×
Follow Us
Results 1 to 1 of 1

VLF on 35kV cable won't start while one phase is connected to MV transfomer

    #1
  1. Join Date
    Feb 2021
    Posts
    2
    Reputation

    VLF on 35kV cable won't start while one phase is connected to MV transfomer

    While conducting MV cable acceptance testing at 44kV using an HVA60, it was found that the test would not start while one of the phases was connected to the MV transformer (B phase) with the transformer load break switch open.
    All cables did fine on DC insulation resistance and the transformer passed all acceptance testing. Still, until the B phase dead breaks were lifted from the transformer, the VLF would not start in this particular instance. This was just one of approximately sixty transformers on site, so it was very unusual. The cables tested fine (VLF) once they were un-landed.
    Has anyone experienced this?

Subscribe

Login or register to leave a reply!


Share this thread

Related Topics

  1. Looking to Get Hired? Start Here
    By testguy in forum Career Opportunities
    Replies: 0
    Last Post: August 2, 2019, 03:03 PM
  2. Start button on a motor control bucket
    By J2019L in forum NETA Level 3 Exam
    Replies: 1
    Last Post: April 1, 2019, 07:36 AM
  3. Limited Approach Boundary for 35kV switchgear
    By ssaniti in forum NETA Level 3 Exam
    Replies: 4
    Last Post: February 10, 2019, 04:50 PM
  4. When to start studying for NETA Level 3?
    By kenner14 in forum NETA Level 3 Exam
    Replies: 8
    Last Post: October 21, 2018, 12:11 PM


Related Content


Follow us


Explore TestGuy


NETA Certification Training


NICET Electrical Power Testing


Help and Support