ESOT Eval Manual

  1. In disagreement
    • - red flag, green light (open)
    • - double brilliance
    • - diaagreement light
  2. Not in Agreement
    -green flag, right light (closed)
  3. In Agreement
    - Green flag, green ligjt
  4. Peddler
    • - a circuit that leaves a dept station to supply only 34.5 kv customer stations
    • · universities, refineries, hospitals. etc.
  5. Eddy currents
    - Iron losses
  6. What is the basic principle of correct nomenclature
    A complete name must include the minimum info needed to clearly differentiate the circuit or equipment from all others
  7. How many RSs are located in and around Los Angeles
  8. Nominal Voltage
    -All equipment is designed to operate at or near. an optimal electric potential
  9. Nominal
    • In name
    • · an important part of the circuit name that helps distinguish it from other circuits and equipment in the same station
  10. IS
    34.5Kv customer station
  11. CS
    4.8kv customer station
  12. RS-G (Atwater) What is the section designation for the high voltage side of the station and what is its voltage
    Section E 230 kv
  13. RS-G (Atwater) what RSs are directly connected to this station.
    Airway RS-Airway, Teluca RS-E, St. John RS-A, Velasco RS-F
  14. RS-G (Atwater) How many power banks are installed at this station
  15. RS-G (Atwater) How many sub transmission sections are at this station.
    3, B/C/D
  16. RS-G (Atwater) How many circuits are considered to be sources for RS-G and what are their voltages
    • Airway 1/2, Atwater-Velasco 1, Haynes-Atwater 1,Teluca-Atwater 1, Atwater-Airway 1/2, Atwater-St. John 1...230kv
    • 6 lines, no cables
  17. RS-G (Atwater) What are names of the stations at the remote ends of these circuits
    RS-E Teluca, RS-F Velasco, RS-A St. John, RS-Airway, Haynes Generating Station
  18. RS-G (Atwater) What is the bus config on the high side
    Double-Bus Double-Breaker
  19. RS-G (Atwater) What is the low side bus config
    Double-Bus Double-Breaker
  20. RS-G (Atwater) What is the low side nominal bus voltage
  21. RS-G (Atwater) How are the power banks cooled
    Forced oil, forced air
  22. RS-G (Atwater) What CB types (arc quenching medium) are installed on the high side of the station
    oil, gas, SF6
  23. RS-G (Atwater) What CB types are installed on the low side of the station
    oil, SF6, vacuum
  24. RS-G (Atwater) What type of operating mechanizms are used in the low side CBs
    Pnuematic, Hydraulic, spring
  25. RS-G (Atwater) What type of operating mechanisms are used in the high side
    Pnuematic, hydraulic, spring, solinoid
  26. RS-G (Atwater) Can the high side CBs be isolated from the high buses
    NO, 230kv buses are hard wired
  27. RS-G (Atwater) Can the low side CBs be isolated from the low side buses
    YES, by 6 pole gang operated disc
  28. RS-G (Atwater) What type of disc are found in the switchrack, generally
    6 pole gang operated, gang operated, 3 pole gang operated high side
  29. RS-G (Atwater) Which buses can be connected via bus tie
    34.5 sec B/C/D
  30. RS-G (Atwater) Can sect E connect directly to sect C through a bus tie? If yes, how many CBs must be opened to make this connection?
    NO, sect E 230kv, sect C 34.5kv
  31. RS-G (Atwater) In what sections are Bus tie CBs located?
    All three low side sections B/C/D
  32. RS-G (Atwater) Is the subtrans voltage regulated and if so how?
    Yes, bank LTC (Load Tap Changers)
  33. RS-G (Atwater) What DSs are supplied by the banks at this station?
    DS-26 Belmont, DS-54 Los Feliz, DS-15 Commonwealth, DS-30 Eagle Rock, DS-93 La Salle Park, DS-2 Garbanza, Ds-36 Marmion DS-114 Crystal Springs, DS-25 Riverside
