×
Follow Us
Results 1 to 3 of 3

Vacuum Contact in CB

    #1
  1. mmacdonell is offline Junior Member Pro Subscriber
    Join Date
    May 2019
    Posts
    3
    Reputation

    Vacuum Contact in CB

    9. Which of the following is not a type of contactor used in circuit breakers?
    Your Answer: Electro-pneumatic
    Correct Answer: Vacuum

    How is Vacuum not a type of contactor used in CB's?

  2. #2
  3. Join Date
    Jun 2017
    Posts
    11
    Reputation
    Quote Originally Posted by mmacdonell View Post
    9. Which of the following is not a type of contactor used in circuit breakers?
    Your Answer: Electro-pneumatic
    Correct Answer: Vacuum

    How is Vacuum not a type of contactor used in CB's?
    I agree Vacuum contactor is a thing, but maybe they are using vacuum in the sense that you cannot DLRO across a vacuum. If so the question and answers are badly worded.

  4. #3
  5. Join Date
    Nov 2019
    Posts
    9
    Reputation
    Quote Originally Posted by mmacdonell View Post
    9. Which of the following is not a type of contactor used in circuit breakers?
    Your Answer: Electro-pneumatic
    Correct Answer: Vacuum

    How is Vacuum not a type of contactor used in CB's?
    Isn't a contactor a device that is controlled by another voltage, like what you see in a motor starter? I didn't think circuit breakers had "contactors" except maybe in the control circuit.

Subscribe

Login or register to leave a reply!


Share this thread

Related Topics

  1. Transformer power factor under vacuum
    By SecondGen in forum Electrical Testing Talk
    Replies: 13
    Last Post: August 5, 2019, 02:38 PM
  2. VCB Contact Timing Test (11KV)
    By shamimkhan in forum Electrical Testing Talk
    Replies: 2
    Last Post: January 2, 2019, 08:36 PM
  3. Vacuum Circuit Breaker
    By shamimkhan in forum Electrical Testing Talk
    Replies: 1
    Last Post: December 8, 2017, 10:42 AM
  4. VCB Contact Resistance
    By shamimkhan in forum Electrical Testing Talk
    Replies: 1
    Last Post: December 8, 2017, 10:36 AM
  5. Trip contact operation after relay testing
    By DetroitLions in forum NETA Level 3 Exam
    Replies: 0
    Last Post: January 30, 2016, 09:16 PM


Related Content


Follow us


Explore TestGuy


NETA Certification Training


NICET Electrical Power Testing


Help and Support