101 Basic Series - Module 27 - CEU Education
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1
When circuit breaker and/or auxiliary equipment is stacked in a medium voltage switchgear structure, temperature requirements must be considered.
True
False
2
In a medium voltage metal-clad switchgear assembly, all main bus and connections are insulated.
True
False
3
Vertical structures of medium voltage switchgear are usually ____ inches wide.
26
36
42
All of the above
4
A weatherproof enclosure that allows switchgear, motor starters, and MCCs to be located in one area is called ________.
Outdoor aisle-less
Sheltered aisle
Common aisle
Outdoors control room
5
The main bus of medium voltage switchgear assemblies are usually solid copper bars.
True
False
6
Circuit breakers in medium voltage switchgear assemblies have three primary connections.
True
False
7
The secondary contact plugs can be manually engaged when the circuit breaker is in the TEST position.
True
False
8
The term "Metal-Clad" means that the structures (and compartments within each structure) are physically separated from each other by grounded metal barriers.
True
False
9
Medium voltage switchgear assemblies generally fall into the voltage categories of 5 and 15kV, 27kV, and 38kV.
True
False
10
When selling Medium Voltage Switchgear in NEMA markets, "Metal-Clad" structures are always used.
True
False
11
Design and proof testing show compliance with ANSI standards and includes:
Short circuit test
Thermal tests
Dielectric tests
Continuous current test
All of the above
12
The circuit breaker makes its primary bus connection using ________.
Power Stabs
Finger Clusters
Clamps
Jaws
13
________ devices check and or regulate the flow of power in medium voltage switchgear.
Control
Switching/Interrupting
Metering
Protective
14
Safety interlocks are not required by governing standards and are supplied as an option by some manufacturers.
True
False
15
Switchgear is a term used to describe assemblies of switching and interrupting devices along with control, metering, protective, and regulating equipment.
True
False
16
The space between the front of the circuit breaker and the front doors of the assembly is occupied by the ________.
Main Bus Compartment
Ground Bus Compartment
Finger Cluster Compartment
Control Compartment
17
Access to the line compartment is made through rear panels or doors.
True
False
18
The automatic shutter system prevents contact with live primary current carrying parts by closing when the breaker is levered out of the "CONNECTED" position.
True
False
19
Primary and secondary electrical connections are made and live when the breaker is in the "TEST" position.
True
False
20
This design component allows breakers and other devices to be withdrawn form their compartments for inspection and maintenance.
Extension Rails
Splints
Rod Extenders
Roller Beams
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