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HV Breakout Module 1.2+U HV Breakout-Module 1.2+U

HV Breakout Module 1.2+U

Single-phase measurement of 3 × voltage and current in HV applications

The HV Breakout Module (BM) type 1.2+U is specially designed for single-phase measurements on HV voltage power cables. HV BM 1.2 are suited for simultaneous measurement of internal conductor current and voltage. With HV BM 1.2+U in addition the voltages of HV+ to ground (PA) and HV- to ground are measured.


  • Single-phase measurement of 3 × voltages (U) and current (I) in HV applications
    • Internal conductor current up to ±1,000 A (rated), ±2,000 A (peak)
    • Voltages up to ±1,000 V (measurement range up to ±2,000 V)

  • Simultaneous EtherCAT® and CAN bus communication
  • Output of voltages and current with up to 1 MHz measurement data rate per channel

  • Optional calculation of power and RMS values directly in the module and output via CAN
HV Breakout-Modul Typ 1.2+U
HV Breakout Module Type 1.2+U


The HV BM 1.2+U is installed into the HV cables by feeding the cables through cable glands into the interior of the module and connecting them with ring terminals.

The measurement of three voltages (HV+ → HV-; HV+ → ground; HV- → ground) and current with just one measurement module offers enormous advantages in terms of space requirements and time needed for instrumentation. The necessary measurements can be carried out with just one module instead of several measurement devices that would have to be used otherwise to get all data.

The three voltages are measured directly by the HV BM 1.2+U. The current measurement is performed with an integrated shunt module, which includes a temperature sensor and a memory chip for the calibration data for automatic online temperature compensation.

The HV BM 1.2+U outputs the measurement data at a maximum data rate of up to 1 MHz per channel via the EtherCAT® interface and simultaneously at a data rate of up to 10 kHz per channel via the additional CAN interface. This enables fast data acquisition via Ethernet and simultaneous data recording with a data logger via CAN.

Calculation of power and RMS values

With the option Calc. active, apparent and reactive power, power factor as well as the RMS values for current and voltage can be calculated directly in the module from the sampled measured values. The calculated values are directly transmitted via CAN to the measurement computer or data logger.

Technical Data

HV Breakout Module Type 1.2+U
Inputs Separate HV power cables for HV+ and HV-
Number of measured phases 1
Number of cable glands 2
per side
Cable outer diameter 9 mm to 25 mm
Select suitable cable glands. See datasheet.
Measurement signals Voltages HV+ → HV-; HV+ → PA; HV- → PA and current
Inner conductor current
(Rated current)
±50 up to ±1,000 A
Four configurable measurement ranges, depending on the mounted shunt module. See datasheet.
Voltage ±100, ±200, ±500, ±1,000, ±2,000 V
For the acquisition of transient overvoltage, the measurement range is dimensioned to ±2,000 V.
Measurement data rate
ECAT 1, 2, 5, 10, 20, 50, 100, 200, 500, 1,000 kHz
CAN 1, 2, 5, 10, 20, 50, 100, 200, 500 Hz, 1, 2, 5, 10 kHz
Output signals
ECAT and CAN Voltages HV+ → HV-; HV+ → PA; HV- → PA; current,
shunt temperature, module temperature
CAN With option Calc. additionally: RMS values for voltage and current, active power, apparent power, reactive power and power factor
Integration time RMS value and power calculation 10 ms to 10 s
Measurement categories
CAT 0 1.000 V
CAT II 600 V
Operating conditions
Housing protection class IP67
Operating temperature range -40 °C to +120 °C
Pollution degree 4
HV Breakout Module Type 1.2+U front view
HV Breakout Module Type 1.2+U front view
HV Breakout Module Type 1.2+U side view
HV Breakout Module Type 1.2+U side view
HV Breakout Module Type 1.2+U top view
HV Breakout Module Type 1.2+U top view


Typical applications are measurements between HV battery and inverter, both to check the symmetry of the supply voltage to PA and to simultaneously characterize a DC consumer and record its interaction with the vehicle electrical system.

The direct output of power and RMS values allows various analyses without the use of special hardware and software in the road test. More in-depth analyses, such as the investigation of leakage currents and symmetries as well as the correlation with measured values from further CSM measurement modules (e.g. temperatures) can be performed with the Vector CSM E-Mobility Measurement System.


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During the development and validation of electric vehicles, a series of tests must be carried out in the high-voltage environment. HV-safe measurements of currents and voltages must not only be made...

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