, overloaded circuits and failing components as hot spots, long before they fail. It is non-contact and is done with the plant running, because the equipment must be under load for a problem to show. For many plants an annual survey of every switchboard and motor control centre, timed a few months before the shutdown, gives the best return of any electrical maintenance task.

    Switchboards and motor control centres. With the power off: cleaning, checking terminations for tightness, inspecting contactors and breakers for wear and heat damage, checking door seals and verifying that labels match the drawings.

    Motors. Insulation resistance testing to track winding condition over time, current measurement on each phase, and a look at terminal boxes for moisture. A falling insulation reading is a clear early warning.

    Variable speed drives. Cleaning or replacing filters, checking cooling fans, confirming enclosure temperatures and backing up parameters. Heat is what kills drives, and blocked filters are the usual cause.

    Control systems. PLC and HMI backups taken and verified, memory backup batteries replaced on schedule, control power supplies checked and panel cooling confirmed.

    Safety systems. Functional tests of emergency stops, guard interlocks and light curtains, with the results recorded.

    Standby and emergency systems. Uninterruptible power supplies and their batteries, emergency and exit lighting, and any standby generator.

    Field wiring. Cables that flex, glands in wet areas and junction boxes exposed to washdown. In food and beverage plants, water ingress is behind a large share of electrical faults.

    Setting the Frequencies

    Apart from the regulated intervals, there is no single correct frequency. Set it by criticality and environment. A drive on the main filler in a warm, wet area warrants monthly attention to its filters. A distribution board in a dry store may need a look once a year.

    A practical structure has four tiers. Short operator level checks done weekly, such as looking for damaged leads and blocked panel vents. Monthly or quarterly tasks done by an electrician during planned maintenance stops. Annual tasks such as thermal imaging and motor testing. And invasive work on switchboards, which needs the power off and belongs in the shutdown.

    Review the frequencies after a year. If a task never finds anything, do it less often. If it finds something every time, do it more often or fix the underlying cause.

    Working Around Production

    Electrical maintenance has a constraint that mechanical maintenance does not share. In Queensland, electrical work on or near energised equipment is generally prohibited, so most hands-on work inside a panel needs that panel isolated. That means maintenance has to be planned into stops: changeovers, weekly maintenance windows and the annual shutdown.

    The answer is to sort tasks by what they need. Thermal imaging and visual inspections can be done while running. Tasks on one machine fit into that machine’s planned stops. Switchboard work that affects a whole area is grouped for the shutdown, where the electrical scope should be agreed weeks ahead so that parts are on hand and isolations are planned.

    Records That Earn Their Keep

    A maintenance programme without records is a series of unconnected visits. Keep the test and tag register, safety switch test results, thermal images from each survey so that changes can be compared, motor insulation readings as a trend, backup dates and a log of every fault with its cause.

    These records satisfy auditors and insurers. More usefully, they show which assets are deteriorating and justify replacing them before they fail.

    Is It Worth the Cost

    The comparison is simple to make for your own plant. Take the cost of one hour of lost production on your main line and multiply it by the hours lost to electrical faults last year. Then compare that with the cost of a thermal survey, a few planned maintenance days and a shutdown scope. In most plants the programme pays for itself by preventing a single serious failure.

    Electrical Maintenance From BevTech

    BevTech is a family owned engineering business in Richlands, Brisbane, with more than 25 years in beverage and FMCG manufacturing. Our industrial electricians provide preventative maintenance and repairs aligned with production schedules, condition audits of equipment and sites that find problems before they cause downtime, and planning and crews for annual shutdowns. We work on Allen Bradley and Siemens systems across Brisbane and South East Queensland, with 24/7 breakdown support for the faults that still get through.

    If you would like an electrical audit as the starting point for a maintenance programme, use the contact form at bevtech.com.au/contact.

    The test intervals in this article are those published by the Electrical Safety Office for manufacturing work, current as at October 2026. Confirm the requirements that apply to your own workplace before relying on them.

