×
Follow Us
Results 1 to 2 of 2

Power Factor Testing

    #1
  1. Join Date
    Feb 2018
    Posts
    5
    Reputation

    Power Factor Testing

    What mode of operation of a power factor set is used for a C1 test?

    Correct Answer: UST

    What is a C1 Test?

  2. #2
  3. SecondGen's Avatar
    SecondGen is offline
    I push buttons.
    NETA Level III Pro Subscriber
    Join Date
    Jan 2014
    Location
    United States
    Posts
    326
    Reputation
    C1 test refers to power factor testing a condenser busing, specifically the main insulation.

    Bushings may be classified as being equipped, or not equipped, with a potential tap or power-factor test tap or electrode. “Potential” taps are sometimes also referred to as “capacitance” or “voltage” taps.

    Modern bushings rated above 69 kV are usually equipped with potential taps. Bushings rated 69 kV and below may also be equipped with power-factor taps. In the power-factor tap design, the ground layer of the bushing core is tapped and terminated in a miniature bushing on the main bushing mounting flange.

    The tap is connected to the grounded mounting flange by a screw cap on the miniature bushing housing. With the grounding cap removed, the tap terminal is available as a low-voltage terminal for a UST measurement on the main bushing insulation, C1 conductor to tapped layer.

    Click image for larger version. 

Name:	typical-condenser-bushing-design.png 
Views:	1 
Size:	37.3 KB 
ID:	297

    Click image for larger version. 

Name:	bushing-c1-test-diagram.png 
Views:	1 
Size:	43.8 KB 
ID:	298

    Read "Doble Test Procedures" Section 3. Bushings

Subscribe

Login or register to leave a reply!


Share this thread

Related Topics

  1. Replies: 9
    Last Post: August 16, 2018, 02:28 PM
  2. Transformer Oil Pressure when Power Factor Testing
    By ElectricalTestTech in forum Electrical Testing Talk
    Replies: 5
    Last Post: July 10, 2018, 07:43 PM
  3. Tan / Delta or Power Factor Testing of Dry Type Transformer
    By mask12900 in forum Electrical Testing Talk
    Replies: 1
    Last Post: January 1, 2018, 08:41 PM
  4. Power Factor for New Mineral Oil
    By Salcama in forum NETA Level 3 Exam
    Replies: 3
    Last Post: August 16, 2016, 01:11 PM


Related Content


Follow us


Explore TestGuy


NETA Certification Training


NICET Electrical Power Testing


Help and Support