AT & ATV Tapchangers


The AT and ATV range of single 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 positions (16 steps) 15 possible for linear regulation and 33 tapping positions (32 steps) for reversing of course/fine regulation.

The AT tapchanger is designed such that power flow can be handled in either direction at full-rated current. The AT is a flange-mounted tapchanger where the oil in the switch compartment is kept separate at all times from the oil in the main transformer.

  • Compact
  • Linear, reversing or coarse/fine versions
  • Suitable for 52kV, star or delta windings
  • 400A version (linear only)
  • Suitable for 145kV star winding (neutral end only)
  • Single-phase version available
  • Vertically-mounted option also available
  • Compact
  • Bi-directional power flow
  • High Speed Resistor on-load selector switch
  • Ease of maintenance
  • Low oil content
  • Up to 17 positions (linear) or 33 positions (reverse or coarse/fine)
  • Fully automatic or manual operation
  • Can be mounted horizontally (AT) or vertically (ATV)

Manufactured in accordance with IEC 60214 and also complies with many other national and international standards

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