BST-GFL31 User Manual
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Fig 2.8.1
2.8.2 Short-circuit Fault Location
Short-circuit fault is similar to ground fault location. Signal generator will inject a signal to the circuit and
use signal receiver to trace the current signal.
2.9 About
Distributed Capacitance
Distributed capacitance is very common phenomenon in DC systems. Generally there is big distributed
capacitance when circuit lines are long and wiring structure is complicated in electric circuit. Even if the
DC circuit is isolated to the ground, there could be return circuit when signal generator injects current
signal due to existence of distributed capacitance. Fig 2.9 is one example. C1 and C2 are distributed
capacitance before and after ground fault (R).
Fig 2.9
In ground fault location, grounding malfunction that we mention is for resistance grounding malfunction.
Grounding caused by distributed capacitance, which is objective fact, is not what we concern. But we
have to know its existence and affection.
Equivalent resistance of distributed capacitance is:
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