Equipment Identification

Question 1

There are ? steps that are common to the installation of all substation equipment.

Answer 1

7

Question 2

The minimum separation between bare live conductors in a substation (phase-to-phase) for 69 kilovolts is ? .

Answer 2

31”

Question 3

The minimum clearance for 115 kilovolts from a live conductor to the substation lattice structure is ? .

Answer 3

42”

Question 4

Sulfur hexafluoride (SF6) gas is a common arc quenching medium used in new substation ? .

Answer 4

Circuit Breakers

Question 5

SF6 gas ? and will displace the air at the bottom of a confined space.

Answer 5

is heavier than air

Question 6

Substation breakers are often defined by their ? and their type of operating mechanism.

Answer 6

insulating medium

Question 7

Substation circuit breakers can be operated by ? or ? controls.

Answer 7

AC/DC

Question 8

In new substations of 500 kilovolts, individual single-phase transformers are used because 3-phase transformers at these voltages are extremely large and expensive.

Answer 8

True

Question 9

Disconnects in a substation cannot be used as grounding devices.

Answer 9

False

Question 10

Post insulators found in modern substations are normally porcelain or polymeric.

Answer 10

True

Question 11

Step regulators normally provide 5% or ? regulation.

Answer 11

10%

Question 12

The purpose of installing capacitors in a substation is to reduce ? .

Answer 12

line losses

Question 13

After switching a substation capacitor, wait at least ? minutes before applying a ground.

Answer 13

5

Question 14

The reactor used to counter phase-to-ground capacitance is connected phase-to-ground and is called a(n) ? reactor.

Answer 14

Shunt

Question 15

The most common type of battery used for direct current power in a substation is the ? cell.

Answer 15

lead-acid

Question 16

In substation metering, a VT and a PT are two different types of instrument transformers.

Answer 16

false

Question 17

A substation ? is used on primary high voltage lines and buses to produce a lower voltage that is an exact fractional representation of the primary voltage.

Answer 17

coupling capacitor

Question 18

The most common type of substation is called a(n) ? -insulated substation.

Answer 18

air

Question 19

An electrical line inside a substation yard made out of an aluminum-alloy pipe is called a ? .

Answer 19

bus

Question 20

A(n) ? is used in a substation to filter out high-frequency communication signals on the power conductors.

Answer 20

wave trap

Question 21

A thermography (infrared) survey of a substation will point out any connections, splices, and switch components that are hot.

Answer 21

True