In a production facility, an electrical fault is more than a stopped machine. Work schedules may change, staff may have to wait and delivery plans may be affected. The purpose of maintenance is therefore not only to restore power when a fault occurs, but also to understand the cause and set up a follow-up routine that reduces the chance of it happening again.
Whatever the size of the facility, the first step is to know the electrical infrastructure. Which panel feeds which area? Which machines are critical? Where did previous faults occur? A maintenance list prepared without bringing this information together may miss the facility’s real priorities.
What information does a maintenance plan start with?
It is useful for the person responsible for the facility to collect the current single-line diagrams, the equipment list, previous inspection reports and fault records in one file. The information in these documents should be compared with the situation on site. If a machine added later or a changed supply circuit does not appear in the records, later assessments may be made with incomplete information.
For example, imagine the same production line has stopped several times in the last three months. Instead of recording only the name of the failed part, writing down the time of the event, the machines in operation, the error observed and the action taken together makes it possible to link events. This is an example of a recording approach; on its own it does not determine the cause of the fault.
What does thermal inspection provide?
A thermal camera helps examine the temperature distribution in electrical equipment. Differences between connections operating under similar load and changes over time can indicate points that need closer inspection. However, interpreting the image depends on the load condition, surface properties and measurement conditions. A definite fault diagnosis is not made from a single temperature value. Fluke — Thermal imaging in preventive maintenance (opens in a new tab)
A connection that appears hotter than expected should be investigated together with current and connection conditions. Comparing phase loads and taking suitable electrical measurements helps to make sense of a thermal finding. Access to and measurement of energised equipment is a job for competent personnel working under appropriate conditions. Fluke — Thermal inspection of electrical systems (opens in a new tab)
How do fault repair and planned maintenance work together?
In a fault response, the priority is to reach a safe state and identify the problem. Planned maintenance, on the other hand, allows work to be prepared around the production schedule. The materials to be replaced, the required outage, the people responsible and how completion will be verified can all be decided in advance.
Rather than using the same maintenance interval for every facility, the manufacturer’s instructions, utilisation, ambient conditions and past findings should be considered together. A panel operating in a dusty environment and one in a clean, controlled room do not face the same conditions. The maintenance schedule is also considered together with the inspection obligations applicable to the facility; this article does not define a fixed legal interval.
What should a maintenance report contain?
A usable record for the facility should answer these questions:
- Which equipment was inspected, and under which conditions were measurements taken?
- Which findings were identified, and which work was completed?
- What work remains open, and what are its priorities?
- On what basis will the next inspection or intervention be planned?
Keeping photos, measurement results and notes under the same equipment ID makes comparison easier at later visits. Completion of maintenance should not be judged only by a part being replaced; the results of the relevant checks should also be recorded.
When the facility grows, the maintenance plan changes too
A new machine, shift or production area can change how the existing electrical infrastructure is used. When such a change happens, the maintenance list, panel descriptions and technical documents should be reviewed again. A file prepared for the conditions on the day the facility was first built should not be assumed to remain accurate years later.
At Özermudo Mühendislik, we handle the fault and maintenance needs of our existing clients’ facilities together with measurement and inspection findings. To discuss your facility’s current condition and the work it needs, get in touch with us.