Furnace Transformer
Any furnace that uses voltage other than standard commercial power needs a transformer. Whether for home or industrial furnaces, the transformer changes the voltage of the input power to a different voltage for use within the furnace.
Main features:
- Transformers are designed for induction furnace, arc furnace & submerged arc furnace application.
- Magnetic circuit - lamination CRGO M3 to M5 type
- Transformer dry type or oil cooled
- Electric circuit - electrolytic grade 99.9% pure copper with transposition in LV coil for current sharing in parallel conductors
- Dielectric circuits - electric grade press paper, boards and mineral oil
- Thermal circuit - adequate cooling ducts are provided radically & axially for the smooth flow of oil internally. Radiators cooling banks are provided for natural air cooling ONAN & additional fans for ONAF cooling. High current transformers are provided with OFW cooling
Specific features
- Designed for trouble-free performance during surges & frequent short circuits.
- MHigh current at low voltagese
- Transformer dry type or oil cooled
- High current at low voltages
- Optimum utilization of active materials for compactness
- Optimum utilization of active materials for compactness/li>
Specifications
- 3 phase, 50 Hz in voltages of 11 kV, 22kV, 33kV
- Off-circuit tap changer to provide ± 5 %,
- ± 7.5% & +5% to -10% taps in steps of 2.5%
- On load tap changer to provide +5% to -15% taps in steps of 1.25% as standard range and also custom built for any other ranges. OL.TC will be internally/externally mounted as per the requirement
- Class A, uniform/non-uniform insulated
- Vector group Dyn11, YNd11, DdOy11
- Continuous duty, double copper wound
- Painting as per IS/IEC standards
- Both HV & LV side outdoor bushings/ cable box/bus ducts/bus bar risers
- Standard fittings as per IS/IEC standards
Protective devices
- Buchholz relay with alarm and trip contact with shut off valves
- Oil temperature indicator with alarm and trip contact
- Winding temperature indicator with alarm and trip contact
- Magnetic oil level gauge with alarm contact
- Pressure relief valve with alarm and trip contact
- Marshalling box to house oil temperature indicator and winding temperature indicator
- Cooler units like oil to water heat exchanger pressure gauges, flow gauges, etc
- Neutral current transformer
Optional accessories
- Winding temperature indicator and oil tempera¬ture indicator with remote indication
- RTDs for winding temperature measurement
