HZ-B Cable Fault Location Instrument
I. Introduction
HZ-B cable fault location instrument is an important instrument during searching
for cable fault process. During the three-step of cable fault test "rough measurement→
searching for path → delicate location", you need to use cable fault location
instrument during the last two steps.
When you are in "searching for path", you need to add path signal to cable with
path instrument, and receive path signal with path gear in the cable fault location
instrument to determine the cable direction.
In "delicate location", you need to add cycling and repeated impact high-voltage to
cable fault phase with impact high-voltage equipment, and receive discharge signal
from fault point with the location gear of cable fault location instrument, to determine
the location of cable fault.
Cable fault location instrument uses a 3.8 inches 320
╳
240 dot matrix
high-resolution LCD screen design, which has abundant information display and
intuitive operation. Comparing with the old location instrument pointer, it has been
greatly improved. It Shows path signal waveform and fixed voice waveform
simultaneously on the LCD screen, and displays time difference between the two of
them. The closer from point of fault, the smaller the difference is, thus providing user
with a more intuitive location method.
When the old location instrument is performing delicate location, it’s unable to
re-confirm the cable path. High-voltage generator must be stopped and re-connect
"path instrument" to add path signal to the cable, which is so troublesome. HZ-B
cable fault location instrument has a determining the cable path approach when
performing delicate location.
