- Sensors
- Temperature monitor TW 50/60
- Temperature monitor TW 03 S – Type 8432
- Electronic temperature monitor – Type 8433
- PT100 thermo sensor – Type 8433
- Electronic thermostat – Type 8434
- PT100 thermosensor – Type 8434
- Electronic thermostat in cable form – Type 8434
- PT100 thermosensor 2-wire and 3-wire cable connection – Type 8434
- Non-contact magnetic switch – Type 8441
- Current sensor – Type 8442
- Non-contact overhead wire contact TLC 4 – Type 8474
- Precipitation sensor – Type 8921
- Precipitation sensor – Type 8921
- Potential monitoring/-protection
- Mobile adjustment and test device – Type 8204
- Potential monitoring devices
- Display unit – Type 8540
- Voltage Monitors
- Voltage Signal Relays
- Potential Protection Devices
- for floating grounds with voltage monitoring – Type 8900
- for floating grounds with voltage monitoring – Type 8900
- for floating grounds with current control – Type 8901
- with low voltage limiter, surge arrester current monitoring and remote clearing function – Type 8901
- with SIEMENS low voltage limiter and surge arrester – Type 8901
- for open earthing with current monitoring and remote clearing – Type 8901
- for floating grounds with current control and LED indicator – Type 8901
- Voltage fuse – Type 8961
- Voltage Limiting Device – Type 8962
- Over Voltage Protector Type PSNP – Type 8963
- R/C combination – Type 8970
- Earthing device – Type 8971
- Special relays
- Switching amplifier
- Temperature monitoring – Type 8435-PT100
- Evaluation unit – Type KAG2
- Evaluation unit – Type 8480
- Evaluation unit – Type KAV1
- Switching amplifier – Type 8582
- Switching amplifier – Type 8582DCW
- Isolating switching amplifier – Type 8583
- Switching amplifier – Type 8586
- Mobile Test Device for non-contact overhead contact line switch
- Cable Monitoring Devices
- Points Heating Systems
- Current Monitoring/-supply
- Cabinets
- Accessories
- Individual Solutions
Description
Cable monitoring devices can be as standard or with additional monitoring of the cable shield for breaks. Here we make use of a trick in that the measuring resistances lying parallel to the insulation section to be monitored are not built into the cable monitoring device but instead one of them is installed at the end of the cable to be monitored. In this way the measuring current flows through the cable shield and a break in the shield leads to a break in the measured current and can be evaluated accordingly.
Since the cables do not as a rule terminate in the switching cell, this often results in the question as to how these resistors can be installed suitably? Shrinking on the terminating resistor within the sleeve at the end of the cable is to reject because of problems of accessibility.
Working in collaboration with various railway operators, we therefore came up with three basic solutions for this problem: Installation of the terminating resistor in a housing that has a snap-type socket for mounting on the carrying rail. The resistor itself is encapsulated for protection against external influences. A further version was produced in the form of a housing for attachment to flat surfaces, housing walls, etc. A third alternative provides the same encapsulated module in a weatherproof housing with metric screw connection. Today there are the following corresponding versions of the solutions:
There are two versions with the same housing dimensions. This housing with a built-in resistance of 68 kOhm, 17 W, type 85319 x is available to monitor the cable shielding for breaks and to display this breakage as an »internal short circuit«.
The type 85329 x configuration takes into account the options of switching a terminating resistance of 1120 kOhm between the conductor and the shield. This version likewise offers the option to monitor the shield for breaks. In this case an shield break leads to a »Earth short circuit« display.
A stainless steel installation plate is also available to install this terminating resistor in a weatherproof housing (version type 853 x 98). This plate can be used either for attachment with M6 or M8 threaded bolts or else with strip-type fastening.
See the complete brochure folder for additional information and accessories.
Do you have any questions?
We will be happy to answer you!