Skip to main content

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

Sector 4

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

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.
P16800 makes it easy to retrofit rolling stock with control systems through the safe (SIL2/SIL4) conversion of speed sensor signals for odometry systems.
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.
In dual-mode locomotives, application-specific, adapted P45000 are used as isolation barriers

Have a question? We are here to help.
Contact Us

Matching Products

Latest blog articles from the interface technology area

Stack and String Voltage Measurement in Electrolyzers and Fuel Cells

Voltage, current and temperature measurement in electrolyzers with P40000 series high voltage transducers

New 30 mV Shunt Resistors for Knick Transducers

Knick is expanding the accessory range for its high-voltage transducers with immediate effect by adding shunt resistors with a 30 mV voltage drop
Innovations at InnoTrans 2024

Innovations at InnoTrans 2024 for rolling stock and DC traction power supply

At InnoTrans 2024 Knick presents electrical measurement solutions for rolling stock and DC traction power supply applications

Knick Austria - direct customer contact in Austria from 2024

Reorganization of sales in Austria and new contacts in the field of process analytics and interface technology

Energy storage - the handshake between renewable energy and electric vehicles

Energy storage technology such as battery and hydrogen are critical for growth and continuous development of renewable energy and e-mobility.

P52000VPD voltage presence detector reliably detects voltages up to 4200 V DC

The new P52000VPD voltage presence detector reliably monitors areas with high voltages and sends a signal to the downstream plant control system when a specified threshold value is reached.

Knick Interface at Battery and Electric & Hybrid Vehicle Technology Expo

Knick will be showcasing high-voltage electrical measurement and signal conversion products.

Quadruple Standard Signals in Just One Signal Conditioner

The A20340 can output a standard input signal to four calibrated and galvanically isolated outputs in parallel.

Electrical measurement and process analytics for hydrogen production

Knick products optimize hydrogen production in the process and in electrolyser operation.

Condition Monitoring of High-Voltage Motors

Having an active predictive maintenance campaign in place for large rotating equipment can be a key strategy for maximizing process uptime.

Pulse frequency conditioner for speed sensors

The new P16000 from Knick is a pulse frequency conditioner that converts frequency signals from speed sensors into standard signals.

Worldwide smallest transducer up to ±2200 V

The P40000 series from Knick enables reliable voltage measurements from ±50 mV to ±3600 V and current measurements from ±100 mA to ±20 kA.

Importance of broad-range power supplies for DC electrical measurement

Many DC electrical measurement products manufactured by Knick contain universal, also known as broad-range, power supplies.

Measuring Photovoltaic Degradation

Photovoltaic (PV) array degradation is an important aspect to consider for system design and installation.

Electrical Measurement Solutions: Control from 480 to 4800 Volts

Voltage and current transducers from Knick bring true control to electrical measurement applications across a wide-range of industries.

Benefits of High Voltage Transducers versus Instrument Transformers

When a need arises to step voltage in a circuit either up or down for purposes of power transmission or distribution, there is no doubt that transformers are essential.

Shunt Resistor versus Hall Effect Technology

There are many systems where measurement of large DC currents are needed for performance and safety.

MTBF beyond 3000 years: A snap hook for your plant

Failure of equipment on the plant floor can lead to considerable and costly disruption.

Knick Products Comply With UL - What Does That Mean?

There are different assessments and approaches to reach an adequate level of safety. Manufacturers are typically on the “safe” side, if they comply with recognized standards.

High-voltage transducer offers more safety on railway vehicles

The requirements placed on railway vehicles have increased significantly in recent years. Products for rolling stock need to ensure a higher level of functional safety than ever before.

True RMS Measurement with P41000TRMS

Traditional millivolt AC transducers are very susceptible to errors due to their poor insulation and are only designed for pure sinewave measurement.

Functional safety and maximum availability can go together

The requirements on operational and safety-related circuits are continuously growing.