The Polaris performs a continuous monitoring of parallel connecting cables in 2 x 25 kV railway systems, which typically carry the return current. If the connection of one of these cables deteriorates, it will be detected and selectively displayed. In addition, any undesired increase of the earth potential is detected and displayed. The above events are remotely reported to the control room. This enables the railway asset management to send the service team to the point of failure in a targeted manner.
| Measurement sensors | 0 - 630 A |
| tI>> response delay | 500 ms / 1,000 ms / 5 s / 10 s (adjustable) |
| Threshold inequality | 30, 40, 50, 60 % (adjustable) |
| Trip current earth potential | 50 V AC -2 V/+2 V |
| Accuracy | ±5 % |
| Amount of channels | 2 - 6 (adjustable) |
| Relay contacts | 2 relay contacts, momentary contact |
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