What are the specifications and models of transformers?

The specifications and models of the transformer are represented by the following parameters: Rated capacity primary side rated voltage secondary side rated voltage winding connection group insulation level cooling method phase number transformation ratio

Transformer specifications and models

The specifications and models of the transformer are represented by the following parameters:

• Rated capacity (kVA/MVA):The apparent power that the transformer can continuously output under specified conditions.
• Primary rated voltage (kV): Rated operating voltage of the primary winding of the transformer.
• Secondary rated voltage (kV): The rated operating voltage of the secondary winding of the transformer.
• Winding connection group: The code of the transformer winding connection method, such as Yyn0, Dyn11, etc.
• Insulation level: The voltage resistance level of the transformer winding and insulation material, such as Class B, Class F, etc.
• Cooling method: Cooling method for transformer heat dissipation, such as ONAN, ONAF, etc.
• Number of phases: The number of phases of the transformer, the common ones are single-phase and three-phase.
• Transformation ratio: The ratio of the primary side voltage to the secondary side voltage of the transformer, indicating the voltage step-up or step-down multiple of the transformer.

Specification and model examples:

• 6300/400V, 500kVA, Yyn0, F, ONAN, three-phase

This specification model represents a unit with a capacity of 500kVA, a primary rated voltage of 6300V, a secondary rated voltage of 400V, the winding connection group is Yyn0, the insulation grade is F grade, the cooling method is ONAN, and the phase A number of three-phase transformers.

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