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High-Voltage Safe Measurement Systems High-Voltage Safe Measurement Systems

HV Breakout Modules

Direct measurement of current, voltage and power

The HV Breakout Modules (BM) have been specifically designed for safe measurement applications on cables carrying high voltage. Current and voltage are evaluated and the power calculated online in the module.

The voltage is measured directly. Current measurement is performed by a shunt module that includes a differential amplifier, a temperature sensor and a memory chip for calibration data for automatic online temperature compensation.

The HV BM outputs the measured data with a maximum data rate of up to 1 MHz via EtherCAT® interface and simultaneously with a data rate of up to 10 kHz via the additional CAN interface. This allows a high speed data acquisition via Ethernet and at the same time data recording via CAN data logger.

The HV BM is to be inserted into the HV power cables by feeding the cables through PG cable glands into the module and connecting them there. By measuring directly in the module, possible interferences are minimized and the precision of the measurement is increased.


  • Measurement of voltage (U) and current (I) in HV applications
    • Voltages up to ±1,000 V (measurement range up to ±2,000 V)
    • Currents up to ±800 A (rated), ±1,400 A (peak)
    • Shield currents up to ±250 A (rated), ±500 A (peak)
  • Online power calculation with 1 MHz data rate calculation, 100 % synchronous
  • Simultaneous EtherCAT® and CAN bus communication
  • Output of voltage, current and power with up to 1 MHz measurement data rate

Module overview

Designation Phases Measurement of
Current Voltage Power Shield Current
HV BM 1.1 1
HV BM 1.2 1
HV BM 3.1 3
HV BM 1.2 /S 1
HV BM 1.2 +S 1
HV Breakout-Modul Typ 1.1
HV Breakout-Modul Typ 1.1

HV BM 1.1 | 1.2

  • Single-phase measurement of current, voltage and power
  • Shunt module options with different measurement ranges. The shunt modules are selected seperately and are permanently installed
  • Cables connected via ring terminals
  • HV BM 1.1 - Measurement on a single high-voltage cable
  • HV BM 1.2 - Measurement on separate cables for HV+ and HV-

HV BM 3.1

  • Three-phase evaluation of current, power and voltage
  • Currents up to ±32 A
  • Cables connected via Phoenix connector
  • Measurement categories:
    • CAT 0: 1,000 V
    • CAT II: 600 V
    • CAT III: 300 V

HV BM 1.2 /S

  • Measurement of shield currents in high-voltage power cables
  • Braided shield connected via ring terminals

HV BM 1.2 +S

  • Single-phase measurement of current, voltage and power on separate cables for HV+ and HV-
  • Measurement of shield currents
  • Cables and braided shield connected via ring terminals
HV Breakout Module Type 1.2
HV Breakout Module Type 1.2
HV Breakout Module Type 3.1
HV Breakout Module Type 3.1
HV Breakout Module Typ 1.2 +S
HV Breakout Module Typ 1.2 +S


Designation Phases Max. measurement ranges Max. measurement data rates
Nominal voltage Peak voltage Rated current Peak current ECAT CAN
HV BM 1.1 1 ±1,000 V ±2,000 V ±250 A* ±500 A 1,000 kHz 10 kHz
HV BM 1.2 1 ±1,000 V ±2,000 V ±800 A* ±1,400 A 1,000 kHz 10 kHz
HV BM 3.1 3 ±1,000 V ±1,000 V ±32 A ±50 A 500 kHz 5 kHz
HV BM 1.2 /S 1 n.a. n.a. ±250 A Shield current* ±500 A Shield current 1.000 kHz 10 kHz
HV BM 1.2 +S 1 ±1.000 ±2.000 ±800 A*
±250 A Shield current*
±1.400 A
±500 A Shield current
1.000 kHz 10 kHz

* Maximum size of the shunt modules. Further possible measurement ranges can be found in the respective data sheet.


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  • Configuration software for CSM measurement modules (incl. documentation)
  • with visualization software CSMview
  • System requirements:

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