It definitively proves out the integrity of the workmanship, cable insulation and its associated accessories such as splices and joints. A VLF AC withstand test is an excellent test method for insuring the cable laying
and workmanship of the new installation is good and will provide reliable,
long-term power distribution to the distribution grid the wind farm serves.
High Voltage, Inc. also can supplement VLF withstand testing with Tan delta
testing diagnostics via a Tan delta bridge used in conjunction with a VLF AC
Hipot. By monitoring the tan delta readings of a cable circuit over time,
one can determine if a particular cable is beginning to show insulation
degradation commonly caused by water trees possibly leading to a cable fault disrupting power delivery. By discovering a suspect cable before a
catastrophic cable fault, plans can be made ahead of time to repair,
rejuvenate or replace the cable and splices during a controlled repair
outage minimizing power interruption and service failure.
These two testing methods (VLF & Tan delta) are the easiest, most time
proven, simple, and conclusive for wind farm managers and HV contractors to enhance and continuously provide a reliable installation and reliable
generation of power. High Voltage, Inc. is very familiar with all cable
testing technologies, and knows cables.
31 County Rt. 7A, Copake, NY 12516
Web site: www.hvinc.com
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WALTER HEARN ASSOCIATES LLC
Design for Marketing
1099 Deerfield Dr. NW
Blacksburg, VA 24060