  34. DS-48 (Tujunga) What stations are connected?
    RS-M Valley-Tujunga Line 1, DS-72 Sunland Tujunga
  35. DS-48 (Tujunga) How many banks are installed and what size (Volt-ampere Capacity)
    2 Banks 20 MVA (Mega Volt Amps) 6.6666 MVA each
  36. DS-48 (Tujunga) How are banks cooled?
    Forced Air, Oil
  37. DS-48 (Tujunga) What is the high side bus config
    Double-Bus, Single Breaker
  38. DS-48 (Tujunga) What type of CBs are used on the high side and the low side?
    Oil. SF6 Circuit Switcher, Vacuum, SF6
  39. DS-48 (Tujunga) Can the high side CBs be isolated from the 34.5kv Bus tie?
  40. DS-48 (Tujunga) Which buses can be connected by the 34.5kv Bus Tie?
    34.5kv Bus 1/2
  41. DS-48 (Tujunga) What type Feeder regulators are installed
    Step type
  42. DS-48 (Tujunga) Operating mechanism used on the Bank 4.8kv CBs? What is the arc quenching medium?
    Solenoid, pneumatic.....oil
  43. DS-48 (Tujunga) What is the 4.8kv bus config with respect to the banks
    Double-Bus Double Breaker
  44. DS-7 (Civic Center) What make this DS different from other DSs you've visited?
    LRC, Load Ratio Control
  45. DS-7 (Civic Center)  What type of feeder CB is used in the station?
    Rackout ACB...Air magnetic
  46. DS-7 (Civic Center)  What are the advantages of this type of design?
    Compact, less maintenance, reduced oil
  47. DS-7 (Civic Center) What stations are connected to DS-7
    RS-P, RS-A
  48. DS-7 (Civic Center) What type of disconnects are used on the low side of this
    Rackout CBs, Hook Stick operated LIDs
  49. DS-7 (Civic Center) What type of disconnects are on the high side
    6 pole gang operated, 3 pole gang operated
  50. DS-7 (Civic Center) What is the high side bus config
    Double-Bus Double- Breaker
  51. DS-7 (Civic Center) What type of cooling is used on the banks
    Forced Air Oil, FOA
  52. DS-7 (Civic Center) Are there any 4.8kv bus ties CBs?
    Yes, 10
  53. Source
    • Circuit that is a normal supplier of energy
    •     *The circuit from which current flows
  54. Load
    • The circuit that is connected to the source
    •     *The circuit to which current flows
  55. Circuit breakers
    allows circuits and equipment to be electronically connected or disconnected from other circuits and equipment
  56. Disconnects
    allows circuit equipment to be physically connected and disconnected or from circuits or equipment
  57. De-energized
    • when a bank's high side or low side CBs or LIDs are open, the bank is electronically disconnected and no current can flow into or through the bank
    •     * "The bank is off"
  58. Energized
    when the banks high side CB or LID is closed, and current flows into the banks windings
  59. HSIT
    • Hazardous Substance Information and Training Act
    •     - 1983
    •     - Known as the Right to Know Law
  60. OSHA
    FEDERAL Government Occupational Safety and Health Administration
  61. Cal/OSHA
    California Occupational Safety and Health Administration
  62. Hazard Communication Standard (HCS) was developed by _______.
  63. Safety Data Sheet (SDS)
    A manufacturer's reference document that includes info about how chemicals can have adverse effects on the health of workers overexposed tp them as well as how to handle chemicals safely
  64. Stoddard Solvents
    used by operators and mechanics to remove silicone from insulators.

    • Nose/Throat - irritation through inhalation
    • Skin contact - Defatting and Dermatitis
    • Eye contact - Conjunctivitis
    • Flammable 
  65. Trichloroethylene/Perchloroethylene
    used in liquid filled fuses, and is a carcinogen, contact may cause

    •     Dermatitis
    •     Headache
    •     Nausea
    •     Nose/Throat irritation
    •     Narcosis
  66. Asbestos
    Found in older equipment, usually as an insulation
  67. Simple Asphyxiants
    Displace oxygen and can cause suffocation
  68. Sulfur Hexafluoride SF6
    when exposed to an arc, decomposes forming toxic gas and metallic fluoride dust
  69. Used in fire extinguishers and in fire suppression systems in oil houses and underground DSs
    Carbon Dioxide
  70. Used for pressuring 34.5kv cables, 230kv cable oil tanks, and transformers
  71. Found in synchronous condensers and battery rooms
  72. Has been almost completely removed from DWP work sites and equipment, but not necessarily from customer stations that the department services
    Polychlorinated Biphenyls (PCBs)
  73. Used in mercury switches in regulators, transformers, thermostats, thermometers, Mercoid switches and manometers, evaporates at 122°F
