A Hyundai-manufactured 132/33kV power transformer installed at a client’s substation, complete with external fire protection piping and auxiliary systems.

Key Components & Features:

• Manufacturer:
  Hyundai Heavy Industries Co., Ltd.

• Voltage Class:

  • Primary: 132kV

  • Secondary: 33kV
    Ideal for high-voltage to medium-voltage step-down, feeding distribution networks.

• Power Rating:
  Typically in the range of 20MVA to 60MVA, depending on the project scope (exact rating can be specified based on the project).

• Cooling System:

  • ONAN/ONAF (Oil Natural Air Natural / Oil Natural Air Forced)

  • Multiple radiator banks with forced air cooling fans for enhanced heat dissipation.

• Conservator Tank:

  • Cylindrical top-mounted conservator tank maintains the transformer’s oil level and pressure.

  • Includes silica gel breathers and oil level indicators.

• Buchholz Relay & Pressure Relief Devices:

  • Installed for internal fault detection and safety response.

  • Ensures system protection by sensing gas accumulation and overpressure.

• On Load Tap Changer (OLTC):

  • Allows automatic voltage regulation under load conditions to maintain voltage stability.

• Fire Protection System:

  • Overhead automated fire suppression piping network (sprinkler nozzles and detection lines) enveloping the transformer.

  • Installed to meet NFPA/IEC standards and client safety specifications.

  • Capable of rapid oil fire suppression in case of an incident.

• Control Panel & Protection Relays:

  • Transformer protection and monitoring through local control panels equipped with temperature gauges, trip relays, and alarm circuits.

Purpose of Installation:

This transformer is a critical asset for stepping down high-voltage electricity from the transmission grid to a distribution-friendly voltage level of 33kV. It serves as a vital part of the primary substation infrastructure, enabling safe and efficient power delivery to urban or industrial zones.