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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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