  74. Found in battery electrolyte, extremely corrosive to all human tissue as a liquid, vapor or mist
    Sulfuric Acid
  75. DS-23 (Indiana) What stations are connected
    RS-F Velasco
  76. DS-23 (Indiana) What is the high side bus config
    Ring Bus
  77. DS-23 (Indiana) What is the low side bus config with respect to the banks
    Double bus single breaker
  78. DS-23 (Indiana) Name the 4.8kv buses
    Front Bus, Rear Bus, Transfer Bus
  79. DS-23 (Indiana) How many banks are there and what size are these banks? What type of cooling is used on the banks
    2 banks, 15MVA each, aided by room exhausted fans, convection cooling
  80. DS-23 (Indiana) How is this Station Service normally supplied?
    From 4.8kv front bus
  81. DS-23 (Indiana) What type of CBs are use on the high side
    Air blast, vacuum
  82. DS-23 (Indiana) What type of CBs are used on the low side
    Oli, Vacuum
  83. DS-23 (Indiana) How do the subtransmission circuits enter the station
    Through the roof
  84. DS-23 (Indiana) What type of disconnects are used on the high side of the station
    Hook stick
  85. DS-23 (Indiana) What type of disc are used on the low side of the station
    Gang operated
  86. DS-23 (Indiana) Which buses can be connected by the 4,8kv Bus Tie
    4.8kv front bus, 4.8kv rear bus → TBT
  87. DS-23 (Indiana) How do the Feeders leave the station
  88. DS-23 (Indiana) What type of Feeder regulators are installed in this station
    Step type
  89. An unintentional current path where uncontrolled current flows from a circuit conductor to ground or between phases of the same or other circuits
  90. When the fault current path is great enough to cause rapid and forceful fragmentation of an insulator or bushing
    Porcelain "grenade"
  91.                   power outages are intentionally caused to isolate circuits to clear a fault
    Short term
  92. What is used to prevent fault conditions in applications where current values are relatively small
  93. What is used to prevent fault conditions in applications where current values are great
  94. What design factors affect the point at which a fuse will operate
    Thickness of the element, material used
  95. What are advantages and disadvantages of fuses
    • They are inexpensive and reliable
    • Lack the capability to be selective
  96. Reusability, adjustability, sensitivity and selectivity are characteristics of              
  97. An Electric Station Operator is responsible for the proper response to the occurrence of         and       operations
    relay, fuse
  98. Loses in a transmission line are greatly reduced by operating at a relatively           voltage and            current
    High, low
  99. A sine wave is produced when a conductor is...
    rotated 360°
  100. Peak amplitude (in a sine wave) occurs at
  101. What effects feeder voltage
    Load changes
  102. Voltmeters are connected to the      windings of      transformer
    secondary, potential
  103. Which device limits the flow of current
  104. The bank connecting Lima-Linda 1 to RS-I is a
    Line bank
  105. What indicates the last command given at the control switch
  106. CBs, disconnects and LIDs are all considered
    Electrical switches
  107. An auxiliary tank that is connected to the main tank of a transformer, normally only partly filled with insulating oil that allows the oil to expand and contact
  108. Capacitance
    The ability of a conductor to store an electric charge
  109. Ground Detector Meter
    Voltmeters that indicate phase to ground voltage (2770V). The meters are used to indicate the presence of an accidental ground on an energized grounded circuit or system
  110. Power is most likely generated at              
  111. The southern terminus for the Pacific Tie is located where
  112. The chief benefit of transformer cooling is
    Extended life of transformers, current carrying capacity
  113. Which of the following is a fault
    • uncontrolled current flows between phases of the same or other circuits
    • contact with ground, trees, etc
    • ionized air
    • All of the above
  114. Customer equipment may be damaged if the department does not maintain                in a specific range
  115. When connecting a circuit to a source of energy, you are                 the circuit
  116. How is the Station Service supplied at DS-23
    4.8kv front bus
  117. What is the high side bus configuration of DS-7
    Double-bus single-breaker
  118. The process of producing ions?
    • Ionization
    • Loose an electron - positive ion
    • Gain an electeon - negative ion
  119. Transformer allows the transfer of energy which are completely                   from each other.
  120. Theft in any form is not allowed and may lead to
    suspension, termination
  121.                  is a device used to spin generators.
  122.                   transfer mechanical or thermal energy into electric energy
  123. What is meant by the term breaking parallel
    separate sources
  124. Switching stations may have                   and                    to match voltages.
    Line bank, bus bank
  125. Disconnects can be operated by all of the following except 
    spring tension devices
  126. If current resistance increases and the voltage remains constant, circuit                         will vary                           .
    current, inversely
  127. One ampere is defined as                       electrons flowing past a given point per second.
    6.25 x 1018
  128. What is the function of the core in a transformer between the primary and secondary windings.
    reduced inductive coupling
  129. If current resistance remains constant as the voltage increases, circuit                         will vary                         
    current, directly
  130. How are switching stations designed
    name only
  131. Best insulator will allow                    to flow
  132. 4.8kv delta-connected three wire un-grounded power system, what is the nominal phase to ground voltage.
    2770 volts
  133. Nominal output of the secondary windings of potential transformers
    240 volts
  134. Trip coil
    The component which receives a trip signal from a relay
  135. HSIT requires employees to have WHAT available in the workplace?
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ESOT Eval Manual