11kV to 33kV PT Dry Type

11kV to 33kV Potential Transformer/Voltage Transformer

(Resin Cast/Dry Type Indoor)

National Electricals is one of the leading manufacturers of 11kV to 33kV resin cast dry type Potential transformer/Voltage transformer for indoor installation. Our product is being manufactured using industrial best practices/processes and are 100% tested before final dispatch as per NABL guidelines in our state of the art fully equipped lab under the supervision of experiences and well qualified engineers. Our product is fully type tested as per latest standards from government/NABL approved laboratories like ERDA/CPRI.


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Our product confirms to following standards and latest amendments, All products are confirming to following standards:-

  • Specification

    • IS 3156: 1992
    • IS 5561

  • Title

    • Specification for Voltage Transformers/Potential Transformers
    • Specification for Terminal Connector

Features:

 

  • Primary and Secondary Winding: Coated Super Enamelled round copper wire from reputed manufacturer like BIC, Atlas etc confirming to latest IS Standards is used.
  • Insulation: High quality epoxy resin is used. Casting is done under vacuum in automated best in market epoxy resin cast plant.
  • Core: Nano type, CRGO, HPDR, MOH, M-4, M-3 or ZDKH toroidal core is used for CT depending on customer’s requirement. High Quality core is used in PT.
  • Testing: Each unit undergoes all routine tests in our state of the art lab, by our well experienced and well qualified engineers before dispatch.

  • General Particulars

    • Highest System Voltage( H.S.V.)
    • Power frequency dry/ wet withstand voltage on the primary winding for one minute
    • Lightning Impulse withstand Voltage

  • 11KV

    • 12 KV (r.m.s.)
    • 28 KV (r.m.s.)

     

    • 75 KV (r.m.s.)

  • 33KV

    • 36 KV (r.m.s.)
    • 70 KV (r.m.s.)

     

    • 170 KV (r.m.s.)

  • Specific Particulars

    • Number pf Phases
    • Rated Transformation Voltage Ratio
    • Number of Secondary Windings
    • Output Burden
    • Accuracy Class
    • Voltage Factor

    • 3 or 1 unearthed or earthed & 1 earthed
    • As per customer requirement
    • Upto 3 or As per customer requirement
    • Upto 100VA( As per customer requirement)
    • For Metering: 2,0.2s 0.5,0.5s 1.0 & 3.0. For Protection: 3P,6P For 3 Phase RVT: 5PR, 10PR,15PR
    • 1.2 Continuous & 1.5 for 30 Sec or 1.9 for 30 Sec or 1.9 for 8 hours