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Buy Current Transformer

Date Posted :	2008-07-07
Valid until :	2008-07-13

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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.

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