of Three Phase Transformer 1 Contents Types of transformers Position of HV amp LV windings Core amp Yoke crosssectional area Importance of mitered joints Different types of transformers windings ID: 344833
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Design of Three Phase Transformer
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ContentsTypes of transformersPosition of HV & LV windingsCore & Yoke cross-sectional area
Importance of mitered joints
Different types of transformers windings
Different methods for cooling of transformers
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Types of transformersPower transformersDistribution transformersStep-up transformers
Step-down transformers
Core type transformers
Shell type transformersSingle phase transformers
Three phase transformers
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Position of HV & LV windings
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Core & Yoke cross-sectional area
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Importance of Mitred joints
The Iron loss and the no load current can be decreased if the flux lines are made to flow along the direction of the grain orientation. This is possible in mitred (bevelled) joints are used for cores and yoke as shown in figure.
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Different types of transformers windingsCylindrical windings
Helical windings
Double helical windings
Multi-layer helical windings
Cross-over windings
Disc & continuous disc windings
Aluminum windings
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Different methods for cooling of transformersMedium
=> Air
=> Gas
=> Synthetic oil
=> Mineral oil
=> Solid insulation
=> Water
Circulation
=> Natural
=> Forced
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Cooling method for DRY type x’mer1) Air natural (AN)2) Air Blast (AB)Cooling methods
for
Oil
immersed x’mer1) Oil Natural (ON)
2) Oil Natural Air Forced (ONAF)
3) Oil Natural Water Forced (ONWF)
4) Forced Circulation of Oil (OF)
i) Oil Forced Air Natural (OAFN)
ii) Oil Forced Air Forced (OFAF)
iii) Oil Forced Water Forced (OFWF)
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