Voltage, current, and temperature measurement for DC power supply

Knick has supplied galvanically isolated transducers for the reliable and precise measurement of the voltage and current in direct current stations for decades. During that time, the company has developed into the world’s market leading in this segment. This is why Knick is the first contact for suppliers to and operators of direct current stations when it comes to mastering special technical challenges: for example, options for monitoring wear to enable predictive maintenance.

Why Knick?
Protective devices in substations must measure current and voltage in order to execute algorithms for short-circuit detection. This requires high-voltage transducers that measure quickly and precisely, and can withstand high loads at the same time. They must keep voltages between 750 and 3000 V DC under control, including temporary surges like those in energy recovery for braking trains, for example. In these high-voltage applications, protection for humans and devices is crucial. Therefore, the strong galvanic isolation of Knick devices is an important factor when choosing a transducer.

Matching Products

P41000 High Voltage Transducer | Input up to ±100 V | High isolation up to 3600 V

Product number:

P41000

P41000AG High Voltage Transducer | Input up to ±120/1320 mV | Nominal current and overcurrent measurement

Product number:

P41000AG

P42000 High Voltage Transducer | Calibrated range selection

Product number:

P42000

P52000 VPD High Voltage Transducer | Input max. 4200 V DC or AC peak | Voltage presence detection

Product number:

P52000VPD

P44000 Temperature Transmitter | Input Pt100 resistance thermometer (RTD) | High isolation up to 6600V

Product number:

P44000

P29000 High Voltage Transducer | Calibrated range selection

Product number:

P29000

Associated Industries and 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.

Railway

Electrical measurement in DC traction power substations and on rolling stock; conversion and duplication of speed sensor signals on-board rail vehicles.

Railway industry brochure

Overview of railway-specific applications and product solutions

Latest blog post

Sept 2024

Interface Technology

Hydrogen

Stack and String Voltage Measurement in Electrolyzers and Fuel Cells

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

Sept 2024

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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

Sept 2024

Interface Technology

Exhibition, InnoTrans

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

Dec 2023

Company

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Interface Technology

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Process Analytics

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

May 2022

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Energy

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.

Feb 2022

Interface Technology

P52000VPD, Voltage

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.

Sept 2021

Interface Technology

USA, Exhibition

Knick Interface at Battery and Electric & Hybrid Vehicle Technology Expo

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

May 2021

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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.

Apr 2021

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Hydrogen

Electrical measurement and process analytics for hydrogen production

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

Mar 2021

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High-Voltage Transducer, USA, P44000

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.

Mar 2021

Interface Technology

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.

Nov 2020

Interface Technology

High-Voltage Transducer, Voltage, P42000D2

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.

Aug 2020

Interface Technology

DC

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.

Jul 2020

Interface Technology

High-Voltage Transducer, DC, P29000

Measuring Photovoltaic Degradation

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

Jun 2020

Interface Technology

High-Voltage Transducer, USA

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.

Jun 2020

Interface Technology

High-Voltage Transducer

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.

Nov 2019

Interface Technology

DC, USA, Current

Shunt Resistor versus Hall Effect Technology

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

Mar 2018

Interface Technology

MTBF beyond 3000 years: A snap hook for your plant

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

Jan 2018

Interface Technology

UL

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.

Nov 2017

Interface Technology

High-Voltage Transducer, P50000

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.

Feb 2017

Interface Technology

P41000TRMS