Method for identifying risks as a result of stray currents
First Claim
1. A method for identifying risks as a result of stray currents which flow to ground from a rail which returns traction current in a track with a DC power supply, comprising:
- measuring a voltage between the rail and the ground;
indicating a relatively increased risk as a result of stray currents upon the measured voltage indicating a discrepancy from a voltage reference value, wherein the voltage is measured at a plurality of measurement points along the track; and
transmitting the measurements to an evaluation center where they are evaluated centrally, wherein the reference value is ascertained for a new track and over a period with a known train sequence, and wherein the subsequent measurements are taken over a period of largely the same length with largely the same train sequence.
1 Assignment
0 Petitions
Accused Products
Abstract
A method is for identifying risks as a result of stray currents which flow to ground from a rail which returns a traction current in a track with a DC power supply. In accordance with a first embodiment, in which the voltage between the rail and ground is measured and an increased risk as a result of stray currents is indicated if there is a discrepancy from a voltage reference value, provision is made for the voltage to be measured at a plurality of measurement points along the track and for the measurements to be evaluated in an evaluation center. In accordance with a second embodiment, provision is made for activating a short-circuiter to connect a parallel path to the rail for returning the traction current. The current level in the parallel path is then measured and an increased risk as a result of stray currents is indicated if there is a discrepancy from a current-level reference value. Further, the method includes joint evaluation of a plurality of measurements which have been ascertained along the track.
8 Citations
33 Claims
-
1. A method for identifying risks as a result of stray currents which flow to ground from a rail which returns traction current in a track with a DC power supply, comprising:
-
measuring a voltage between the rail and the ground;
indicating a relatively increased risk as a result of stray currents upon the measured voltage indicating a discrepancy from a voltage reference value, wherein the voltage is measured at a plurality of measurement points along the track; and
transmitting the measurements to an evaluation center where they are evaluated centrally, whereinthe reference value is ascertained for a new track and over a period with a known train sequence, and wherein the subsequent measurements are taken over a period of largely the same length with largely the same train sequence. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method for identifying risks as a result of stray currents which flow to ground from a rail which returns the traction current in a track with a DC power supply, comprising:
-
activating a short-circulator to connect a parallel path to the rail for returning the traction current;
measuring a current level in the parallel path; and
indicating a relatively increased risk as a result of stray currents upon the measured current level indicating a discrepancy from a current-level reference value, wherein the reference value is ascertained for a new track and over a period with a known train sequence, and wherein the current level is measured over a period of largely the same length with largely the same train sequence. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A method, comprising:
-
measuring a voltage between a rail and the ground at a plurality of points;
transmitting the measurements; and
determining a risk of stray currents from the rail, upon the transmitted measurements indicating a measured voltage differing from a voltage reference value ascertained for a new track and over a period with a known train sequence, and wherein the measurements are taken over a period of largely the same length with largely the same train sequence. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. A method, comprising:
-
connecting a parallel path to a rail for returning traction current;
measuring a current level in the parallel path; and
determining a risk of stray currents from the rail upon the measured current level differing from a current-level reference value ascertained for a new track and over a period with a known train sequence, and wherein the current level is measured over a period of largely the same length with largely the same train sequence. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
-
Specification