CB
Circuit breaker
A switching device that can interrupt a circuit, with specified fault-interruption capability.
SLD / Schematic
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Power distribution
Switching, protection, transformers and power equipment used in electrical distribution drawings. Explore 182 references, with original explanations and public primary sources.
Isolator
Disconnector
A switching device providing an electrical isolation function.
SLD / Schematic
LBS
Load-break switch
A switch with a specified capability to make and break normal load current.
SLD / Schematic
ES
Earthing switch
A switch used to connect an identified circuit section to earth.
SLD / Schematic
FU
Fuse
An overcurrent protective element that interrupts a circuit by melting its fuse link.
SLD / Schematic
Bus
Busbar
A common conductive connection distributing power to connected circuits.
SLD / Schematic
TX
Power transformer
Equipment transferring electrical power between winding circuits.
SLD / Schematic
M
Three-phase motor
An electrical motor load connected to its switching and protective equipment.
SLD / Schematic
C
Capacitor
A capacitive component or bank identified with its circuit function and ratings.
SLD / Schematic
52
AC circuit breaker
The device-function number identifying an AC circuit breaker.
Protection functions
89
Line switch
The device-function number used for a line-switching or disconnecting device in its documented application.
Protection functions
Panel
Switchgear panel
A generic arrangement object linking switching equipment to its manufacturer drawings.
GA objects
Board
Switchboard
A distribution assembly represented by a generic envelope in an arrangement drawing.
GA objects
RMU
Ring main unit
A secondary-distribution switchgear assembly with a selected combination of switching functions.
GA objects
CB 1P
Single-pole circuit breaker
A circuit breaker interrupts one pole of a circuit.
SLD / Schematic
CB TH
Thermal circuit breaker
A thermal circuit breaker uses a temperature-responsive trip mechanism to detect sustained overload.
SLD / Schematic
CB TM
Thermal-magnetic circuit breaker
A thermal-magnetic breaker combines overload response with a magnetic response to high current.
SLD / Schematic
CB LIM
Current-limiting circuit breaker
A current-limiting breaker reduces the fault-current peak and energy passed to downstream equipment within its documented operating range.
SLD / Schematic
RCCB
Residual-current circuit breaker
An RCCB operates on residual current and has no integral overcurrent protection.
SLD / Schematic
RCBO
Residual-current breaker with overcurrent protection
An RCBO combines residual-current operation with overcurrent protection in one device.
SLD / Schematic
CB UV
Circuit breaker with undervoltage release
A breaker undervoltage release changes the breaker operating condition when its control voltage falls below the specified range.
SLD / Schematic
CB ETU
Circuit breaker with electronic trip unit
A breaker electronic trip unit measures current and applies configured protection functions.
SLD / Schematic
MCB
Miniature circuit breaker
An MCB is a compact low-voltage circuit breaker commonly used for final circuits and auxiliary supplies.
SLD / Schematic
MCCB
Moulded-case circuit breaker
An MCCB is a low-voltage circuit breaker built in a moulded insulating case.
SLD / Schematic
ACB
Air circuit breaker
An ACB is a low-voltage circuit breaker using air as its interrupting medium.
SLD / Schematic
CB POLE
Additional circuit-breaker pole
An additional pole is a separately drawn part of a multipole circuit breaker.
SLD / Schematic
SD
Switch-disconnector
A switch-disconnector combines operational switching with an isolation function.
SLD / Schematic
DS LOCK
Lockable disconnector
A lockable disconnector has a mechanism that can retain the isolation position under a specified locking arrangement.
SLD / Schematic
SD LOCK
Lockable switch-disconnector
A lockable switch-disconnector combines an isolation-capable switching device with a documented locking provision.
SLD / Schematic
DS 3POS
Three-position disconnector
A three-position disconnector selects between two paths and an intermediate position.
SLD / Schematic
SSW
Semiconductor power switch
A semiconductor power switch controls a power path electronically.
SLD / Schematic
SSW UNI
Unidirectional semiconductor power switch
A unidirectional semiconductor switch has a specified direction for its power conduction or control behaviour.
SLD / Schematic
SW 2P
Two-pole power switch
A two-pole power switch operates two circuit conductors through a common device.
