Monitoring Station RTU-Cu8
Insulation and loop resistance monitoring station with time domain reflectometer for fault location
The RTU-Cu8 monitoring station surveilles the insulation and loop resistance of copper cables in the LANCIER Monitoring UMS system.
The integrated multiplexer module allows for the monitoring of 8 measuring pairs with only one measuring device.
If the RTU-Cu8 detects faults on one of the measuring pairs, the optional TDR module is automatically switched on for fault location. In this way, the location of the fault is determined within a very short time and troubleshooting can be initiated immediately.
A free pair in the cable sections that is to be monitored serves as a measuring loop, which is continuously measured by the RTU-Cu8. The alarm threshold for insulation and loop resistance are freely programmable via an integrated keypad and the integrated display. All settings are saved in an internal EEPROM memory to prevent losses.
For remote alarming, the RTU-Cu8 has built-in dry contact outputs. In addition, it can be connected to a remote control system via Modbus.
The RTU-Cu8 quickly and precisely detects and locates cable breaks caused by construction activities, cable theft or sabotage, for example.
TDR is equipped with Color Touchscreen!
Ordering Data
Monitoring station RTU-Cu8 | Order-no. 076860.000 |
Monitoring station RTU-Cu8 plus | Order-no. 076861.000 |
| TDR-Module for retrofitting with time domain reflectometer measuring module for fault location with color touch screen | Order-no. 074714.001 |
Technical Data
| RTU-Cu8 | |
| Number of Measurement channels | 8 |
| Operating temperature | -20 .. +40 °C |
| Admissible ambient humidity | 0 .. 95 %, humidity, non-condensing |
| Dimensions (W x H x D) | 546 x 416 x 186 mm |
| Resistance measurement | |
| Insulation resistance Measurement range / Resolution | 0 .. 1 M / 0,001 MΩ, fault ± 5 % of measurement ±0,01 MΩ 1 .. 200 MΩ / 0,01 MΩ, fault ± 5 % of measurement ±0,01 MΩ |
| Loop resistance Measurement range / Resolution | 0 .. 10 kΩ / 0,001 kΩ, fault ± 5 % of measurement ±0,05 kΩ |
| Measuring voltage | 90 V DC |
| Signal LEDs | 2 x green / red: Alarm / Acknowledged alarm / Display operation insulation resp. loop 1 x blue: display operation |
| Signal outputs | 2 dry change-over contacts for: insulation and loop resistance Max. switchable voltage / current 100 V DC / 0.1 A DC |
| Fault location via TDR (optional) | |
| Measurement range | 62.5 .. 64,000 m |
| Location fault | 0.01 % .. 0.2 % of the measured value (12.5 cm to 8.0 m, depending on the subsections) |
| Impedance | 30 .. 500 Ω, adjustable |
| Impulse width | 10 ns .. 50 μs |
| V/2 | 50.0 .. 150.0 m/μs |
| Impulse amplitude | 10 V with matched load |
| Input sensitivity | 1 mV |
| Dynamic range | 80 dB |
| Signal output | dry change-over contact for: impedance Max. switchable voltage / current 100 V DC / 0.1 A DC |
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