Electrical Maintenance Strategies Overview

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Questions and Answers

What is one of the main challenges in using electrical equipment in a power system?

The installation process is complex

The maintenance cost is high

The load is variable (correct)

Equipment is often oversized

Which of the following is NOT listed as a benefit of a proper maintenance program?

Minimizes accidents

Extends mean time between failures

Enhances equipment aesthetics (correct)

Reduces unplanned shutdowns

What does electric preventive maintenance aim to uphold?

Operational functionality and efficiency (correct)

Overall system complexity

Installation time

Initial purchase value

Which of the following is considered a routine maintenance task?

Routine tests Signup and view all the answers

Why is it important to conduct proper maintenance on electrical equipment?

To mitigate hazards and failures Signup and view all the answers

What is one of the features of a maintenance department in industries?

Conduct effective maintenance strategies Signup and view all the answers

Which type of failure does a proper maintenance program help to extend the mean time between?

Functional failures Signup and view all the answers

What type of maintenance includes service of electrical apparatus?

Electric preventive maintenance Signup and view all the answers

What is a direct benefit of an effective maintenance program?

Reduced downtime of equipment Signup and view all the answers

Which of the following is an indirect benefit of regular maintenance?

Better workmanship Signup and view all the answers

In the 'Run-to-Failure' (RTF) approach, when are repairs typically conducted?

Only when equipment affects system performance Signup and view all the answers

What is a disadvantage of the 'inspect and service as necessary' approach?

It lacks formal monitoring. Signup and view all the answers

What is a significant risk associated with the RTF maintenance strategy?

Lower power reliability Signup and view all the answers

Which principle is important for maintaining equipment and electrical devices?

Having clean surroundings Signup and view all the answers

Which approach is more progressive than the Run-to-Failure method?

Scheduled inspections Signup and view all the answers

Which factor can improve the overall effectiveness of a maintenance program?

Regular training of maintenance personnel Signup and view all the answers

What triggers reactive maintenance?

Functional failure Signup and view all the answers

Which of the following best describes the primary advantage of preventive maintenance?

It follows a scheduled routine. Signup and view all the answers

What is a major disadvantage of preventive maintenance?

It can lead to unnecessary maintenance. Signup and view all the answers

What technique is primarily utilized in predictive maintenance?

Condition monitoring Signup and view all the answers

Which maintenance approach aims to anticipate problems before they occur?

Proactive maintenance Signup and view all the answers

What is a common application of predictive maintenance?

Detecting electrical issues with infrared thermography Signup and view all the answers

Which of the following is an example of reactive maintenance?

Replacing a burned-out light bulb Signup and view all the answers

What is a characteristic of proactive maintenance?

Identifies and corrects the root cause of problems Signup and view all the answers

Which factor is NOT mentioned as affecting Electric Preventive Maintenance (EPM) decisions?

Environmental impact Signup and view all the answers

What is an indicator of a high-quality Electric Preventive Maintenance program?

Trend test results Signup and view all the answers

Who should conduct Electric Preventive Maintenance?

Trained EPM personnel under management supervision Signup and view all the answers

Which method should be implemented if the root cause of a failure cannot be identified?

Resume operation and continue monitoring Signup and view all the answers

What is the purpose of post-maintenance testing?

To ensure reliability and continuity of operations Signup and view all the answers

Which of the following is a step to take when facing endemic problems with equipment?

Inform the manufacturer right away Signup and view all the answers

What does EPM personnel need to have knowledge of?

Fundamentals of electrical power technology and equipment operation Signup and view all the answers

Which of these factors is related to the financial aspects of equipment management in EPM?

Costs Signup and view all the answers

What is the primary focus of the next module following the completion of Module 1?

Planning and Overview of EPM Procedures Signup and view all the answers

What should students do before completing Module 1 according to the seatwork instructions?

Create a step-by-step procedure for operation failures Signup and view all the answers

What legal framework governs the reproduction and communication of the course materials?

Intellectual Property Code of the Philippines Signup and view all the answers

According to the course pack, what can happen if students reproduce or communicate the materials without authorization?

They may be subject to copyright infringement Signup and view all the answers

What sentiment is expressed towards the end of Module 1?

A sense of accomplishment and looking forward to Module 2 Signup and view all the answers

Study Notes

Overview of Electrical Maintenance Strategies

Importance of Maintenance:
- All electrical equipment deteriorates over time
- Maintenance is crucial for maintaining integrity, functionality, and efficiency
- Variable load in power systems can affect performance, necessitating maintenance
Maintenance Benefits:
- Direct:
  - Reduced repair costs
  - Reduced downtime
  - Improved safety
- Indirect:
  - Improved employee morale
  - Better work quality
  - Increased productivity
  - Early detection of system deficiencies

Guiding Principles for Effective Maintenance

Environment: Dry, cool, clean, airtight surroundings

Maintenance Approaches

Reactive Maintenance

Run-to-Failure (RTF):
- Least proactive maintenance approach
- Equipment only repaired or replaced when performance is affected
- Less expensive initially but can be costly in the long run
- Higher risk of failure and lower reliability
Inspect and Service As Necessary:
- More proactive than RTF
- Regular equipment inspections
- Mitigates problems before becoming catastrophic
Examples: Replacing failed fuses, incandescent lamps, and repair equipment

Preventive Maintenance (PM)

Time-Based Maintenance (TBM):
- Scheduled maintenance at regular intervals or operational cycles
- Follows manufacturer recommendations or industry standards
- Does not optimize system performance
Examples: Overhauling a functioning motor generator set

Predictive Maintenance

Condition Based Maintenance (CBM):
- Similar to TBM but uses non-intrusive testing techniques
- Utilizes equipment performance history and maintenance data
- Not applicable to all equipment
Examples: Using infrared thermography to detect high-resistance electrical connections

Proactive Maintenance

Aims to anticipate failures and introduce solutions before they occur
Identifies root causes to prevent future problems
Employs a comprehensive approach to minimize breakdowns

Electric Preventive Maintenance (EPM)

Key Factors Affecting EPM Decisions:
- Safety impact
- Productivity and profitability impact of equipment failure
- Costs
- Life expectancy of equipment
- Failure predictability
- Likelihood of damage
- Technical support
- Resource availability
EPM Personnel:
- Should be experienced and trained
- Possess knowledge of electrical power technology, general maintenance techniques, and equipment design and operation
EPM Program Indicators:
- Ability to track test results such as insulation resistance, leakage current, capacitance, PF, and DF; bearing temperature and vibration; and winding temperature
Steps in the Event of Equipment Failure:
- Conduct a failure-cause analysis:
  - Compare present failures to past conditions
  - Involve the manufacturer, if the problem is endemic
  - Identify plant-specific deficiencies (design, operational stats, environmental factors)
  - Determine specific deficiencies
  - Perform post-monitoring and testing

Importance of Post-Maintenance Testing

It is the final procedure in EPM programs, especially in sophisticated plants and industries
Ensures reliability and continuity of operations

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Description

This quiz explores the essential strategies for electrical maintenance, emphasizing the importance of upkeep for functionality and efficiency. It covers the benefits, guiding principles, and various approaches to maintenance, including reactive maintenance. Test your knowledge on how effective maintenance can enhance safety and productivity.