What are the dielectric strength standards for dry-type transformers?

What are the dielectric strength standards for dry-type transformers?

A dry-type transformer is a reliable electrical device and power equipment that has its own pressure and weight. For the dry-type transformer to operate safely and securely, its dielectric strength must be consistently ensured. The transformer must be able to withstand various pressures under different environmental conditions, which is essential for achieving safe and reliable operation.

The AC dielectric strength values for dry-type transformers are clearly defined by standards. Below are examples of commonly used dry-type transformers with their corresponding rated voltages and AC withstand voltage values:

10kV Oil-immersed Dry-type Transformer: AC withstand voltage is 28kV, while for the dry-type transformer, it is 24kV.

35kV Oil-immersed Dry-type Transformer: AC withstand voltage is 68kV, while for the dry-type transformer, it is 60kV.

110kV Oil-immersed Dry-type Transformer: AC withstand voltage is 160kV.

220kV Oil-immersed Dry-type Transformer: AC withstand voltage is 316kV.

500kV Oil-immersed Dry-type Transformer: AC withstand voltage is 544kV.

Neutral Point AC Dielectric Strength Values for Dry-type Transformers:

110kV Dry-type Transformer (non-directly grounded): AC withstand voltage is 76kV.

220kV Dry-type Transformer (non-directly grounded): AC withstand voltage is 160kV, while for directly grounded, it is 68kV.

500kV Dry-type Transformer (small impedance grounded): AC withstand voltage is 112kV, and for directly grounded, it is 68kV.

It is important to note that the dielectric strength values are independent of the number of turns in the transformer and are determined by the voltage level and insulation class.

For more detailed specifications or if you need further information, feel free to contact the transformer manufacturer. We are available to provide the necessary details at any time