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Used unit in China

  • Tongrui Electric Transformer Oil Filtration

    Tongrui Electric Transformer Oil Filtration Machine Ultra High Voltage Turbine Oil Purifier

    • Manufacturer: Tongrui

    Vacuum Turbine Oil Hydraulic Oil Cleaning Equipment Oil Purification with Durable Centrifuge Applicable scope: It is widely suitable for online processing of steam turbine, the gas turbine, the hydraulic turbine'...

    $4,500 USD
    Chongqing, China
  • GFJDZ0987-35KV outdoor high voltage potential

    GFJDZ0987-35KV outdoor high voltage potential transformer

      This model GFJDZX0987-35 potential instrument transformers are cast in epoxy resin and fully enclosed. The units are suitable for electric systems of rated frequency of 50/60Hz and rated voltage of 36kV and below...

      Beijing, China
    • Voltage Transformer Spot Welding Machine

      Voltage Transformer Spot Welding Machine Fin Embossment

      • Manufacturer: EN-SOURCE

      I General Layout for Transformer Corrugation Fin Production Line (fin forming, fin seam&edges welding, reinforcing rod welding, spot welding, vertical bending and tank assembling) Build up of Transformer Corrugat...

      Zhejiang, China
    • Low Voltage Transformer Spot Welding

      Low Voltage Transformer Spot Welding Machine for Fin Embossment

      • Manufacturer: EN-SOURCE

      I General Layout for Transformer Corrugation Fin Production Line (fin forming, fin seam&edges welding, reinforcing rod welding, spot welding, vertical bending and tank assembling) Build up of Transformer Corrugat...

      Zhejiang, China
    • High Voltage Transformer Spot Welding

      High Voltage Transformer Spot Welding Machine Fin Embossment

      • Manufacturer: EN-SOURCE

      I General Layout for Transformer Corrugation Fin Production Line (fin forming, fin seam&edges welding, reinforcing rod welding, spot welding, vertical bending and tank assembling) Build up of Transformer Corrugat...

      Zhejiang, China
    • Low Voltage Transformer Corrugation Fin

      Low Voltage Transformer Corrugation Fin Production Line Fin Folding Auto Welding

      • Manufacturer: EN-SOURCE

      II General Layout for Transformer Corrugation Fin Production Line (fin forming, fin seam&edges welding, reinforcing rod welding, spot welding, vertical bending and tank assembling) Build up of Transformer Corruga...

      Zhejiang, China

    Overview

    Potential transformers (PTs), also called voltage transformers, step down high system voltages to standardized, isolated levels for metering and protection. They deliver accurate proportional voltage outputs for meters, protection relays and control circuits in substations, switchgear and industrial plants. PTs are available as oil-filled or dry types, single- or three-phase designs, and vary by accuracy class, burden and rated voltage—select based on system voltage, protection needs and environment.

    FAQ

    What should I check when buying a used potential transformer?

    Verify manufacturer, model, rated primary/secondary voltages, burden and accuracy class. Request nameplate data, insulation and ratio test records, oil test reports for oil-filled units, and any repair history to confirm suitability and condition.

    How do I ship a potential transformer safely?

    Use a carrier experienced with high-voltage equipment. De-energize and secure the unit, drain oil if required by regulations, protect bushings and tap changers, brace windings for transport, crate on proper skids, and insure the shipment.

    What maintenance should I plan for after purchase?

    Establish periodic visual inspections, insulation resistance and ratio tests, tighten connections, inspect bushings and seals, and perform oil sampling/DGA for oil-filled PTs. Follow manufacturer intervals and keep detailed test records.