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Area: 421: Power transformers and reactors           Index language:

Hide details for [<u>Section 421-01: General terms</u>]Section 421-01: General terms
421-01-01
power transformer
421-01-02
series reactor
421-01-03
shunt reactor
421-01-04
arc-suppression coil
421-01-05
three-phase earthing transformer
421-01-06
three-phase neutral reactor
421-01-07
core-type transformer (deprecated)
421-01-08
core-type reactor (deprecated)
421-01-09
shell-type transformer (deprecated)
421-01-10
shell-type reactor (deprecated)
421-01-11
auto-transformer
421-01-12
booster transformer
421-01-13
separate winding transformer
421-01-14
oil-immersed type transformer
421-01-15
oil-immersed type reactor
421-01-16
dry-type transformer
421-01-17
dry-type reactor
421-01-18
sealed transformer
421-01-19
sealed reactor
421-01-20
encapsulated-winding dry-type transformer
421-01-21
encapsulated-winding dry-type reactor
421-01-22
non-encapsulated-winding dry-type transformer
421-01-23
non-encapsulated-winding dry-type reactor
Hide details for [<u>Section 421-02: Terminals</u>]Section 421-02: Terminals
421-02-01
line terminal
421-02-02
neutral terminal
421-02-03
corresponding terminals
Hide details for [<u>Section 421-03: Windings</u>]Section 421-03: Windings
421-03-01
winding
421-03-02
phase winding
421-03-03
high-voltage winding
421-03-04
low-voltage winding
421-03-05
intermediate-voltage winding
421-03-06
primary winding
421-03-07
secondary winding
421-03-08
auxiliary winding
421-03-09
stabilizing winding
421-03-10
common winding
421-03-11
series winding
421-03-12
energizing winding
421-03-13
concentric windings
421-03-14
sandwich windings
Hide details for [<u>Section 421-04: Rating</u>]Section 421-04: Rating
421-04-01
rated voltage of a winding
421-04-02
rated voltage ratio (of a transformer)
421-04-03
rated frequency
421-04-04
rated power
421-04-05
rated current (of a winding of a transformer or shunt reactor)
421-04-06
continuous rated current
421-04-07
rated short-time current
421-04-08
rated current of an arc suppression coil
Hide details for [<u>Section 421-05: Tappings</u>]Section 421-05: Tappings
421-05-01
tapping
421-05-02
principal tapping
421-05-03
tapping factor
421-05-04
plus tapping
421-05-05
minus tapping
421-05-06
tapping step
421-05-07
tapping range
421-05-08
tapping voltage ratio (of a pair of windings)
421-05-09
tapping duty
421-05-10
tapping quantities
421-05-11
tapping voltage of a winding
421-05-12
tapping power of a winding
421-05-13
tapping current of a winding
421-05-14
full-power tapping
421-05-15
reduced-power tapping
Hide details for [<u>Section 421-06: Losses and no-load current</u>]Section 421-06: Losses and no-load current
421-06-01
no-load loss
421-06-02
no-load current
421-06-03
load loss
421-06-04
supplementary load loss
421-06-05
total losses
Hide details for [<u>Section 421-07: Impedance voltage, short-circuit impedance and voltage drop</u>]Section 421-07: Impedance voltage, short-circuit impedance and voltage drop
421-07-01
impedance voltage at rated current (for the principal tapping)
421-07-02
short-circuit impedance of a pair of windings
421-07-03
voltage drop or rise for a specified load condition
421-07-04
zero-sequence impedance (of a polyphase winding)
Hide details for [<u>Section 421-08: Temperature rise</u>]Section 421-08: Temperature rise
421-08-01
temperature rise
Hide details for [<u>Section 421-09: Insulation</u>]Section 421-09: Insulation
421-09-01
highest voltage for equipment Um (applicable to a transformer or reactor winding)
421-09-02
rated insulation level
421-09-03
uniform insulation of a winding, (of a transformer or of a reactor)
421-09-04
non-uniform insulation of a winding (of a transformer or of a reactor)
Hide details for [<u>Section 421-10: Connections</u>]Section 421-10: Connections
421-10-01
star connection
421-10-02
delta connection
421-10-03
open-delta connection
421-10-04
zigzag connection
421-10-05
open windings
421-10-06
Scott connection
421-10-07
Leblanc connection
421-10-08
phase displacement
421-10-09
connection symbol
Hide details for [<u>Section 421-11: On-load tap-changers</u>]Section 421-11: On-load tap-changers
421-11-01
on-load tap-changer
421-11-02
tap selector
421-11-03
diverter switch
421-11-04
selector switch
421-11-05
change-over selector
421-11-06
transition impedance
421-11-07
driving mechanism
421-11-08
set of contacts
421-11-09
main contacts
421-11-10
main switching contacts
421-11-11
transition contacts
421-11-12
circulating current
421-11-13
switched current
421-11-14
recovery voltage
421-11-15
tap-change operation
421-11-16
cycle of operation
421-11-17
rated through-current
421-11-18
maximum rated through-current
421-11-19
rated step voltage
421-11-20
maximum rated step voltage
421-11-21
number of inherent tapping positions
421-11-22
number of service tapping positions
Hide details for [<u>Section 421-12: On-load tap-changer motor-drive mechanisms</u>]Section 421-12: On-load tap-changer motor-drive mechanisms
421-12-01
motor-drive mechanism
421-12-02
step-by-step control
421-12-03
tap position indicator
421-12-04
tap-change in progress indicator
421-12-05
limit switch
421-12-06
mechanical end stop
421-12-07
parallel control devices
421-12-08
emergency tripping device
421-12-09
overcurrent blocking device
421-12-10
operation counter
421-12-11
manual operation of motor-drive mechanism


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