-
In disagreement
- - red flag, green light (open)
- - double brilliance
- - diaagreement light
-
Not in Agreement
-green flag, right light (closed)
-
In Agreement
- Green flag, green ligjt
-
Peddler
- - a circuit that leaves a dept station to supply only 34.5 kv customer stations
- · universities, refineries, hospitals. etc.
-
Eddy currents
- Iron losses
-
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
-
How many RSs are located in and around Los Angeles
21
-
Nominal Voltage
-All equipment is designed to operate at or near. an optimal electric potential
-
Nominal
- In name
- · an important part of the circuit name that helps distinguish it from other circuits and equipment in the same station
-
IS
34.5Kv customer station
-
CS
4.8kv customer station
-
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
-
RS-G (Atwater) what RSs are directly connected to this station.
Airway RS-Airway, Teluca RS-E, St. John RS-A, Velasco RS-F
-
RS-G (Atwater) How many power banks are installed at this station
3
-
RS-G (Atwater) How many sub transmission sections are at this station.
3, B/C/D
-
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
-
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
-
RS-G (Atwater) What is the bus config on the high side
Double-Bus Double-Breaker
-
RS-G (Atwater) What is the low side bus config
Double-Bus Double-Breaker
-
RS-G (Atwater) What is the low side nominal bus voltage
34.5kv
-
RS-G (Atwater) How are the power banks cooled
Forced oil, forced air
-
RS-G (Atwater) What CB types (arc quenching medium) are installed on the high side of the station
oil, gas, SF6
-
RS-G (Atwater) What CB types are installed on the low side of the station
oil, SF6, vacuum
-
RS-G (Atwater) What type of operating mechanizms are used in the low side CBs
Pnuematic, Hydraulic, spring
-
RS-G (Atwater) What type of operating mechanisms are used in the high side
Pnuematic, hydraulic, spring, solinoid
-
RS-G (Atwater) Can the high side CBs be isolated from the high buses
NO, 230kv buses are hard wired
-
RS-G (Atwater) Can the low side CBs be isolated from the low side buses
YES, by 6 pole gang operated disc
-
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
-
RS-G (Atwater) Which buses can be connected via bus tie
34.5 sec B/C/D
-
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
-
RS-G (Atwater) In what sections are Bus tie CBs located?
All three low side sections B/C/D
-
RS-G (Atwater) Is the subtrans voltage regulated and if so how?
Yes, bank LTC (Load Tap Changers)
-
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
-
DS-48 (Tujunga) What stations are connected?
RS-M Valley-Tujunga Line 1, DS-72 Sunland Tujunga
-
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
-
DS-48 (Tujunga) How are banks cooled?
Forced Air, Oil
-
DS-48 (Tujunga) What is the high side bus config
Double-Bus, Single Breaker
-
DS-48 (Tujunga) What type of CBs are used on the high side and the low side?
Oil. SF6 Circuit Switcher, Vacuum, SF6
-
DS-48 (Tujunga) Can the high side CBs be isolated from the 34.5kv Bus tie?
Yes
-
DS-48 (Tujunga) Which buses can be connected by the 34.5kv Bus Tie?
34.5kv Bus 1/2
-
DS-48 (Tujunga) What type Feeder regulators are installed
Step type
-
DS-48 (Tujunga) Operating mechanism used on the Bank 4.8kv CBs? What is the arc quenching medium?
Solenoid, pneumatic.....oil
-
DS-48 (Tujunga) What is the 4.8kv bus config with respect to the banks
Double-Bus Double Breaker
-
DS-7 (Civic Center) What make this DS different from other DSs you've visited?
LRC, Load Ratio Control
-
DS-7 (Civic Center) What type of feeder CB is used in the station?
Rackout ACB...Air magnetic
-
DS-7 (Civic Center) What are the advantages of this type of design?
Compact, less maintenance, reduced oil
-
DS-7 (Civic Center) What stations are connected to DS-7
RS-P, RS-A
-
DS-7 (Civic Center) What type of disconnects are used on the low side of this
Rackout CBs, Hook Stick operated LIDs
-
DS-7 (Civic Center) What type of disconnects are on the high side
6 pole gang operated, 3 pole gang operated
-
DS-7 (Civic Center) What is the high side bus config
Double-Bus Double- Breaker
-
DS-7 (Civic Center) What type of cooling is used on the banks
Forced Air Oil, FOA
-
DS-7 (Civic Center) Are there any 4.8kv bus ties CBs?
Yes, 10
-
Source
- Circuit that is a normal supplier of energy
- *The circuit from which current flows
-
Load
- The circuit that is connected to the source
- *The circuit to which current flows
-
Circuit breakers
allows circuits and equipment to be electronically connected or disconnected from other circuits and equipment
-
Disconnects
allows circuit equipment to be physically connected and disconnected or from circuits or equipment
-
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"
-
Energized
when the banks high side CB or LID is closed, and current flows into the banks windings
-
HSIT
- Hazardous Substance Information and Training Act
- - 1983
- - Known as the Right to Know Law
-
OSHA
FEDERAL Government Occupational Safety and Health Administration
-
Cal/OSHA
California Occupational Safety and Health Administration
-
Hazard Communication Standard (HCS) was developed by _______.
