System Protection CH 4

Question 1

have the interrupters enclosed within a grounded enclosure.

Answer 1

Dead tank breakers

Question 2

has the interrupter installed
within an insulated enclosure

Answer 2

live tank breaker

Question 3

reacts to the magnetic and
electric fields to provide accurate and usable input to relays and metering.

Answer 3

optical sensors

Question 4

typically utilized where there is a need to
use the transmission line to carry a signal to a location to trip a breaker

Answer 4

Coupling capacitor potential devices

Question 5

an inductance that is installed in the line circuit between the coupling capacitor and the substation bus to block the carrier signal from being transmitted into the bus

Answer 5

wave trap

Question 6

have a separate current and/or voltage input that enables the relay to sense which direction the fault current is flowing

Answer 6

overcurrent relays

Question 7

scheme uses relays that measure the
impedance or reactance of the line.

Answer 7

Distance overcurrent relaying

Question 8

a relaying scheme used for transmission protection, where the relays at different line terminals communicate with each other using some type of telecommunication system.

Answer 8

Pilot wire relaying

Question 9

uses the transmission conductors as the
communications medium to send signals to trip or block the tripping of breakers in the event of a fault.

Answer 9

Power line carrier relaying