Zorc Surge Suppressors

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Product overview

High Frequency Transient Surge Suppressors
For protection of medium and low voltage motors and transformers

Zorc

Every year huge losses are incurred by end-users because of insulation failures of medium voltage (3kV – 40kV) motors, and dry-type transformers. This can be caused by:

  • Switching transients associated with vacuum and other switchgear resulting in expensive insulation failures of motors and dry-type transformers.
  • Multiple pre-striking and re-striking (re-ignition) at the motor or transformer terminals.

ZORC Surge Suppressors is a unique high frequency transient over voltage surge suppressor for the protection of motors and transformers from steep wave-front, short rise-time, high magnitude, spikes, surges and other transient voltages, generated by switching, lightning and other sources.

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PDF

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Characteristics

The protective characteristics of ZORC units:

  • Eliminates inter-turn insulation failures
  • Extends the life of machine insulation
  • Provides comprehensive insulation co-ordination at all practical surge magnitudes and rise-times
  • Conforms with both the CIGRë and IEEE motor impulse voltage withstand recommendations
  • Halves the magnitude of steep wave-front surges impinging on the load terminals by providing a matched cable terminating impedance under transient conditions, thereby eliminating refraction of steep wave-front surges (i.e. eliminates voltage doubling effects).
  • Eliminates multiple pre-striking and re-striking transients associated with vacuum and other switchgear, by eliminating reflections of the pre-strike and re-strike current wave-fronts, and thus preventing high frequency current zeros in the contact gap of the switch.

Applications

Installed in the following industries:

  • Chemical
  • Petrochemical
  • Underground mining (gold, platinum, coal, other)
  • Surface mining (coal, copper, uranium, iron ore, other)
  • Metal beneficiation (steel, stainless steel, gold, platinum, copper and uranium refineries)
  • Power generation (generators, power station auxiliaries)
  • Pumping (water pumping stations, oil pipelines)

Applied

Specific applications on medium voltage motors, generators, and dry-type and oil immersed transformers include:-

  • Fans
  • Pumps
  • Compressors
  • Mills
  • Crushers
  • Refrigeration machines
  • Motor-generator sets
  • Mine winders
  • Conveyors
  • Underground and surface mini-substations and mobile substations
  • Generators
  • Power station auxiliaries
  • Induction & arc furnaces

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Benefits

Benefits provided by ZORC units :

  • Saves money by eliminating production downtime incurred due to insulation failures of motors and dry-type transformers.
  • Protects new motors and dry-type transformers throughout their service life.
  • Extends the life of motor and dry-type transformer insulation if retrofitted to existing motors and dry-type transformers in service.

Features

ZORC Models to suit various voltages : 400V to 40kV.

ZORC units

  • Available in single phase and three phase units. Single-phase versions are suitable for installing in phase segregated terminal enclosures.

Compact and easy to install

  • Special compact versions that can be fitted within most motor/transformer terminal enclosures or switchgear panels.

PDF

You can view download the PDF by clicking on this icon : pdficon_large