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Course Background

Transmission and Distribution - Lockout/Tagout: Out of Service

Duration: thirteen minutesLanguages: English

This course explains how to safely take transmission and distribution equipment out of service by isolating hazardous energy and following proper Lockout/Tagout procedures.

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Course Description

This course focuses on the steps required to place equipment safely out of service before maintenance or servicing begins in transmission and distribution operations. It covers the planning and preparation activities that occur before work starts, including pre-work meetings, energy source identification, and review of equipment documentation. The module explains how complex, interconnected systems are isolated using valves, isolation switches, circuit breakers, disconnects, and fuses, and why verification of zero energy is critical before work begins. It also addresses final safety checks, ongoing monitoring during work, and the controlled process for removing Lockout/Tagout devices and restoring equipment to service.

Learning Objectives:

  1. Identify the steps required to safely take transmission and distribution equipment out of service before maintenance.
  2. Recognize methods for isolating complex systems and verifying that all hazardous energy has been controlled.
  3. Describe the proper process for removing Lockout/Tagout devices and the additional risks associated with hot tap procedures.
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