How to understand the Rating of this transformer

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SUMMARY

The transformer discussed has a rating of 7.5 kVA, with a primary voltage of 460 VAC and a secondary voltage of 230 L-L and 133 L-N. It features a Delta primary and Wye secondary winding structure, with a maximum continuous AC power rating of 7.5 kVA. The transformer can be tapped to provide 105.0%, 100.0%, or 95.0% of the primary nominal voltage, and has a percent impedance of 3.3% at 170°C. Its insulation class is rated at 220°C, indicating the maximum winding temperature in service, and it employs ambient air cooling, primarily used for isolation in electric motor applications.

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Electrical engineers, technicians working with transformers, and professionals involved in motor isolation applications will benefit from this discussion.

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Hello
How to know the rating of this transformer
 

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The name plate says 7.5 KVA. That is the rating.
 
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Hello
How the Winding is done in it what is the method
 
RITESHH KAKKAR said:
Hello
How the Winding is done in it what is the method
Delta primary, Wye secondary - It’s all there on the plate...
 
RITESHH KAKKAR said:
Hello
How to know the rating of this transformer

The Maximum continuous AC Power rating: 7.5kVA
Primary Voltage: 460VAC
Secondary Voltage: 230 L-L; 133 L-N
Can be tapped to provide either: 105.0%, 100.0%, or 95.0% of primary nominal voltage.
Winding Structure: Delta/G-Wye
Percent Impedance at 170 C (normal operating temperature): 3.3%
Insulation class: 220 (220 C will be the maximum winding temperature when in service. Hotter than that and something is wrong.)
Cooling Method: AA (Ambient Air)
Most likely usage: Isolation for an electric motor (hence the strange primary voltage and delta primary winding.)
 
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