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What are the most effective ways to maintain distribution system protection equipment?

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Distribution system protection equipment is essential for ensuring the reliability, safety, and efficiency of the power grid. It includes devices such as circuit breakers, fuses, relays, reclosers, and sectionalizers that can isolate faults, prevent damage, and restore service. However, these devices also require regular maintenance to perform optimally and avoid failures. In this article, you will learn some of the most effective ways to maintain distribution system protection equipment, based on industry standards and best practices.

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Arturo Nú?ez

Director | Senior Leader | Innovation | Research and Development | Strategic Development | Digital Transformation |

1 Plan and schedule maintenance activities

One of the first steps to maintain distribution system protection equipment is to plan and schedule the maintenance activities according to the equipment type, condition, and criticality. You should follow the manufacturer's recommendations, as well as the guidelines from the Institute of Electrical and Electronics Engineers (IEEE) and the North American Electric Reliability Corporation (NERC). You should also consider the environmental factors, such as temperature, humidity, dust, and corrosion, that may affect the equipment performance and lifespan. By planning and scheduling the maintenance activities, you can optimize the resources, reduce the downtime, and prevent unexpected failures.

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Arturo Nú?ez

Director | Senior Leader | Innovation | Research and Development | Strategic Development | Digital Transformation |
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Maintenance should ideally be condition based maintenance (CBM) rather than time based maintenance. This will be more effective in identifying the assets that need the maintenance work to be done more urgently than others. However, in order to achieve CBM it is necessary to create a robust program using sensors, monitoring system or non-invasive testing to generate accurate information.

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2 Perform visual and functional inspections

Another effective way to maintain distribution system protection equipment is to perform visual and functional inspections on a regular basis. Visual inspections can help you identify any signs of physical damage, wear, or deterioration, such as cracks, leaks, rust, or loose connections. Functional inspections can help you verify the operation and coordination of the protection devices, such as the trip and close mechanisms, the current and voltage settings, and the communication and control functions. You should use appropriate tools and methods, such as multimeters, test switches, and simulation software, to perform the functional inspections safely and accurately.

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3 Conduct preventive and corrective maintenance

The next step to maintain distribution system protection equipment is to conduct preventive and corrective maintenance as needed. Preventive maintenance involves performing routine tasks, such as cleaning, lubricating, adjusting, and replacing parts, to prevent or delay the equipment degradation. Corrective maintenance involves repairing or replacing faulty or damaged components, to restore the equipment functionality and performance. You should follow the standard operating procedures, safety protocols, and quality standards when conducting preventive and corrective maintenance. You should also document and record the maintenance actions and results for future reference and analysis.

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4 Monitor and analyze equipment performance

The final step to maintain distribution system protection equipment is to monitor and analyze the equipment performance over time. You can use various techniques and technologies, such as sensors, meters, smart devices, and data analytics, to collect and process information about the equipment condition, operation, and behavior. By monitoring and analyzing the equipment performance, you can identify any trends, patterns, or anomalies that may indicate potential problems or opportunities for improvement. You can also use the data to evaluate the effectiveness of the maintenance activities and adjust the maintenance plan accordingly.

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5 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What are the most effective ways to maintain distribution system protection equipment?

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3

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5

1 Plan and schedule maintenance activities

2 Perform visual and functional inspections

3 Conduct preventive and corrective maintenance

4 Monitor and analyze equipment performance

5 Here’s what else to consider

Power Engineering

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What are the most effective ways to maintain distribution system protection equipment?

1

2

3

4

5

1 Plan and schedule maintenance activities

2 Perform visual and functional inspections

3 Conduct preventive and corrective maintenance

4 Monitor and analyze equipment performance

5 Here’s what else to consider

Power Engineering

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