SLD / Schematic
DS AUX NO
Disconnector auxiliary NO contact
A normally-open disconnector auxiliary contact provides a separate indication or permissive circuit associated with the disconnector mechanism.
SLD / Schematic
DS AUX NC
Disconnector auxiliary NC contact
A normally-closed disconnector auxiliary contact is closed in the documented unactuated reference state.
SLD / Schematic
SW FUSE
Fused switch
A fused switch combines a switching function with fuse protection.
SLD / Schematic
FUSE SW
Fuse-switch
A fuse-switch uses a fuse-link or fuse carrier as part of its moving switching contact system.
SLD / Schematic
FUSE POLE
Additional fused-switch pole
An additional fused-switch pole represents another conductor of a common multipole device.
SLD / Schematic
gG
General-purpose full-range fuse
A gG fuse-link provides full-range overcurrent protection for general applications within its documented ratings.
SLD / Schematic
aM
Motor short-circuit fuse
An aM fuse-link is a partial-range fuse used for motor-circuit short-circuit protection.
SLD / Schematic
gM
Motor full-range fuse
A gM fuse-link is a motor-circuit fuse with a characteristic chosen for starting and fault conditions.
SLD / Schematic
TX 1PH
Single-phase two-winding transformer
A single-phase two-winding transformer transfers energy between separate primary and secondary windings.
SLD / Schematic
TX SCREEN
Electrostatically screened transformer
A screened transformer includes a documented screen between windings.
SLD / Schematic
TX 3W
Three-winding transformer
A three-winding transformer couples three windings through its magnetic system.
SLD / Schematic
TX ADJ
Adjustable-ratio transformer
An adjustable-ratio transformer includes a documented means of varying its voltage ratio.
SLD / Schematic
AT 1PH
Single-phase autotransformer
A single-phase autotransformer uses a winding portion shared electrically by its input and output circuits.
SLD / Schematic
AT 3PH Y
Three-phase star autotransformer
A three-phase star-connected autotransformer has electrically shared winding portions arranged in a three-phase star connection.
SLD / Schematic
TX Y-D
Star-delta transformer
A star-delta transformer connects one winding set in star and the other in delta.
SLD / Schematic
TX D-Y
Delta-star transformer
A delta-star transformer provides a delta-connected winding and a star-connected winding.
SLD / Schematic
TX D-D
Delta-delta transformer
A delta-delta transformer uses delta-connected windings on both sides.
SLD / Schematic
TX Y-Y
Star-star transformer
A star-star transformer has star-connected windings on both sides.
SLD / Schematic
TX Y-Z
Star-zigzag transformer
A star-zigzag transformer combines a star-connected winding set with a zigzag-connected set.
SLD / Schematic
TX Y-Y-D
Star-star-delta three-winding transformer
A star-star-delta transformer includes two star-connected winding sets and a delta tertiary winding.
SLD / Schematic
DELTA
Delta winding connection
A delta winding connects three phase windings in a closed loop.
SLD / Schematic
OPEN D
Open-delta winding connection
An open-delta arrangement uses an incomplete delta connection for a specified transformer or measurement purpose.
SLD / Schematic
STAR Y
Star winding connection
A star winding joins one end of each phase winding at a common point.
SLD / Schematic
Y N
Star winding with accessible neutral
An accessible-neutral star winding brings the common star point to a documented terminal.
SLD / Schematic
ZIGZAG
Zigzag winding connection
A zigzag winding interconnects portions of phase windings in a specified arrangement.
SLD / Schematic
CAP 3PH
Three-phase power-factor capacitor
A three-phase capacitor assembly provides a documented reactive-power function connected to the power circuit.
SLD / Schematic
L
Reactor
A reactor is an inductive component used for a documented power-circuit purpose.
SLD / Schematic
L IRON
Iron-core reactor
An iron-core reactor uses a documented magnetic core to provide its inductive characteristic.
SLD / Schematic
L GAP
Gapped-core inductor
A gapped-core inductor includes a documented air gap in its magnetic circuit.
SLD / Schematic
L ADJ
Adjustable-core inductor
An adjustable-core inductor varies its documented inductive characteristic through a magnetic adjustment.
SLD / Schematic
M 1PH AC
Single-phase AC motor
A single-phase AC motor represents a load supplied from a documented single-phase source.
