It is also possible that one of the ground fault
devices, installed and functional at the time of construction, became defective at a later date.
Voltage variation indicating a single-phase to ground fault
The MME curve of the three-phase short-circuit fault (Figure 7) was similar to that of the single-phase ground fault
. The data matrix adopted the node voltage matrix, which can also be expressed as (4).
Hou, Review of Ground Fault
Protection Methods for Grounded, Ungrounded, and Compensated Distribution Systems, Schweitzer Engineering Laboratories, Inc., Pullman, WA USA, 2001.
Application of a scheme of insulation resistance continuous measurement in a 3-phase network for ground fault
location: M - ground fault
locator, TK - DC current clamp meter
Basically, the faults that occur in a network feeder are single line to ground fault
with resistance [R.sub.f], double line to line and line to ground faults
with arc resistance [R.sub.arc] and ground resistance [R.sub.f]-in different phases; that before presenting the fault detection algorithm, these two types of short circuit faults are modeled on the basis of figure 27.
The data base will be represented as follows: for phase A to ground fault
the frequency spectrum pertaining to such faults is shown in Figures 8 and 9.
For direct-driven wind turbine generators system, distribution network carrying an asymmetric ground fault
can cause its power output to reduce, which will lead its DC bus voltage to drop.
Double Phase to Ground Fault
with High Fault Resistance.
The influence of leakage (ground fault
) resistance and line loading were taken under consideration.
Zenith revealed the new ESP gauge Ground Fault
Immune at the European Artificial Lift Forum in Aberdeen, where a paper was presented on the results of a demonstration test.