Work Order and Safety Procedures

Work Order Creation and System Navigation

  • The user creates a work order in Maximo, ensuring all details are correct.
  • The system used might involve CWEI or CWE, but processing can take up to two hours.
  • After creating the work order, the user navigates to iRamp to proceed.

Clearance Process

  • Initial clearance status shows "NNN," indicating no clearance is established.
  • The user initiates clearance by creating an ad hoc clearance.
  • The user inputs their initials (TLU - Torben Leif Olsen) to identify the clearance request.
  • The hazard is identified as electrical.

Isolation Device

  • The pump breaker in the AC cabinet is selected as the isolation device.

Inverter Safety and Grounding

  • A complex explanation regarding inverters and grounding is provided.
  • The AC cabinet has a high calorie rating (100 cal), requiring special considerations.
  • Shutting down the transformer necessitates grounding if it's used as an isolation device.
  • A form from the electrical safety team dictates when grounding is necessary.
  • If the transformer is only shut down to access the AC cabinet and the breaker is the isolation point, grounding may not be required.
  • Grounding is mandatory if working on main reactors or AC breakers.

Maintenance Mode vs. Manual Mode

  • Maintenance mode radically lowers voltage limits and increases trip speed in the substation to lower arc flash potential.
  • Maintenance mode is controlled from the substation.
  • Manual mode is different and comes from SCADA, signaling that someone is working on the equipment and should not be touched remotely.
  • A widespread misconception exists regarding maintenance mode.
  • Maintenance mode stickers have been removed in some locations due to the confusion and elimination of maintenance modes in certain substations.
  • It's crucial to differentiate between maintenance mode and manual mode.
  • Manual mode informs the ROCC (Remote Operations Control Center) not to interfere with the equipment.

Practical Steps Despite Manual Mode

  • Even in manual mode, workers still need to physically turn off and lock out equipment to prevent remote overrides.

Additional Isolation Steps

  • DC breakers are also isolated to access cabinets for leak verification, specifically the phase module cabinet.