grounding/grids

Question 1

A low-resistance, well-designed, and well-constructed ground grid is necessary to provide improved ?

Answer 1

worker safety

Question 2

One reason a well-grounded substation neutral provides improved power quality is because ? need a solid ground reference to properly operate switchgear.

Answer 2

control relays

Question 3

The design of a substation ground grid starts with choosing a site location where ? is present, which has the ability to dissipate power surges.

Answer 3

good earth

Question 4

If a ground grid needs lower resistivity, deep-drilled wells back-filled with ? can be used.

Answer 4

a highly conductive clay such as bentonite

Question 5

Electrical connections on a ground grid need to be fail-safe, so that when there is a rise in potential on the total grounding network in the station, everything will remain bonded together.

Answer 5

true

Question 6

Crushed stone is a good product to cover a substation ground grid because it offers some protection when stepping from the grid to a ?

Answer 6

remote ground

Question 7

An extra metal mesh or platform is installed where switches need to be operated in a substation in order to provide extra protection from ? for switch operators.

Answer 7

touch and step potentials

Question 8

Workers are protected from ? because the design and spacing of the substation ground grid does not place one foot of a worker at a different potential from the other foot.

Answer 8

step potentials