week 3 (chapters 7-8)

Question 1

substation is the same as saying ______ __________ or _____ _____?

Answer 1

power station/supply station

Question 2

substations are controlled either ____ or ____?

Answer 2

automatically/manually

Question 3

name the three main functions of substations

Answer 3

1 connect and disconnect lines and equipment
2 change voltage from one level to another
3 adjust voltage and current to control flow of power

Question 4

transmission substations that can ONLY connect/disconnect lines and equipment are called ?

Answer 4

switching stations

Question 5

_________ provide the ability to control the power flow within a given system?

Answer 5

substations

Question 6

designed to step up voltage produced by generators of a power plant?

Answer 6

generation substation

Question 7

installed to change voltage levels to help integrate a system?

Answer 7

transmission substation

Question 8

typically located near large load centers?

Answer 8

sub-transmission substation

Question 9

located in the middle of the load center

Answer 9

distribution sub-stations

Question 10

POP QUIZ: 9 climbing standards?

Answer 10

look listen feel
lock and drop
look up
lock leg
180
3 and 9
climb on quarters
tool inspection
work position

Question 11

this equipment is large and can contain a large amount of mineral oil?

Answer 11

transformers

Question 12

what does LTC stand for in regards to transformers?

Answer 12

load tap changer

Question 13

cuts in or out a portion of the transformer winding which adjusts the voltage to the conditions

Answer 13

LTC (load tap changer)

Question 14

uses oil, air, vacuum, or sulfur-hexafluoride gas to interupt large amounts of current

Answer 14

circuit breakers

Question 15

used to isolate lines and equipment, provide means to connect/disconnect parts to re-rout flow of power, are manually operated by a switchman?

Answer 15

disconnect switches?

Question 16

provide the ability to MEASURE the flow of power in the system

Answer 16

current and potential transformers

Question 17

reduce the current level?

Answer 17

current transformer

Question 18

reduce voltage levels?

Answer 18

potential transformers

Question 19

DEVICES that assist in controlling the flow of power?

Answer 19

capacitors and reactors

Question 20

DEVICE used to automatically adjust the voltage required?

Answer 20

voltage regulator

Question 21

used to mount switches, disconnects, bus conductors, and other equipment on transmission lines?

Answer 21

steel structures

Question 22

critical element in mitigating hazards to workers and public?

Answer 22

ground grid

Question 23

underneath the substation and and extends just beyond the fence line

Answer 23

ground grid

Question 24

copper wire burried 12-18 inches below grade/grid pattern of 8-20 foot squares?

Answer 24

ground grid

Question 25

substations are designed with ___ ___ ________ in case more capacity for power is needed?

Answer 25

room for expansion

Question 26

the public is very concerned about the ________ of substations?

Answer 26

the appearance of substations

Question 27

what are the 5 environmental considerations of substations?

Answer 27

1. appearance 2. EMF 3. sound 4. oil spill contamination 5. fences

Question 28

system that is similar to our interconnected freeways/highways

Answer 28

transmission

Question 29

main objective for transmission lines is?

Answer 29

to deliver power over long distance with minimal power loss

Question 30

transmission lines can be either?

Answer 30

DC or AC

Question 31

what is a key consideration in choosing a structure for transmission lines?

Answer 31

whether 2 circuits are required immediately or or in the future

Question 32

wood poles are popular for transmission lines with voltages at or below _______?

Answer 32

345 KV

Question 33

more aesthetically pleasing and have a longer service life?

Answer 33

tubular steel poles

Question 34

this type of structure is chosen for 345 KV and above, harder to construct, good for double circuit configuration, and have good strength characteristics.

Answer 34

lattice tower

Question 35

what kind of insulators do you find on transmission lines?

Answer 35

``` porcelain suspension porcelain line post polymer suspension polymer line post glass suspension ```

Question 36

what does the term bundled mean?

Answer 36

more than one conductor per phase

Question 37

used to increase capacity, reduce radio noise and corona loss

Answer 37

bundled conductors

Question 38

must have the capacity to carry the power and be strong enough to support itself under high tension

Answer 38

conductor

Question 39

how many volts is 1 kilovolt?

Answer 39

1000

Question 40

765 KV, 500 KV, 345 KV, and 230 KV are all _____ _____ voltages on a ________ line

Answer 40

main grid, transmission

Question 41

138 kv, 115 kv, 69 kv, and 44 kv, are all ___ ___________ voltages on a __________ line

Answer 41

sub transmission, transmission

Question 42

what two functions can shield wires provide?

Answer 42

ground wire for lightning strikes | fiber optic data line (center of cable)

Question 43

magnetic fields can be a factor in determining width of _____ ___ ____ when building transmission lines

Answer 43

right of way

Question 44

it can take how long to secure right of way for transmission lines?

Answer 44

3-5 years

Question 45

a critical element to mitigating hazards to workers and public?

Answer 45

ground grid

Question 46

similar to our inter connected highways/freeways?

Answer 46

transmission

Question 47

what is the only benefit of DC transmission?

Answer 47

large power over long distance

Question 48

wood structures are popular for voltages of ______ and below

Answer 48

345 KV