SLD / Schematic
M 1PH FAN
Single-phase motor with fan
A single-phase motor with an associated fan identifies the driven function as well as the electrical load.
SLD / Schematic
M 3PH
Three-phase AC motor
A three-phase AC motor is a load supplied from three documented phases.
SLD / Schematic
M 3PH FAN
Three-phase motor with fan
A three-phase motor with fan identifies an electrically driven ventilation or cooling load.
SLD / Schematic
M WR
Wound-rotor induction motor
A wound-rotor induction motor includes a rotor winding arrangement with documented external connections.
SLD / Schematic
M 3PH SYNC
Three-phase synchronous motor
A synchronous motor operates with a documented synchronous relationship to the electrical supply.
SLD / Schematic
M DC
DC motor
A DC motor represents a documented DC electrical load whose armature and any field winding arrangements need to be identified.
SLD / Schematic
M DC PM
Permanent-magnet DC motor
A permanent-magnet DC motor uses a permanent magnetic field rather than a separately connected field winding.
SLD / Schematic
M DC SERIES
Series-excited DC motor
A series-excited DC motor connects its documented field winding in series with the armature circuit.
SLD / Schematic
M DC SEP
Separately excited DC motor
A separately excited DC motor has a documented field circuit supplied separately from the armature circuit.
SLD / Schematic
ACB
Air circuit breaker
An air circuit breaker interrupts a low-voltage power circuit and occupies a substantial assembly compartment.
GA objects
MCCB
Moulded-case circuit breaker
A moulded-case breaker combines circuit switching and overcurrent protection in an insulated case.
GA objects
MCB
Miniature circuit breaker
A miniature breaker is a compact protective device commonly arranged in rows on a rail or distribution-board support.
GA objects
RCCB
Residual-current circuit breaker
An RCCB detects residual current and opens its associated circuit, with its function specified independently of overcurrent protection.
GA objects
RCBO
Residual-current breaker with overcurrent protection
An RCBO combines residual-current and overcurrent functions in one device.
GA objects
GA
DC circuit breaker
A DC breaker is selected to interrupt a specified direct-current circuit.
GA objects
MPCB
Motor-protection circuit breaker
A motor-protection breaker provides switching and specified motor-circuit protective functions.
GA objects
GA
Switch disconnector
A switch disconnector provides the specified switching and isolation function for a power circuit.
GA objects
GA
Fuse-switch disconnector
A fuse-switch assembly combines a switching arrangement with replaceable fuses.
GA objects
GA
Fuse holder
A fuse holder supports and connects a replaceable fuse selected for the circuit.
GA objects
GA
AC line reactor
A line reactor is an inductive device placed in a power circuit for a specified application.
GA objects
GA
Control transformer
A control transformer supplies an auxiliary circuit at the specified voltage.
GA objects
GA
Power-factor-correction capacitor bank
A capacitor bank supplies reactive power compensation under the specified control scheme.
GA objects
GA
Active harmonic filter cabinet
An active harmonic filter uses controlled power electronics for its specified compensation functions.
GA objects
SPD
Surge protective device assembly
A surge protective device limits specified transient overvoltages through its connected protection paths.
GA objects
GA
Flexible busbar connection
A flexible busbar connection joins selected conductors or equipment terminals.
GA objects
GA
Rigid busbar assembly
A busbar assembly carries power through a defined set of conductors and supports.
GA objects
GA
Busbar support insulator
A support insulator locates and separates busbar conductors within an assembly.
GA objects
GA
Busway tap-off unit
A tap-off unit connects an outgoing circuit to the selected busbar trunking system.
GA objects
GA
Motor control centre lineup
A motor control centre groups motor feeder equipment into an assembly.
GA objects
LR Series line reactors
AutomationDirect LR Series line reactors
AutomationDirect LR Series line reactors is a ac line reactor product family referenced for electrical equipment layout.
GA objects
Gladiator CFS disconnects
AutomationDirect Gladiator CFS disconnects
AutomationDirect Gladiator CFS disconnects is a fuse-switch disconnector product family referenced for electrical equipment layout.
GA objects
WMZT miniature circuit breakers
AutomationDirect WMZT miniature circuit breakers
AutomationDirect WMZT miniature circuit breakers is a miniature circuit breaker product family referenced for electrical equipment layout.
