FLANGE MOUNTED
ONLOAD TAPCHANGERS (OLTC)

OVERVIEW

  • Manufactured since 1966 to the design of English Electric, UK

  • Type tested as per IEC: 60214, IS: 8468

  • Voltage ratings (Um) from 12kV to 145 kV delta and star application with current ratings upto 600 Amps in 9, 17, 21 upto 33 positions

  • Compatible for SCADA and all modern data communication equipment and systems.

  • Available in several configurations:

 

FLANGE MOUNTED
ONLOAD TAPCHANGER TYPES

CA16

  • 11 kV 17 position linear 200 A
  • Can be used for delta/ star connected transformers.
  • Compact, 16 step, 17 position on load tapchanger for distribution transformers.
  • Low oil volume with limited band of regulation.

CL08

  • 11 kV 9 position linear 300 A
  • Can be used for delta/ star connected transformers.
  • Compact, 8 step, 9 position on load tapchanger for distribution transformers.
  • Used for applications with limited band of regulation.

CM08

  • 11 kV 9 position linear 200 A
  • Can be used for delta/ star connected transformers.
  • Compact, 8 step, 9 position on load tapchanger for distribution transformers.
  • Used for applications with limited band of regulation.

CM16

  • 11 kV 17 position linear 200 A
  • Can be used for delta/ star connected transformers.
  • 16 step, 17 position on load tapchanger for distribution transformers.
  • Commonly used for applications where fine voltage regulation is required.

DA16

  • 22 kV 17 position linear 200 A
  • Can be used for delta/ star connected transformers.
  • Compact, 16 step, 17 position on load tapchanger for distribution transformers.
  • Low oil volume with limited band of regulation

DM08

  • 22 kV 9 position linear 300 A
  • Can be used for delta/ star connected transformers.
  • Compact, 8 step, 9 position on load tapchanger for distribution transformers.
  • Used for applications with limited band of regulation.

DM16

  • 22 kV 17 position linear 300 A
  • Can be used for delta/ star connected transformers.
  • 16 step, 17 position on load tapchanger for distribution transformers.
  • Commonly used for applications where fine voltage regulation is required.

EB16

  • 22 kV 17 position 200 A with changeover selector
  • Can be used for delta/ star connected transformers.
  • Compact, 16 step, 17 position on load tapchanger for distribution transformers.
  • Low oil volume with limited band of regulation.
  • Suitable for coarse-fine/ reversing winding.

EL08

  • 33 kV 9 position linear 300 A
  • Can be used for delta/ star connected transformers.
  • Compact, 8 step, 9 position on load tapchanger for distribution transformers.
  • Used for applications with limited band of regulation.

EN16

  • 33 kV 17 position linear 300 A
  • Can be used for delta/ star connected transformers.
  • Legacy product manufactured to English Electric design. 16 step,
  • 17 position on load tapchanger for sub-transmission and distribution transformers.
  • Suitable for furnace application, where number of operations are large.
  • Commonly used for applications where fine voltage regulation is required.

EN20

  • 33 kV 21 position linear 300 A
  • Can be used for delta/ star connected transformers.
  • 20 step, 21 position on load tapchanger for sub-transmission and distribution transformers.
  • Suitable for furnace application, where number of operations are large.
  • Commonly used for applications where fine voltage regulation is required over a wide range of voltage variation.

EO09

  • 33 kV 10 position linear 300 A
  • Can be used for delta/ star connected transformers.
  • Compact, 9 step, 10 position on load tapchanger for distribution transformers.
  • Used for applications with limited band of regulation.

E016

  • 33 kV 17 position 300 A tapchanger with changeover selector.
  • Can be used for delta/ star connected transformers.
  • Compact, 16 step, 17 position on load tapchanger for distribution transformers.
  • Used for applications where fine voltage regulation is required.
  • Suitable for coarse-fine or reversing winding configuration giving desired voltage regulation in limited number of steps.

EQ16

  • 33 kV 17 position linear 500 A
  • Can be used for delta/ star connected transformers.
  • 16 step, 17 position on load tapchanger for transmission and distribution transformers.
  • Suitable for high current applications.
  • Suitable for furnace application where number of operations are large.
  • Used for applications where fine voltage regulation is required.

FQ16

  • 66 kV 17 position linear 300 A
  • Can be used for delta/ star connected transformers.
  • Legacy product manufactured to English Electric design. 16 step, 17 position on load tapchanger for transmission/ network transformers.
  • Commonly used for maintaining grid voltage.
    Suitable for furnace application, where number of operations are large.

FR16

  • 66 kV 17 position linear 300 A
  • Can be used for delta/ star connected transformers.
  • Optimized 16 step, 17 position on load tapchanger for transmission/ network transformers.
  • Commonly used for maintaining grid voltage.

FR20

  • 66 kV 21 position linear 300 A
  • Can be used for delta/ star connected transformers.
  • 20 step, 21 position on load tapchanger for transmission/ network transformers.
  • Commonly used for maintaining grid voltage over a wide range.

GQ16

  • 132 kV 17 position linear 300 A
  • Can be used at neutral end of star connected transformers.
  • 16 step, 17 position on load tapchanger for transmission/ network transformers.
  • Commonly used for maintaining grid voltage.

IUZE

  • Selector switch type external/flange mounted
  • On Load Tapchanger, suitable for distribution, sub-transmission and transmission range of applications.
  • Only flange mounted tapchanger suitable for 132 kV delta application.
  • Voltage rating from 33 to 132 kV and current rating upto 600 A.
  • Available in various combinations of step voltage and currents with application for linear, coarse fine and reversing type of transformer windings.

APPROVALS / COMPLIANCES

  • Transformer Manufacturers
  • Domestic Utilities
  • Private And Public Sector Companies
  • Railways
  • National Thermal Power Corporation (NTPC)
  • Power Grid Corporation Of India Limited (PGCIL)
  • State Electricity Boards
  • Reputed consultants
  • IS 8468
  • IEC 60214-1

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