More Local

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juliave
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270105
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More Local
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2014-05-20 15:15:55
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  1. Define Unqualified
    Does not meet the requirements for the "qualified" categories
  2. Define Qualified- Specially trained
    non-electrical workers that have passed an approved LOA course

    Certified Utility Arborist
  3. Define GOI
    Guarantee of Isolation

    A stated and duly logged guarantee between two operating authorities that a specific equipment/conductor is isolated and will remain isolated until the GOI is returned.
  4. Differentiate between level I-IV and level V equipment
    • level I-IV
    • has more than one hazardous source of infeed and shows up on a one-line diagram

    • level V
    • one source of hazardous infeed and doesn't show up on a one-line diagram
    • ex. secondary of a VT
  5. What is the process for isolating equipment?
    • submit field request
    • develop plan
    • create switching order
    • field performs switching
    • tag MIMIC display
  6. What type of drawings can be used for operating (switching, etc) the power system?
    • Operating one-line diagrams
    • DOD (Distribution operating diagrams)
    • UDD
    • feeder cable drawings
    • primary maps
    • electronic representation
    • circuit location diagrams
  7. What are ANRP's and LLP's?
    Assurances from the PIC that the automatic reclose on the circuit has been set to OFF. This ensures that the line will not re-energize if it's tripped from its own protection.
  8. What is a Switching Order?
    When must a switching order be documented on a Switching Order forM?
    An order describing switching steps in proper sequence from the PIC using clear and precise instructions using unique identifiers.

    Form required when there is three or more switching steps.
  9. With the numbering structure
    #L-#X, identify the group associated with #, L
    • #
    • 1 - Policy Orders
    • 2 - Technical Orders
    • 3 - Station Orders
    • 4 - Energy Source Orders
    • 5 - Transmission and Distribution Circuit Orders
    • 6- Emergency Orders
    • 7 - Composite Network Orders

    • L
    • T - Transmission¬†
    • D - Distribution
    • G - Generation
    • J - Joint
  10. What is a circuit breaker used for?

    What is a disconnect switch used for?
    Interrupt both load and fault current.

    Visual seperation
  11. What authorization do PSSP Category 2 workers have?
    access to the power system
  12. What authorization do PSSP Category 3 workers have?
    work on the power system that does not require an SPG except under a Protection Extension
  13. What authorization do PSSP Category 4 workers have?
    • Certified utility arborists
    • ANRP's for tree trimming
  14. What authorization do PSSP Category 5 workers have?
    Receive SPG's and Live Line Permits

    Issue Protection Extension to Category 3 workers

    Isolate level V equipment to take Self Protection
  15. What authorization do PSSP Category 6 workers have?
    Authorized to receive Operating Authority

    PIC duties

    issue SPG's, LLP's, and ANRP's.
  16. What is the definition of "energized"?
    Any electrical energy that could potentially harm workers.
  17. Which permit is used for work "near" energized equipment? What PSSP Category must the worker hold to receive the permit?
    Assurance of No Reclose Permit (ANRP) 

    Cat. 4
  18. Which permit is used for work "on" energized equipment? What PSSP Category must the worker hold to receive the permit?
    Live Line Permit (LLP)

    Cat. 5
  19. What key things need to be mentioned when issuing a permit for work "on" or "near" energized equipment?
    • Name
    • Circuit
    • Location
    • Time
    • Contact number
  20. What must be blocked before a permit is issued for work "on" or "near" energized equipment?
    Automatic reclose blocking on the nearest source side recloser.
  21. Which program is used to track permits for work "on" or "near" energized equipment?
    P3

    Control Room Operations Window (CROW)
  22. What is meant by the term "reclose"? How is this different than "re-energizing"?
    Reclosing- energizing a circuit within 60 seconds following a forced outage. Can be manual, automatic, or supervisory

    Re-energizing - manual or supervisory, occurs after the cause of the outage is corrected, isolated and/or investigated.
  23. What is a recloser?
    Reclosers sense and interrupt fault current and automatically restore service after a momentary fault, or they lockout if there is a permanent fault.
  24. What is a "HLT" compliant recloser?
    When Hot Line Tag (HLT) is enabled, the recloser may trip faster than a downstream fuse if a power line fault occurs
  25. What is the process for researching permits for work "on" energized equipment?
    • 1D-50
    • -locate work area on circuit map (primary map or DOD) (between switches)
    • -trace the circuit(s) to the first source side closed switch(es) or field recloser on the circuit map.
    • -Check for temporary changes
    • -trace the circuit on the mimic display back to the feeder circuit breaker
    • -determine status of circuit at the substation
  26. What is the process for researching permits for work "near" energized equipment?
    • 1D-50-locate work area on circuit map (primary map or DOD)
    • -trace the circuit(s) to the first source side closed switch(es) or field recloser on the circuit map.
    • -Check for temporary changes
    • -trace the circuit on the mimic display back to the feeder circuit breaker
    • -determine status of circuit at the substation
  27. What is the definition of "isolated"?
    normal sources of hazardous energy have been disconnected by opening and securing all associated switches or by making a line or bus cut.
  28. What operating order details "distribution switching using disconnect switches"?
    2T-27
  29. Air break disconnect switches must only be opened when..
    there is proven expectation that the current interruption will be successful. No switching instruction will be issued based on guessing the outcome.
  30. What six consequences can occur any time a CB, disconnect switch, or cutout is operated (when energized on at least one side)?
    • Energize a piece of eqipment
    • De-energize a piece of equipment
    • Make parallel or loop
    • Break parallel or loop
    • Pick up load
    • Drop load
  31. As the majority of distribution feeder parallel switching involves field crews..
    it is essential to understand the consequences of operating an energized switch or circuit breaker, and communicating the intended consequences to the field worker when the switching instruction is issued.
  32. What are the 5 R's of switching? Define each.
    Readings: Take max demands and/or observed ammeter readings to determine if equipment ratings and relay settings will not be exceeded

    Ratings: found on one-line

    Reclosing: automatic reclosing must be turned off unless in OO (to protect equipment)

    Reactors: series reactors significantly affect load sharing

    Voltage Regulators: placed in NCO if parallel from same source. Check 2T-27
  33. Series reactors significantly affect load sharing, if their impedances differ. When switching involves breaking distribution feeder loops or parallels...
    the reactor impedance in each branch must be considered to determine the loop impedance and the current shared in each branch.
  34. If a station disconnect has copper/tungsten alloy arc horns and a swing handle operator, the disconnect is capable of interrupting up to _____?
    350A
  35. Why must you consider ferro-resonance when switching?
  36. What is the difference between a temporary and permanent line cut?
    Permanent line cuts must be included in the one-line diagram and mimic display. They will NOT be tagged with "Do Not Operate" tags for the purpose of supporting a SPG.

    Temporary line cuts must be tagged with "Do Not Operate" tag in the field and mimic display. They must be labelled "Temporary Line Cut" on the mimic display to support a SPG.

    1T-09
  37. define SCADA
    Supervisory Control and Data Acquisition

    • Telemetry: communication of data
    • Status Reporting: reports change of status of a device
    • Alarm Reporting: reports corresponding alarm points to control centre
    • Supervisory Control: allows remote operation of devices

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