Our range of outdoor oil cooled current transformers has the following specifications:
To step down line current to a value which is suitable for standard measuring instrument, relays etc.
To sense abnormalities in current and give current signals to protective relays to isolate the defective system. 11 kV to 33 kV Metering (0.2 to 3.0) Protection (5P - 10P)
Features:
- The transformers are oil filled in M.S. tanks & chambers together with suitable porcelain bushing.
- High quality C.R.G.O. silicon steel is used in the transformer.
- High quality crepe insulating paper is used to build up main insulation.
- Semiconducting shield is used to give linear distribution of electric stress along the length of the bushing.
- Filtered & de-aerated EHV grade oil is filled in current transformers while current transformer is under vacuum.
To seal it, the space left for expression on the top is filled with dry and pure nitrogen through non returnable valve at pre-determined pressure
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Type
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Live or Dead tank
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Operating Voltage
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11kV, 33kV
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Operating temperature
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-10°C to 40°C
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Conforms to
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IS - 2705.
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11kV, 33kV.
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Upto 2500 Amps.
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Secondary Current
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5a & 1A (Others on Request)
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Short time thermal current & its duration
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Upto 40kA for 1 second (Others on request)
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Rated burden
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5, 10, 15, 20, 30VA (Others on request)
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Accuracy Class
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0.2, 0.5, 1.0, 5P10, 5P15 (Others on request) (For differential protection, REF protection, Bus Bar protection, CT with Accuracy class PS can be offered.)
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Frequency
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50Hz
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