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Maintenance carried out to prevent major breakdown or failure is called?
Breakdown
Preventive
Routine
None of the above
Preventive
Preventive maintenance is a proactive strategy involving scheduled inspections, adjustments, and replacements performed to prevent equipment failures before they occur. By identifying potential issues such as wear, overheating, or insulation degradation, it significantly enhances the reliability and operational lifespan of electrical power systems.
Preventive maintenance is a proactive strategy involving scheduled inspections, adjustments, and replacements performed to prevent equipment failures before they occur. By identifying potential issues such as wear, overheating, or insulation degradation, it significantly enhances the reliability and operational lifespan of electrical power systems.
MTBF=╬╗1тАЛ тАФ Mean Time Between Failures where ╬╗ is the failure rate
P(t)=eтИТ╬╗t тАФ Reliability function showing probability of no failure over time t
The principle relies on the 'bathtub curve' of equipment reliability, where scheduled interventions are performed during the useful life phase to mitigate wear-out or random failure risks. It utilizes condition-based monitoring or time-based intervals to replace components (like capacitors, insulators, or contacts) before they reach their critical failure threshold, thus ensuring system availability.
Reduces the frequency and cost of emergency 'breakdown' repairs.
Essential for high-voltage assets like transformers and circuit breakers.
Often involves periodic cleaning, lubrication, and insulation resistance (IR) testing.
Shifts focus from reactive maintenance to proactive reliability-centered maintenance (RCM).
Extended equipment service life
Increased plant safety and availability
Reduced unplanned downtime
High initial investment in planning
Risk of over-maintenance (replacing parts too early)
Requires skilled labor and consistent scheduling
Electrical distribution switchgear
Rotating machinery (motors and generators)
Transformer oil testing and analysis
Breakdown maintenance is 'Run-to-failure' (Reactive), which is expensive and unpredictable.
Preventive maintenance is 'Time-based' or 'Condition-based', aiming to avoid the failure event entirely.
B is correct тАФ Preventive maintenance is specifically designed to preempt failures through regular inspection and servicing.
In competitive exams, remember that Preventive Maintenance acts before the fault, while Predictive Maintenance uses data sensors to identify when the fault is imminent.