  • Why 24/7 Electrical Shift Coverage Protects Your Bottom Line

    Most FMCG and beverage production lines do not run on a tidy nine to five schedule, and increasingly neither does the equipment that keeps them running. Multi shift and continuous production models are now standard across much of the Australian beverage manufacturing sector, yet electrical maintenance coverage at many sites still effectively stops when the day shift electrician clocks off. For operations and procurement leaders, that gap between production hours and maintenance coverage hours represents one of the more avoidable sources of lost output on the plant floor.

    The hidden cost of the coverage gap

    When an electrical fault occurs outside business hours on a site without dedicated after hours coverage, the typical response is an emergency callout to a third party contractor, who may not be familiar with the plant’s specific control architecture, wiring history, or past fault patterns. The result is usually a longer time to diagnose the issue, a premium rate for the emergency visit, and in many cases a temporary fix rather than a permanent repair, since an unfamiliar technician working under time pressure on an unfamiliar system is naturally inclined toward the fastest safe resolution rather than the most durable one.

    Multiply this across a year of night and weekend production, and the cumulative cost, in lost output, premium callout rates, and repeat visits for issues that were only partially resolved the first time, frequently exceeds what a retained shift coverage arrangement would have cost outright.

    Where the risk concentrates

    Certain systems are particularly exposed to after hours failure risk on beverage and food production sites. Refrigeration and glycol cooling systems, which often run continuously regardless of production shift patterns, are a clear example, since a control fault affecting temperature regulated tanks can put product quality at risk within hours if not addressed promptly. CIP, clean in place, systems running scheduled cleaning cycles overnight are another, since a fault partway through a cleaning cycle can delay the next production run if not resolved before the morning shift starts. Packaging and filling line electrical faults during night shift production are the most direct hit to output, since every minute of downtime on a running line is lost throughput that cannot easily be recovered later in the production schedule.

    What 24/7 coverage actually looks like

    Effective round the clock electrical support is more than simply having a phone number to call. The value comes from familiarity, technicians who already understand the plant’s specific control systems, wiring history, and common fault patterns will diagnose and resolve issues faster than a generalist contractor encountering the site for the first time. This is why retained shift coverage arrangements with a consistent engineering partner tend to outperform ad hoc emergency callout relationships, even when the hourly rate looks similar on paper.

    A well structured coverage arrangement typically includes electricians available across rostered shifts aligned to the plant’s own production schedule, proactive electrical audits during quieter periods to catch developing faults before they cause a stoppage, and a documented fault history that builds institutional knowledge of the site over time rather than starting from zero with every callout.

    Building the business case

    For procurement teams evaluating whether to invest in retained 24/7 electrical coverage, the comparison should be built around three figures, the historical cost of after hours emergency callouts including premium rates and repeat visits, the value of production lost during after hours electrical faults over the past twelve to twenty four months, and the cost of a retained coverage arrangement scaled to the plant’s actual shift pattern. In facilities running genuine round the clock or extended multi shift production, retained coverage almost always wins this comparison once lost production value is properly accounted for, since even a few hours of unplanned downtime on a high volume filling line can outweigh a full year of coverage cost.

    Annual shutdown support as a related consideration

    The same logic extends to planned annual shutdown periods, where compressed timeframes mean any electrical issue uncovered during a shutdown needs immediate resolution to avoid delaying the restart of production. An engineering partner who already provides ongoing shift coverage is naturally better positioned to support shutdown work too, since they arrive already familiar with the site rather than needing to be briefed from scratch under time pressure.

    A partner built for continuous production environments

    Bevtech Engineering and Automation provides 24/7 electrical shift coverage for food and beverage manufacturers across South East Queensland, supporting installations, maintenance day repairs, preventative maintenance, proactive electrical audits, general site maintenance, and annual shutdown support. The team’s specialisation in FMCG environments, built over more than 25 years, means technicians arrive with genuine familiarity with the equipment, control platforms, and production pressures specific to beverage and food manufacturing. To discuss a coverage arrangement suited to your shift pattern, contact Bevtech on +61 400 881 321 or admin@bevtech.com.au, or visit the team at 25 Silvio St, Richlands QLD.

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