GA objects
Edison Class T fuses
AutomationDirect Edison Class T fuses
AutomationDirect Edison Class T fuses is a fuse holder product family referenced for electrical equipment layout.
GA objects
BM3 manual motor starters
Fuji Electric BM3 manual motor starters
Fuji Electric BM3 manual motor starters is a motor-protection circuit breaker product family referenced for electrical equipment layout.
GA objects
G-Twin Lambda circuit breakers
Fuji Electric G-Twin Lambda circuit breakers
Fuji Electric G-Twin Lambda circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.
GA objects
G-Twin circuit breakers
Fuji Electric G-Twin circuit breakers
Fuji Electric G-Twin circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.
GA objects
EA-UL / SA-UL circuit breakers
Fuji Electric EA-UL / SA-UL circuit breakers
Fuji Electric EA-UL / SA-UL circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.
GA objects
EG-UL / SG-UL circuit breakers
Fuji Electric EG-UL / SG-UL circuit breakers
Fuji Electric EG-UL / SG-UL circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.
GA objects
TemPower AT air circuit breakers
Terasaki TemPower AT air circuit breakers
Terasaki TemPower AT air circuit breakers is a air circuit breaker product family referenced for electrical equipment layout.
GA objects
TemBreak 1 legacy MCCBs
Terasaki / NHP TemBreak 1 legacy MCCBs
Terasaki / NHP TemBreak 1 legacy MCCBs is a moulded-case circuit breaker product family referenced for electrical equipment layout.
GA objects
MasterPact MTZ
Schneider Electric MasterPact MTZ
Schneider Electric MasterPact MTZ is a air circuit breaker product family referenced for electrical equipment layout.
GA objects
MasterPacT MTZ Active
Schneider Electric MasterPacT MTZ Active
Schneider Electric MasterPacT MTZ Active is a air circuit breaker product family referenced for electrical equipment layout.
GA objects
ComPacT NSX, new generation
Schneider Electric ComPacT NSX, new generation
Schneider Electric ComPacT NSX, new generation is a moulded-case circuit breaker product family referenced for electrical equipment layout.
GA objects
ComPacT NSXm, new generation
Schneider Electric ComPacT NSXm, new generation
Schneider Electric ComPacT NSXm, new generation is a moulded-case circuit breaker product family referenced for electrical equipment layout.
GA objects
ComPacT for DC networks, new generation
Schneider Electric ComPacT for DC networks, new generation
Schneider Electric ComPacT for DC networks, new generation is a dc circuit breaker product family referenced for electrical equipment layout.
GA objects
Compact INS/INV
Schneider Electric Compact INS/INV
Schneider Electric Compact INS/INV is a switch disconnector product family referenced for electrical equipment layout.
GA objects
Acti9 iC60
Schneider Electric Acti9 iC60
Schneider Electric Acti9 iC60 is a miniature circuit breaker product family referenced for electrical equipment layout.
GA objects
Acti9 iC60 RCBO
Schneider Electric Acti9 iC60 RCBO
Schneider Electric Acti9 iC60 RCBO is a residual-current breaker with overcurrent protection product family referenced for electrical equipment layout.
GA objects
TeSys GV2, LC
Schneider Electric TeSys GV2, LC
Schneider Electric TeSys GV2, LC is a motor-protection circuit breaker product family referenced for electrical equipment layout.
GA objects
PowerLogic PFC Capacitor Banks
Schneider Electric PowerLogic PFC Capacitor Banks
Schneider Electric PowerLogic PFC Capacitor Banks is a power-factor-correction capacitor bank product family referenced for electrical equipment layout.
GA objects
MNS switchgear
ABB MNS switchgear
ABB MNS switchgear is a low-voltage switchgear lineup product family referenced for electrical equipment layout.
GA objects
ReliaGear SG switchgear
ABB ReliaGear SG switchgear
ABB ReliaGear SG switchgear is a low-voltage switchgear lineup product family referenced for electrical equipment layout.
GA objects
UniGear switchgear
ABB UniGear switchgear
ABB UniGear switchgear is a medium-voltage switchgear lineup product family referenced for electrical equipment layout.
GA objects
GA
Medium-voltage switchgear lineup
A medium-voltage switchgear lineup groups specified switching, protection and connection panels.
