×
Follow Us
Page 2 of 2 FirstFirst 12
Results 11 to 18 of 18

What test set or method you are using for testing turns ratio on CCVTs?

 Jump to latest post
Page 2 of 2 FirstFirst 12
    #11
  1. wooddy is offline Junior Member
    Join Date
    Jan 2018
    Posts
    8
    Reputation

    ccvt testing

    Quote Originally Posted by NWILLJR1020 View Post
    We use a DOBLE M4000 power factor test set
    i use this method as well, to deal with the 57 to 63hz question, go to instument settings and change from automatic ramp up to manual ramp up, then use the arrow keys to bring the ccvt to 10kv, read voltage on the secondary, this will give u the ratio as well as be a stable setting at 60hz

  2. #12
  3. wooddy is offline Junior Member
    Join Date
    Jan 2018
    Posts
    8
    Reputation
    go into the insturment settings of the m4100 and change the ramp up from automatic to manual, then use the page up and page down keys to raise the voltage to 10kv on the top terminal of ccvt, read the voltage on the secondary, this will eliminate the machine from ranging from 57 to 63hz but rather give you stable readings at 60hz,

  4. #13
  5. Join Date
    Jun 2018
    Posts
    6
    Reputation
    Quote Originally Posted by Sanjayo View Post
    Most simple method I think is using a power factor test set as a power supply to the HV terminal and measure the secondary voltage.
    I use the power factor test set. Read the ratio off the secondaries.

  6. #14
  7. Join Date
    Jun 2015
    Posts
    25
    Reputation
    Quote Originally Posted by wooddy View Post
    go into the insturment settings of the m4100 and change the ramp up from automatic to manual, then use the page up and page down keys to raise the voltage to 10kv on the top terminal of ccvt, read the voltage on the secondary, this will eliminate the machine from ranging from 57 to 63hz but rather give you stable readings at 60hz,
    Very helpful. Thank you for the info.

  8. #15
  9. Join Date
    Aug 2018
    Posts
    7
    Reputation
    Quote Originally Posted by scottxclark View Post
    Can any of you tell me what test set or method you are using for testing turns ratio on CCVTs? Are you guys applying a high voltage to the high voltage terminal, and measuring the secondary, or are you using a test set? My understanding is a standard TTR test set will record too high of an error due to the voltage decay in the capacitor stack. Vanguard's CTV-765 seems like a simple and fast test set. Any feedback is appreciated. Thanks!
    I believe Omicron makes a special test set for this. I have used their CPC-600 (not sure I remember correct number) to test these also. You could also probably use a variac although it depends on the ratio if you can get a high enough voltage to measure secondary.

  10. #16
  11. Join Date
    Jul 2017
    Posts
    1
    Reputation
    Quote Originally Posted by Chipperk View Post
    I use the power factor test set. Read the ratio off the secondaries.
    same here

  12. #17
  13. Join Date
    Nov 2019
    Posts
    1
    Reputation

    Use cpc100

    Quote Originally Posted by scottxclark View Post
    Can any of you tell me what test set or method you are using for testing turns ratio on CCVTs? Are you guys applying a high voltage to the high voltage terminal, and measuring the secondary, or are you using a test set? My understanding is a standard TTR test set will record too high of an error due to the voltage decay in the capacitor stack. Vanguard's CTV-765 seems like a simple and fast test set. Any feedback is appreciated. Thanks!
    Use CPC100

  14. #18
  15. Join Date
    Aug 2015
    Posts
    14
    Reputation
    Quote Originally Posted by trn8ochaser View Post
    I personally use an M4100 to apply 10kV to the top and measuring at the bottom with a voltmeter. However, this will either be at 57 or 63 Hz, which I've recently been concerned about effecting the accuracy.
    Great that you are performing a voltage ratio tests as a TTR will not provide the results.

    Have never seen where line frequency modulation mode will affect the voltage. You can change the test mode to line sync reversal and the frequency will remain at 60 hz.

    The line frequency modulation test mode was a great idea to eliminate electro-static interference from the overhead power lines in a sub.

Page 2 of 2 FirstFirst 12
Subscribe

Share this thread

Related Topics

  1. What is the turns ratio?
    By franko26 in forum NETA Level 2 Exam
    Replies: 23
    Last Post: February 14, 2022, 10:36 AM
  2. What is the proper formula for 3 phase turns ratio?
    By Js20981 in forum Electrical Testing Talk
    Replies: 2
    Last Post: September 5, 2020, 07:20 PM
  3. Dry Tranformer Turns Ratio
    By shamimkhan in forum Electrical Testing Talk
    Replies: 2
    Last Post: January 18, 2018, 10:22 AM

Tags for this Thread

Follow us


Explore TestGuy


NETA Certification Training


NICET Electrical Power Testing


Help and Support




You are viewing the archives. Enjoy new features and join the conversation at wiki.testguy.net