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Tapchangers0 pages
TAPCHANGER
AT Tapchanger
The ‘AT’ range of single-phase compartment units with
high-speed resistor transition is designed for three-phase
systems with voltages of 44kV and 66kV line end or 132kV
neutral end and nominal rated current of 300A.
A maximum of 17 tapping steps (18 positions) is possible
for linear regulation and 32 steps (33 positions) for
reversing or coarse/fine regulation.
The ‘AT’ tapchanger is designed such that power flow can
be handled in either direction at full-rated current.
The ‘AT’ is an “out-of-tank” flange-mounted tapchanger
where the oil in the switch compartment is kept separate
at all times from the oil in the main transformer.
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Compact
Linear, reversing or coarse/fine versions
Suitable for 1kV, 33kV or 66kV systems, star or delta t
windings
400A version (linear only)
Suitable for 132kV star winding (neutral end only)
Single-phase version available
Vertically-mounted option also available
Manufactured in accordance with IEC 60214 and tt
also complies with many other national and t
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international standards
AE Tapchanger
The ‘AE’ series on-load tapchanger’s are the results of the
successful type ‘AT’ range of designs. The ‘AE’ uses many
common parts from the ‘AT’ including the complete drive
mechanism. This range has a maximum of 17 tapping
steps (18 positions) is possible for linear regulation and 32
steps (33 positions) for reverse or course/fine regulation.
The equipment may be used to regulate three-phase
transformers designed for system voltages of 33kV and
66kV at any position in the winding. The ’AE’ may also
operate on transformers designed for 132kV earthed
neutral three-phase systems regulating at the neutral end
of the winding. The maximum current rating is 500A, with
overload capability in accordance with IEC 60354 and IEC
60076-7.
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t
t
500A current rating
Suitable for 33kV or 66kV systems, line or neutral end
Suitable for 132kV systems (neutral end only)
Maximum 650kVA breaking capacity
Designed in accordance with IEC 60214 and also
t
complies with many other national and international t
standards
