Locating a ground fault in a DC system
AssigneeSiemens Aktiengesellschaft
InventorsHubert Schierling, Benno Weis
Life of this patent
Estimating the term…
Abstract
A method is for locating a ground fault in a DC system to which a plurality of load zones can be connected. The method includes specifying a time window and, after the ground fault is detected, assigning the ground fault to a load zone which was connected to the DC system within the time window before the detection of the ground fault.
Claims20
A method for locating a ground fault in a DC system to which a plurality of load zones are connectable, the method comprising:
- defining a time window;
- and
- assigning, after detection of the ground fault, the ground fault to a load zone connected to the DC system, within the time window defined before detection of the ground fault, wherein
- upon the plurality of load zones being connected to the DC system within the time window defined before the detection of the ground fault, the ground fault is assigned to one of the plurality of load zones connected to the DC system relatively latest within the time window.
A DC system comprising:
- an evaluation unit, the evaluation unit configured to
- store data of a detection time for detection of a ground fault,
- define a time window and, for each respective instance of connecting a load zone of a plurality of load zones, a respective connecting time of the connecting the load zone and a respective connecting assignment of the respective connecting time to the load zone connected, and
- assign, after detection of the ground fault, the ground fault to the respective load zone based upon the stored data.
A DC system, comprising:
- main electrical lines;
- a ground fault monitoring unit connected to the main electrical lines;
- a plurality of connectable load zones;
- and
- for each respective load zone of the plurality of connectable load zones, a respective connecting unit assigned to each respective connectable load zone, each respective connectable load zone being connectable to the DC system by each respective connecting unit and each respective connecting unit being configured to
- store a definable time window, and
- determine, for each instance of connecting the respective connectable load zone, whether the connecting was affected within the definable time window before reporting of a ground fault by the ground fault monitoring unit.
A method for locating a ground fault in a DC system to which a plurality of load zones are connectable, the method comprising:
- defining a time window;
- and
- assigning, after detection of the ground fault, the ground fault to a load zone connected to the DC system, within the time window defined before detection of the ground fault;
- and
- storing, by an evaluation unit, a detection time of the detection of the ground fault, the time window and, for each instance of connecting a load zone, a connecting time of the connecting and a connecting assignment of the connecting time to the load zone connected, wherein
- the ground fault is assigned to the load zone based upon stored data.
Dependencies are inferred from the claim text.