Cognos Infra Interview Questions and Answers

Transformers are electrical devices that transfer electrical energy between two or more circuits through electromagnetic induction.

• Transformers are used to increase or decrease the voltage of an alternating current (AC) electrical supply.

• They consist of two or more coils of wire, known as windings, that are wound around a core made of magnetic material.

• The primary winding receives electrical energy from the input circu...read more

A transformer radiator is a cooling device used to dissipate heat generated by the transformer.

• Transformers generate heat during operation

• The radiator helps to cool down the transformer by dissipating the heat

• It is typically made of finned tubes or panels to increase the surface area for better heat dissipation

• The radiator is usually filled with oil or a coolant to enhance the cooling process

SF6 gas filling is the process of injecting sulfur hexafluoride gas into electrical equipment to enhance its insulation properties.

• SF6 gas is a colorless, odorless, and non-flammable gas.

• It is widely used in high-voltage electrical equipment such as circuit breakers, switchgear, and transformers.

• SF6 gas has excellent electrical insulation properties, allowing equipment to withstand high voltages.

• The gas filling process...read more