Electrical Engineering XYZ MCQs
Which of the following transformer is used in sub station for operating a protective relay:
- Capacitor voltage transformer
- Distribution transformer
- Auto transformer
- All of the above
Correct answer: 1. Capacitor voltage transformer
Explanation: The correct answer is “Capacitor voltage transformer.”
In a substation, protective relays are crucial for detecting faults and abnormalities in the electrical system and initiating appropriate actions to isolate faulty parts and maintain system integrity. Protective relays often require a stable and accurate voltage reference to operate effectively.
Capacitor voltage transformers (CVTs), also known as capacitance potential transformers, are specifically designed to provide a highly accurate voltage signal for protective relay operation. They are connected across high voltage lines and provide a scaled-down voltage output that accurately reflects the voltage on the high-voltage lines.