Deputy Electrical Project Manager Interview Questions and Answers

Tan delta is a measure of the dissipation factor in electrical insulation materials.

• Tan delta is the ratio of the resistive component to the reactive component of a material's impedance.

• It is used to assess the quality of insulation in electrical equipment.

• Lower tan delta values indicate better insulation performance.

• For example, a tan delta value of 0.001 means that only 0.1% of the energy is lost as heat.