Transformers

VII.C: 110kV Current transformer
Standard: IEC – 60044 – 1;
Technical parameters:
  Single phase, outdoor type.
  Rated voltage: 123 kV
  Rated frequency: 50Hz
Short - time withstand current: 25kA/3s
Making current: 63kA.
Ratio: 200-400-600-800/1A.
  Number of secondary windings: 4
Accuracy & burden:
  Core 1: 0.5-30 VA (for measurement)
    Core 2, 3: 0.5-30 VA (for Protection)
  Core 4: 5P20 - 30 VA (for busbar protection)

Insulation:
  Oil immersed
  Rated lightning impulse-withstand voltage: 550kV
  Rated power frequency-withstand voltage:
- Primary: 230kV
- Secondary: 3kV
  Limits of temperature rise of windings: 60 oC
  Limits of temperature rise of oil: 55 oC
  Minimum creepage distance: 25mm/kV

Accessories:
  + Oil level indicator.
  + Oil valve for draining.
+ Zinc galvanized Supporting structure, bidder must provide shop drawing for manufacturing the steel structure.
+ Terminal for conductor 185 mm2, earthing terminal
  + Document for installation, operation, maintenance, and test report.

Special note: Bidder provides following document for bid evaluation.
- Type test certificate (as per IEC 60044-1).
- List of clients.
- Operating certificate of clients.