Chap 5 Key Terms 2

Question 1

lockout

Answer 1

Permanent operation that requires visual closure of automatic line reclosers

Question 2

subtransmission lines

Answer 2

High voltage lines generally energized between 69 and 161 KV.They can be as low as 35KV subtransmission lines connect bulk transmission sub stations to industrial customers.Or distribution substations

Question 3

conductivity

Answer 3

Capacity of a material to transmit electricity

Question 4

megawatt

Answer 4

One million watts

Question 5

supervisory control and data acquisition (SCADA)

Answer 5

System that automatically collects data And enables remote control switching operations

Question 6

current

Answer 6

The flow of electricity

Question 7

current surge

Answer 7

In rush of electricity caused when electrical devices Search as motors or Transformers are first switched on at which time.They can drawseveral times their normal operating electrical loadoften occurs when circuits are first reenergized following and outage

Question 8

delta construction

Answer 8

Elect?
Ric distribution configuration with 3 phases.But no common neutral wire.There is no fixed difference between phase to phase and phase to ground voltages

Question 9

minimum vegetation clearance distance (MVCD)

Answer 9

Calculated minimum distance between conductors and vegetation to prevent spark over for various altitudes.And operating voltages that is used in the design of transmission facilities

Question 10

momentary interruption

Answer 10

Transient fault in an electrical system lasting from thirty 32 a hundred and thirty three milliseconds

Question 11

North American Electric Reliability Corporation (NERC)

Answer 11

Not for profit international regulatory authority whose mission is to assure the reliability of the bulk power system in north america

Question 12

Switchyard

Answer 12

Electric facility that does not change voltage but is used to route. Power through various circuits may be strategically designed to compensate for portions of a system that are experiencing power failures. Protecting circuits through disconnect switches, circuit breakers relays and communication systems compare to substate.

Question 13

taps

Answer 13

Wire connection between energize conductor And other electrical equipment such as transformers

Question 14

transformer

Answer 14

Elect?
Rical device that raises or lowers voltage through induction

Question 15

transient fault

Answer 15

Is fault that Affects the dialectic properties of a system For an instant in no longer exist after the power has been Restored

Question 16

distribution lines

Answer 16

In an electric utility system electric supply lines usually energized between two point four and twenty three k v contrast with transmission lines

Question 17

distribution network

Answer 17

In an electric utility system, the portion that delivers electricity to end.Users includes distribution substations primaries distribution transformers secondaries and service lines.

Question 18

electrical potential (voltage)

Answer 18

Difference in electric energy between an energized conductor and an other energized conductor the ground.Or other object

Question 19

neutral wire

Answer 19

Common return path for an electric system

Question 20

transmission interconnect

Answer 20

Region wear transmission or extra high transmission lines are connected.The interconnection allows utilities to transfer electricity both within their systems and among one another

Question 21

insulator

Answer 21

Material with poor conductivity such as fiberglass glass polymers and porcelain used to separate energized conductors from poles or other objects or structures that must not be energized