• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

How Engineering Works

  • Home
  • MCQ
    • Electrical MCQ
    • Civil MCQ
    • Mechanical MCQ
  • Interview Questions
  • About Us
  • Privacy Policy
  • Disclaimer
  • Contact Us

What is meant by operating time of a protective relay?

February 22, 2018 by

DWQA Questions › Category: Switchgear and Protection › What is meant by operating time of a protective relay?
0 Vote Up Vote Down
admin Staff asked 6 years ago
1 Answers
0 Vote Up Vote Down
admin Staff answered 6 years ago

Answer: The operating time of a protective relay is defined as the time which elapses between the instant when the actuating quantity exceeds the pickup value to the instant when the relay contacts close.

It simply mean that if a fault occur and current exceeds the pickup value that time really contacts get closed. The relay took very small times to close the contacts. The time between relay sense the fault to relay contacts get closed is known as operating time of a protective relay.

Primary Sidebar

Related Questions

  • How does the resistance of a conductor change with a rise in temperature? asked by
  • What is through fault in power system? asked by admin
  • What happens when the capacitive reactance of a transmission line is very high? asked by admin
  • How does a capacitor correct a power factor? asked by admin

INTERVIEW QUESTIONS

MCQ or Objective


Recommended Post

MCQs on Basic Electrical

Ten important things about DC Motors

Top electrical engineering interview questions

MCQs on Special Motor

Electrical Engineering Interview Questions

Categories



Join Our Whatsapp Group


About Us | Privacy Policy | Disclaimer


Copyright@ Since-2017