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HV BM Split Modules HV BM Split Modules group

HV BM Split Modules

Measurement of internal conductor current and voltage as well as power analysis in confined spaces

The HV BM Split Modules use the proven technology of the HV Breakout Modules for fast and precise measurement of internal conductor current, voltage and power even in confined spaces. HV BM Split Modules can be used to perform measurements in HV power cables or also on busbars.

  • Measurement of voltage (U) and current (I) in HV applications with little space for the installation of the measurement technology
    • Nominal voltages up to ±1,000 V (measurement range up to ±2,000 V)
    • Currents up to ±1,000 A (nominal), ±2,000 A (peak)
    • 100% phase-synchronous acquisition of current and voltage
  • Simultaneous EtherCAT® and CAN bus communication or direct output of measured values via XCP-on-Ethernet
  • Output of voltage, current and instantaneous power with up to 1 MHz measurement data rate each
  • Optional output of RMS values of current and voltage as well as active power, reactive power, apparent power and power factor via CAN bus

The HV Split Modules are an part component of the Vector CSM E-Mobility Measurement System and serve as the basis for a wide range of measurement applications. They are used where there is not enough space for the installation of the HV Breakout Modules.

For flexible installation of the measurement technology in confined spaces, the HV BM Split modules consist of three components:

  • Measurement modules for current measurement
  • Measurement modules or cables for voltage tapping
  • Acquisition module for the collection of the data from the measurement modules

The sensor modules (HV SBM - HV Split Breakout Modules) are each connected to an input of the measurement module (HV SAM - HV Split Acquisition Module) using shielded, HV-safe sensor cables.

The "split" design allows the individual HV Split Breakout Modules and the HV Split Acquisition module to be installed where space is available.

Current measurement

Current measurement is performed via shunt modules consisting of a measurement shunt, temperature sensor for automatic temperature compensation and sensor electronics. The shunt-based measurement principle ensures avoidance of effects due to external fields (e.g. pseudo signals, characteristic shift or offset errors as well as phase shifts between U and I due to inductances and capacitances) and thus provides precise measurement results.

The shunt modules built into the current sensors are available with different measurement ranges and are selected to suit the measurement task.

The HV cables are connected to the sensor modules either via cable glands and ring terminals (HV SBM_I) or the PowerLok conecctor system (HV SBM_I C). In addition, the shunt module is also available as a encapsulated variant (HV SBM_I open) for connection via M8 bores, e.g. on busbars.

Voltage tapping

The HV voltage is tapped in the sensor module with connection via ring terminals (HV SBM_U) or PowerLok connector system (HV SBM_U C). Alternatively, a HV-safe sensor cable with open end can be used. The voltage is measured directly in the HV SAM measurement module.

Measurement module HV SAM (HV Split Acquisition Modul)

The HV SAM measurement module performs data acquisition, filtering, sensor supply, temperature compensation and online calculations. It has one signal socket each for the sensor cables of the HV Split Breakout Modules current and voltage. Data is transmitted via the EtherCAT® interface with up to 1 MHz data rate per measurement channel or via a CAN interface as averaged measured values.

In addition, the highly precise calculated RMS values of current and voltage as well as active power, apparent power, reactive power and power factor can be transmitted via CAN.

Measurement of current and voltage in HV cables
Measurement of current and voltage in HV cables in the confined space of a test vehicle.
Current measurement in a busbar
Current measurement in a busbar in a HV battery with HV SBM_I open and voltage tap via HV safe sensor cable.
Video HV BM Split Impressions
Video: HV BM Split Modules - Impressionen
Video HV BM Split TechSpecs
Video: HV BM Split Modules - TechSpecs


With the HV BM Split Modules, currents and voltages can be measured precisely and at high data rates even when there is too little space available for the installation of HV Breakout Modules. This means that measurements can also be carried out in tightly installed HV power cables of test vehicles or within HV components and in busbars. This also greatly simplifies the benchmarking of electric vehicles.

With the measurement data obtained from the HV BM Split modules and the eMobilityAnalyzer from the Vector CSM E-Mobility Measurement System a variety of analyses in real time can be performed: Inverter and powertrain efficiency calculations, e-motor power analysis, harmonic analysis, PWM analysis, ripple analysis and many more.

Video HV BM Split Aplication
Video: HV BM Split Modules - Application A


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