GA objects
GA
Low-voltage switchgear lineup
A low-voltage switchgear lineup groups specified incoming, outgoing and bus-section equipment.
GA objects
CB
ANSI/IEEE circuit breaker symbol
IEEE-oriented graphical reference for circuit breaker, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
CB TH
ANSI/IEEE thermal circuit breaker symbol
IEEE-oriented graphical reference for thermal circuit breaker, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
CB TM
ANSI/IEEE thermal-magnetic circuit breaker symbol
IEEE-oriented graphical reference for thermal-magnetic circuit breaker, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
CB LIM
ANSI/IEEE current-limiting circuit breaker symbol
IEEE-oriented graphical reference for current-limiting circuit breaker, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
CB UV
ANSI/IEEE circuit breaker with undervoltage release symbol
IEEE-oriented graphical reference for circuit breaker with undervoltage release, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
CB ETU
ANSI/IEEE circuit breaker with electronic trip unit symbol
IEEE-oriented graphical reference for circuit breaker with electronic trip unit, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
Isolator
ANSI/IEEE disconnector symbol
IEEE-oriented graphical reference for disconnector, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
SD
ANSI/IEEE switch-disconnector symbol
IEEE-oriented graphical reference for switch-disconnector, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
DS LOCK
ANSI/IEEE lockable disconnector symbol
IEEE-oriented graphical reference for lockable disconnector, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
SD LOCK
ANSI/IEEE lockable switch-disconnector symbol
IEEE-oriented graphical reference for lockable switch-disconnector, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
SW FUSE
ANSI/IEEE fused switch symbol
IEEE-oriented graphical reference for fused switch, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
FU
ANSI/IEEE fuse symbol
IEEE-oriented graphical reference for fuse, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
FUSE SW
ANSI/IEEE fuse-switch symbol
IEEE-oriented graphical reference for fuse-switch, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
TX
ANSI/IEEE power transformer symbol
IEEE-oriented graphical reference for power transformer, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
TX SCREEN
ANSI/IEEE electrostatically screened transformer symbol
IEEE-oriented graphical reference for electrostatically screened transformer, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
TX 3W
ANSI/IEEE three-winding transformer symbol
IEEE-oriented graphical reference for three-winding transformer, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
TX ADJ
ANSI/IEEE adjustable-ratio transformer symbol
IEEE-oriented graphical reference for adjustable-ratio transformer, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
AT 1PH
ANSI/IEEE single-phase autotransformer symbol
IEEE-oriented graphical reference for single-phase autotransformer, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
L
ANSI/IEEE reactor symbol
IEEE-oriented graphical reference for reactor, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
L IRON
ANSI/IEEE iron-core reactor symbol
IEEE-oriented graphical reference for iron-core reactor, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
L GAP
ANSI/IEEE gapped-core inductor symbol
IEEE-oriented graphical reference for gapped-core inductor, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
L ADJ
ANSI/IEEE adjustable-core inductor symbol
IEEE-oriented graphical reference for adjustable-core inductor, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
M 1PH AC
ANSI/IEEE single-phase ac motor symbol
IEEE-oriented graphical reference for single-phase ac motor, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
M 3PH
ANSI/IEEE three-phase ac motor symbol
IEEE-oriented graphical reference for three-phase ac motor, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
M WR
ANSI/IEEE wound-rotor induction motor symbol
IEEE-oriented graphical reference for wound-rotor induction motor, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
M DC
ANSI/IEEE dc motor symbol
IEEE-oriented graphical reference for dc motor, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
M DC PM
ANSI/IEEE permanent-magnet dc motor symbol
IEEE-oriented graphical reference for permanent-magnet dc motor, with public vendor evidence and drawing-reading notes.
IEEE / ANSI
Q070103
Isolation-function qualifier
An isolation qualifier identifies the documented disconnector function attached to a switching representation.
IEC
Q070104
Switch-disconnector function qualifier
This qualifier identifies combined switching and isolation in the associated representation.
IEC
Q070102
Circuit-breaker function qualifier
A breaker-function qualifier identifies automatic interruption capability in the compound representation.
IEC
Q070101
Power-contactor function qualifier
This qualifier marks the power-contactor function of the associated switching device.
