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This design component allows breakers and other devices to be withdrawn form their compartments for inspection and maintenance.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