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thing that transforms (voltages)
primary side
https://ctlsys.com/support/electrical_service_types_and_voltages/
thing that generates power
a generator whose sole function is to provide back-up power when electric power from the local utility is interrupted
secondary side
The National Electrical Code® (NEC®) defines a switchboard
as a large single panel, frame, or assembly of panels on which
are mounted, on the face or back, or both, switches, overcurrent
and other protective devices, buses, and usually instruments.
a big board with a bunch of switches
MAIN-MAIN Configuration
https://www.eandm.com/Products/Content/Siemens/Training/Siemens_Courses.aspx#Switchboards
https://www.youtube.com/watch?v=kXvcL-l0JRM
Uninterruptible Power Supply
3 Potential Transformers
Control Power Transformer
Power Quality Meter
2000A/3-pole Circuit Breaker
https://www.eandm.com/Products/Content/Siemens/Training/Siemens_Courses.aspx#Molded%20Case%20Circuit%20Breakers
Thing that breaks the circuit
Thing that measures power quality
https://download.schneider-electric.com/files?p_enDocType=User+guide&p_File_Name=80330-001-05.pdf&p_Doc_Ref=80330-001-05&_ga=2.47330215.1659351477.1657488674-180963026.1657399078
Auto Throw-Over
Graphic User Interface
(GUI)
https://electrical-engineering-portal.com/6-adjustable-tripping-settings-circuit-breaker
TRIP UNIT
L = Long Time (overload protection, analogous to the inverse-time thermal trip of a thermal/magnetic breaker)
S = Short Time (short circuit protection of low level faults)
I = Instantaneous (short current protection of high level faults, analogous to the instantaneous magnetic trip of a thermal/magnetic breaker)
G = Ground Fault (equipment ground fault protection)
Programmable Logic Controller (PLC)
Automatic Transfer Switch Controller
https://www.nktechnologies.com/wp-content/uploads/application-notes/Current_Transformer_White%20Paper_071415.pdf
SCCR: Short-Circuit Current Rating
A short-circuit current rating (SCCR) is the maximum fault current at a nominal voltage to which an apparatus or system is able to be connected without sustaining damage exceeding defined acceptance criteria. Basically, the maximum amount of current that the switchboard, switchgear or panelboard can be subjected to before it reaches a level of failure outside of the acceptable criteria specified in the appropriate UL Standard.
AIC: Ampere Interrupting Capacity
AIC (kAIC) applies to protective interrupting devices such as circuit breakers and fuses. The unit of measure for AIC is Amps RMS Symmetrical. This is typically in range of 5000 to 200,000 amps and describes the maximum fault current that the protective device can clear safely, without welding closed or causing damage to equipment or personnel.
Note: The difference between SCCR and AIC is that AIC applies to overcurrent protection devices
only, and the SCCR applies to the entire assembled device, which may use as part of its assembly
overcurrent protection devices with an AIC rating.
Fault Current
The fault current is the current that flows through a panel when a short-circuit occurs. As it encounters
various components (lugs, wiring, breakers, dimmer cards, modules, chokes, terminals, etc.), the
impedance of the components reduces the measured current at each point. If a fault (short-circuit) is
created at any point, it is possible to measure the resulting fault current to determine the let-through
current value for a fault at that location.
Please refer to the diagrams on the next page for an example showing the fault current path and
measured let-through current values.
3 Current Transformers
w/CT ratio of 2000:5
2000A BUS, 3 PHASE, 4 WIRE, 480Y/277V, 65,000 Amp Interrupting Capacity/
Available Interrupting Current
https://download.schneider-electric.com/files?p_enDocType=Data+Bulletin&p_File_Name=2700DB9901R407.pdf&p_Doc_Ref=2700DB9901&_ga=2.215053335.1659351477.1657488674-180963026.1657399078
rated for 2000 primary amps at full load.
produce 5A of secondary current when
2000A amps flow through the primary.
If the primary current changes
the secondary current output will change proportionally.
https://www.electrical-installation.org/enwiki/The_Surge_Protection_Device_(SPD)
Protect against transient surge conditions (high voltage variation above 110% of nominal):
Surge Protection Device
thing that protect against surges
Fusible Disconnect Switch
Across-the-line (Direct-on-line)
Starter
Variable Frequency Drive
Solid State Reduced Voltage Starter
Molded Case Circuit Breakers (MCCB’s) are designed to protect against two main types of rises in current: short-circuits and overloads. Instantaneous Trip (IT) Circuit Breakers or MCP are a special type of MCCB, designed without thermal trip elements, used to protect against short-circuits only.
thing that reduces voltage when starting a motor using solid state technology (SCR)
(silicon controlled rectifier/
semiconductor controller rectifier)
Motor Circuit Protector
protect the motor circuit against short circuit only
Motor Starter Contacts
thing that drives an electric motor by varying the frequency and voltage supplied to the electric motor
Full Voltage non Reversing
Overload
https://www.eandm.com/Products/Content/Siemens/Training/Siemens_Courses.aspx#Basics%20of%20AC%20Drives
https://www.eandm.com/Products/Content/Siemens/Training/Siemens_Courses.aspx#Basics%20of%20Control%20Components
https://www.eandm.com/Products/Content/Siemens/Training/Siemens_Courses.aspx#Safety%20Switches
https://www.eandm.com/Products/Content/Siemens/Training/Siemens_Courses.aspx#Basics%20of%20Control%20Components
Non-fusible Disconnect Switch
Panelboard
a smol board with a bunch of switches
208Y/120V
https://www.eandm.com/Products/Content/Siemens/Training/Siemens_Courses.aspx#Panelboards