Cal/OSHA
-
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
-
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
-
-
Trichloroethylene/Perchloroethylene
used in liquid filled fuses, and is a carcinogen, contact may cause
- Dermatitis
- Headache
- Nausea
- Nose/Throat irritation
- Narcosis
-
Asbestos
Found in older equipment, usually as an insulation
-
Simple Asphyxiants
Displace oxygen and can cause suffocation
-
Sulfur Hexafluoride SF6
when exposed to an arc, decomposes forming toxic gas and metallic fluoride dust
-
Used in fire extinguishers and in fire suppression systems in oil houses and underground DSs
Carbon Dioxide
-
Used for pressuring 34.5kv cables, 230kv cable oil tanks, and transformers
Nitrogen
-
Found in synchronous condensers and battery rooms
Hydrogen
-
Has been almost completely removed from DWP work sites and equipment, but not necessarily from customer stations that the department services
Polychlorinated Biphenyls (PCBs)
-
Used in mercury switches in regulators, transformers, thermostats, thermometers, Mercoid switches and manometers, evaporates at 122°F
Mercury
-
Found in battery electrolyte, extremely corrosive to all human tissue as a liquid, vapor or mist
Sulfuric Acid
-
DS-23 (Indiana) What stations are connected
RS-F Velasco
-
DS-23 (Indiana) What is the high side bus config
Ring Bus
-
DS-23 (Indiana) What is the low side bus config with respect to the banks
Double bus single breaker
-
DS-23 (Indiana) Name the 4.8kv buses
Front Bus, Rear Bus, Transfer Bus
-
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
-
DS-23 (Indiana) How is this Station Service normally supplied?
From 4.8kv front bus
-
DS-23 (Indiana) What type of CBs are use on the high side
Air blast, vacuum
-
DS-23 (Indiana) What type of CBs are used on the low side
Oli, Vacuum
-
DS-23 (Indiana) How do the subtransmission circuits enter the station
Through the roof
-
DS-23 (Indiana) What type of disconnects are used on the high side of the station
Hook stick
-
DS-23 (Indiana) What type of disc are used on the low side of the station
Gang operated
-
DS-23 (Indiana) Which buses can be connected by the 4,8kv Bus Tie
4.8kv front bus, 4.8kv rear bus → TBT
-
DS-23 (Indiana) How do the Feeders leave the station
Underground
-
DS-23 (Indiana) What type of Feeder regulators are installed in this station
Step type
-
An unintentional current path where uncontrolled current flows from a circuit conductor to ground or between phases of the same or other circuits
Fault
-
When the fault current path is great enough to cause rapid and forceful fragmentation of an insulator or bushing
Porcelain "grenade"
-
power outages are intentionally caused to isolate circuits to clear a fault
Short term
-
What is used to prevent fault conditions in applications where current values are relatively small
Fuses
-
What is used to prevent fault conditions in applications where current values are great
Relays
-
What design factors affect the point at which a fuse will operate
Thickness of the element, material used
-
What are advantages and disadvantages of fuses
- They are inexpensive and reliable
- Lack the capability to be selective
-
Reusability, adjustability, sensitivity and selectivity are characteristics of
Relays
-
An Electric Station Operator is responsible for the proper response to the occurrence of and operations
relay, fuse
-
Loses in a transmission line are greatly reduced by operating at a relatively voltage and current
High, low
-
A sine wave is produced when a conductor is...
rotated 360°
-
Peak amplitude (in a sine wave) occurs at
90°/270°
-
What effects feeder voltage
Load changes
-
Voltmeters are connected to the windings of transformer
secondary, potential
-
Which device limits the flow of current
Reactor
-
The bank connecting Lima-Linda 1 to RS-I is a
Line bank
-
What indicates the last command given at the control switch
flag
-
CBs, disconnects and LIDs are all considered
Electrical switches
-
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
Conservator
-
Capacitance
The ability of a conductor to store an electric charge
-
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
-
Power is most likely generated at
18kv
-
The southern terminus for the Pacific Tie is located where
Sylmar
-
The chief benefit of transformer cooling is
Extended life of transformers, current carrying capacity
-
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
-
Customer equipment may be damaged if the department does not maintain in a specific range
voltage
-
When connecting a circuit to a source of energy, you are the circuit
energizing
-
How is the Station Service supplied at DS-23
4.8kv front bus
-
What is the high side bus configuration of DS-7
Double-bus single-breaker
-
The process of producing ions?
- Ionization
- Loose an electron - positive ion
- Gain an electeon - negative ion
-
Transformer allows the transfer of energy which are completely from each other.
insulated
-
Theft in any form is not allowed and may lead to
suspension, termination
-
A is a device used to spin generators.
turbine
-
A transfer mechanical or thermal energy into electric energy
generator
-
What is meant by the term breaking parallel
separate sources
-
Switching stations may have and to match voltages.
Line bank, bus bank
-
Disconnects can be operated by all of the following except
.
spring tension devices
-
If current resistance increases and the voltage remains constant, circuit will vary .
current, inversely
-
One ampere is defined as electrons flowing past a given point per second.
6.25 x 1018
-
What is the function of the core in a transformer between the primary and secondary windings.
reduced inductive coupling
-
If current resistance remains constant as the voltage increases, circuit will vary
current, directly
-
How are switching stations designed
name only
-
Best insulator will allow to flow
.0070kv
-
4.8kv delta-connected three wire un-grounded power system, what is the nominal phase to ground voltage.
2770 volts
-
Nominal output of the secondary windings of potential transformers
240 volts
-
Trip coil
The component which receives a trip signal from a relay
-
HSIT requires employees to have WHAT available in the workplace?
SDSs
|
|
