High isolation transducers for voltage, current and speed signals in the railway industry

Precision Devices for the Rail Industry

The Knick Group has been a proven partner of the international railway industry for more than 50 years. With an exceptionally high MTBF of 2165 years (Mean Time Between Failures) in DC high-voltage transducers, which was determined based on real field data, Knick has set an industry benchmark. This quality standard is also pursued for all other products for the railway industry by the 230+ employees in the Berlin, Germany, Headquarters and in their international subsidiaries.

On this basis, Knick supplies pioneering measuring technology that increases cost-effectiveness and safety in rail transport – on track and in DC traction power supply. With devices for precise measurement of current and voltage as well as for isolated signal conversion for the railway sector, Knick impressively demonstrates "THE ART OF MEASURING”.

Rolling Stock

Substations

Wayside

Why Knick?
Signal conditioners and transmitters from Knick deliver the signals required for downstream processes – interference-free and with high precision at all times. The precise, robust devices from Knick meet the rail industry’s special standards-related and functional requirements. And to us, precision also means that each individual product property is perfectly tuned to the measurement task. After all, this is the prerequisite for the overall system being able to reliably carry out its function.

H2 [Ind] Application Description

Absatz [Ind] briefly: where can be used Knick products

In DC Substations

Voltage measurement
For 750 V, 1500 V and 3000 V DC systems, isolation of up to 3600 V AC/DC continuous, isolation test voltage of up to 15 kV AC

Current measurement
With shunt resistor from ±30 mV, isolation of up to 3600 V AC/DC continuous, isolation test voltage of up to 15 kV AC

Temperature measurement
With Pt100 resistance thermometer, isolation of up to 6600 V AC/DC continuous, isolation test voltage of up to 15 kV AC

On Rolling Stock

Voltage measurement
Up to ±4500 V DC / ±3000 V AC, isolation of up to 4800 V AC/DC continuous, isolation test voltage of up to 20 kV AC

Current measurement
With shunt resistor from ±30 mV, isolation of up to 4800 V AC/DC continuous, isolation test voltage of up to 18 kV AC

Speed signals
Speed signal doubling, adaptation and isolation, isolation of up to 1000 V AC/DC continuous, isolation test voltage of up to 5 kV AC

Railway Industry Brochure

Overview of railway-specific applications and product solutions

Related Applications

High voltage and current measurement on rolling stock

Knick offers highly isolating transducers for measuring voltage and current. P45000 is the high-voltage transducer with the smallest footprint and SIL 2. It is used for direct current measurement on board all trains driven with direct and alternating current.

Speed signal doubling and conversion on rolling stock

P16800 makes it easy to retrofit rolling stock with control systems through the safe (SIL2/SIL4) conversion of speed sensor signals for odometry systems.

Voltage and current measurement in DC substations

Substations for direct power supply up to the upper one-digit MW range and the grid segments they supply must be effectively secured against short-circuits. The protective mechanism must reliably interrupt high currents as quickly as possible and limit the power flowing into the short circuit.