Means of maintenance of electrical installations
The electrical maintenance of bristol equipment improves reliability, increases service life and reduces the time allocated for repair. There are three types of interviews: "reactive maintenance, preventive maintenance or predictive maintenance".
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The difference between the three means is mainly in terms of the time allocated to maintenance staff and the diagnostic equipment provided to detect an anomaly.
- Reactive maintenance is not doing maintenance until it breaks. This method is economical in the very short term, but as soon as the equipment takes a little age, the reliability becomes irregular, it requires a large inventory management, the efficiency is reduced and the useful life is also reduced. This method is generally used for equipment operating occasionally where the interruption has no impact on production.
- Preventative maintenance promotes equipment maintenance by following manufacturer's directions to increase reliability, reduce costly breakage, reduce unplanned outages, increase efficiency, and extend service life. 'equipment. This method of maintenance requires a lot of time for maintenance staff, there are several tasks considered unnecessary since there are no diagnostic tasks with measuring devices detecting the present fault. This method is used for production with programmed shutdown.
- Predictive maintenance favors an approach by analyzing signs of defect (excessive vibration, abnormal temperature, degradation of lubrication) before performing maintenance. This method reduces maintenance time, eliminates unnecessary tasks, increases reliability, reduces costly breaks, reduces unplanned downtime, reduces inventory, optimizes equipment operation, increases efficiency and extend the life of the equipment. However, this method requires the acquisition of expensive diagnostic equipment, the training of personnel with measuring devices and this method is not profitable in the short term. This method is used for continuous production without the possibility of interruption.
In the previous three paragraphs, the three types of interviews were explained. It may be necessary to combine several methods to adapt the maintenance to the equipment or the values of the company. There are therefore the conditional interviews. Of these, two methods will be explained, maintenance based on reliability or risk.
- Reliability-based maintenance assesses the likelihood of a failure and aims to improve reliability while maximizing profitability. It uses predictive maintenance, but it allows for reactive maintenance for inexpensive maintenance that does not have a significant impact on reliability. It is mainly used for companies that do not have high financial resources and limited staff. They still want to improve reliability by lowering costs, but by targeting critical components to maintain. This method makes it possible to strike a balance between reliability and profitability. However, the initial cost is high.
- Risk-based maintenance classifies the probability of a failure occurring in order of priority. This method uses reactive, preventive and predictive interviews. It therefore makes it possible to optimize resources in a cost-effective manner, eliminate unnecessary maintenance, prioritize maintenance by importance, and verify the risks associated with the use of the equipment until its end of life. However, this method requires special expertise for the quantification of risk depending on the severity, probability and consequence.
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