IEC
Q060201
Two-phase winding connection
This connection qualifier identifies a two-phase winding arrangement in the publisher's reference family.
IEC
Q060202
Partial-V winding connection
This qualifier identifies the publisher's partial-V three-phase winding form.
IEC
Q060203
Four-phase winding with accessible connection
This qualifier identifies a four-phase winding form with an accessible connection described by the publisher as accessible ground.
IEC
Q060204
Three-phase T winding connection
A T winding qualifier identifies the publisher's three-phase T connection form.
IEC
Q060210
Six-phase double-delta winding connection
This qualifier identifies a six-phase winding arrangement using the publisher's double-delta form.
IEC
Q060211
Six-phase polygon winding connection
A polygon winding qualifier identifies the publisher's six-phase polygon connection.
IEC
Q060212
Six-phase star winding connection
This qualifier identifies a six-phase winding connected at a common star point.
IEC
Q060213
Six-phase double-zigzag winding connection
This qualifier identifies the publisher's six-phase double-zigzag form with an accessible connection.
IEC
Q020201
Direct-current supply qualifier
A direct-current qualifier identifies the supply character associated with a circuit or device.
IEC
Q020204
Alternating-current supply qualifier
An alternating-current qualifier identifies the supply character of a represented circuit.
IEC
Q020212
Rectified-current with AC component qualifier
This qualifier distinguishes rectified current with a remaining alternating component.
IEC
HMO14
Three-phase motor with four connections
This representation distinguishes the publisher's three-phase motor form with four indicated connections.
IEC
HMO1M3
Three-phase induction motor with series excitation
This representation identifies the publisher's asynchronous motor form with series excitation.
IEC
HMO1M5
Star-stator wound-rotor motor with rotor starter
This representation distinguishes star-connected stator and a starter arrangement associated with the rotor circuit.
IEC
HMO1M11
Six-pole asynchronous motor
This form identifies the publisher's six-pole asynchronous motor representation.
IEC
HMO1M10
Single-phase series-connected AC motor
This representation distinguishes the publisher's single-phase AC motor with series connection.
IEC
HMO1M16
Single-phase synchronous motor
This representation identifies a single-phase synchronous machine function.
IEC
HMO1M14
Permanent-magnet linear DC motor
This representation identifies linear motion produced by a permanent-magnet DC machine.
IEC
HMO1M15
Permanent-magnet stepping motor
This representation identifies a permanent-magnet stepping-motor function.
IEC
HMO1M8
Shunt-excited DC motor
This representation distinguishes the publisher's derived or shunt-excitation DC motor form.
IEC
HDV1_BT_1-
One-line bus tap
A bus-tap representation identifies a branch from a bus in a simplified power circuit.
IEC
3~
Three-phase conductor group
A conductor group represents the documented phase conductors of a circuit shown individually.
SLD / Schematic
Dy5
Dy5 transformer connection reference
This reference identifies the publisher's Dy5 transformer connection form with delta/star winding topology.
IEC
Dd6
Dd6 transformer connection reference
This reference identifies the publisher's Dd6 transformer connection form with delta/delta winding topology.
IEC
Yd5
Yd5 transformer connection reference
This reference identifies the publisher's Yd5 transformer connection form with star/delta winding topology.
IEC
Yy6
Yy6 transformer connection reference
This reference identifies the publisher's Yy6 transformer connection form with star/star winding topology.
IEC
Yd11
Yd11 transformer connection reference
This reference identifies the publisher's Yd11 transformer connection form with star/delta winding topology.
IEC
Dy11
Dy11 transformer connection reference
This reference identifies the publisher's Dy11 transformer connection form with delta/star winding topology.
IEC
Dz0
Dz0 transformer connection reference
This reference identifies the publisher's Dz0 transformer connection form with delta/zigzag winding topology.
IEC
Yz5
Yz5 transformer connection reference
This reference identifies the publisher's Yz5 transformer connection form with star/zigzag winding topology.
IEC
Dz6
Dz6 transformer connection reference
This reference identifies the publisher's Dz6 transformer connection form with delta/zigzag winding topology.
IEC
Yz11
Yz11 transformer connection reference
This reference identifies the publisher's Yz11 transformer connection form with star/zigzag winding topology.
IEC