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Oil Insulated Combined Instrument Transformer Air Insulated Switchgears

Oil Insulated Combined Instrument  Transformer Air Insulated Switchgears
Oil Insulated Combined Instrument Transformer Air Insulated Switchgears
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Product Code : Combined_OIL_INSULATED
Product Description

Oil-insulated combined instrument transformers are used toconvert high transmission line voltages and currents (voltage up to 145kV andcurrent up to 5000 A) to standardized low and easily measurable values, whichare used for metering, protection and control of the high voltage system. Assuch, the need for accurate and reliable voltage and current transformation isessential.

The reliability and security of Trench oil-insulated instrumenttransformers is based on over 100 years of innovation with oil-insulated unitsoperating under a wide range of environmental conditions. Oil-insulatedcombined instrument transformers also ensure suitable electrical insulationbetween high voltage and low voltage measuring equipment.

Our oil-insulated combined transformers are compliant to thelatest international safety standard requirements in terms of explosion-proof,insulating material multiple chopped ageing, seismic qualification and extremetemperature conditions.

Modern production and testing facilities guarentee not onlyshort delivery times but also a reliable operation for many years.

General Features:

  • Portfolio available from 72 to 145 kV
  • Meet all lEC and ANSI metering and protection classes, including special core classes TPS, TPX, TPV and TPZ ones
  • Rated primary Voltage up to 145 kV; rated primary current up to 5000A
  • Rated Secondary Voltages: 100 V, 100:1’3 V, 100:3 V, 110 V, 110:1’3 V, …
    Rated secondary current of 1A, 2A or 5A
  • Primary and/or secondary reconnection available. Rated short circuit withstand up to 200 kA peak
  • Suitable also for Une Oischarge use
  • Fully type tested according to international standards
  • The key oil impregnated paper insulation has been optimized after lang experience based an famous Heafely-Thrench original group
  • Special tests are also available to meet specific customer requirements.

Product Design:

  • Oil/paper internal insulation
  • External insulation with porcelain or composite insulator
  • External parts made of aluminum or stainless materials
  • CT core/windings located an the top of the equipment VT core/winding located an the bottom of the equipment
  • Bar-type primary conductor allows higher short circuit current and avoids large voltage drop across the primary winding
  • Available to withstand:
    • Effects of internal arc [according to IEC 61869 Standard]
    • Multichopped Test [according to IEC 61869 Standard]
    • Heavy seismic solicitations, according to IEC 62271, IEEE 693 and specific customers‘ requests [i.e. Chile ETG A.0.20]
  • Hermetically sealed. A suitable lnox steel bellows located an the top of the Combined Transformer allows the oil volume variation and keep the internal pressure equal to ambient one in every service conditions



Office No.-9, Plot 53/54, Sector-34, Space Heights, Near Tawa Hotel, Kamothe, Navi Mumbai - 410209, Maharashtra, India
Mr Piyush Lalchand Rathi (Partner)
Mobile :+919819614841, +919769207841
Mr. Dnyanesh Gawande (Partner)
Mobile :+919833686249