BST-GFL31 User Manual
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2.4.4 Return Circuit for Fault Location
After the above signal injection from signal generator, there will be return circuit like the exemplified
diagram below.
Supposed that the fault is on positive busbar on the point called “Fault 1”, the current signal injected from
BST-GFL31 signal generator will go all the way to the point “Fault 1”, outflow to the ground, finally goes
back the signal generator via the testing lead and thus form a return circuit.
This return circuit is important for signal tracing using a signal receiver. And this is the working principle
for BST-GFL31 Ground Fault Locator.
For detailed explanation of the theory on signal tracing, please refer to Sections from 2.5 to 2.7.
Fig 2.4.4 Example of current flow
2.5 Signal Tracing with Signal Receiver
After the above setting and measurement on signal generator, you could leave the generator alone as
long as there is enough power. Otherwise, connect the AC power adapter during operation. Then the
signal receiver will take charge of the rest work for signal tracing.
Note:
Use the signal receiver for signal tracing ONLY after the signal generator is in the last screen like
below (after signal adjustment and with “continued“ signal)
Fig 2.5
2.5.1 Frequency Synchronization
Before we start signal tracing, make sure that frequencies of signal generator and receiver are identical.
In factory default setting, both signal generator and receiver have frequency of 10Hz. In this case, you
do not need to change frequency or set frequency synchronization. Then please skip to Section 2.5.2
below.
If your signal generator has a different output frequency, please refer to “3.2.3.1 Frequency
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