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HV Breakout Module 3.1 OBC HV Breakout-Module 3.1 OBC

HV Breakout Module 3.1 OBC

Single- to three-phase measurement of current, voltage and power on cables carrying mains voltage for worldwide use

The HV Breakout Module (HV B) 3.1 OBC (on-board-charger) is particularly suitable for measurements during AC charging processes of electric and hybrid vehicles due to its current measurement ranges.


  • Measurement star voltages U1, U2, U3 measured against N (line-to-neutral, wye configuration) and phase currents (I) I1, I2, I3 in HV applications
    • Nominal voltages up to 707 Vrms (measurement range up to ±1.000 V)
    • Currents up to ±88 Arms, ±125 A (Peak)
  • GBit/s XCP-on-Ethernet interface, measurement data rate up to 2 MHz per measured variable
  • Options:
    • XCP-Gateway: Connection of CSM ECAT (fully time-synchronous) and CAN measurement modules
    • PTP Slave
    • Optional calculation of power and RMS values directly in the module and output via XCP-on-Ethernet and CAN

HV Breakout Module Typ 3.1 OBC


With the HV Breakout Module 3.1 OBC, one- to three-phase charging processes of electric and hybrid vehicles can be analyzed worldwide. The three-phase measurement with only one measurement module offers significant cost and space advantages.

For the measurement, the HV Breakout Module 3.1 OBC is installed directly in the mains or charging cables between the mains connection and the charging station or between the Home EV Charger and the OBC. The cables are fed through cable glands into the interior of the module and connected there via cable lugs (M6 threaded bolts or M4 threaded bolts for control channel cables).

Data output (incl. calculated variables) is via XCP-on-Ethernet and CAN. The simultaneous output enables fast data acquisition via Ethernet and simultaneous recording with a CAN data logger.

The star voltages are measured directly in the HV BM 3.1 OBC. Current measurement is performed with shunt modules containing preamplifiers, temperature sensors and a memories for calibration data for automatic online temperature compensation.

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. Via XCP-on-Ethernet and CAN the calculated values are directly transmitted to the measurement computer or a data logger.

Technical Data

Inputs Mains or charging cables for L1, L2, L3, N, PE as well as CP and PP (both fed through)
Number of measured phases 1 up to 3
HV+/HV- power cable connection The mains wires are connected in the device with ring terminals which are mounted on M6 threaded bolts. The control channel cables are mounted on M4 threaded bolts
Number of cable glands 1
per side
Conductor cross section L1, L2, L3, N, PE: max. 16 mm2
CP/PP: max. 2 mm2
Cable outer diameter 5 mm to 28 mm
See datasheet
Measurement signals Current and voltage
Current Phase currents I1, I2, I3 up to ±125 Apeak or 88 Arms
continuous current up to 80 Arms
configurable measurement ranges Irms: 11, 22, 44, 88 A
according to Ipeak: ±15,6; ±31,2; ±62,5; ±125 A
shunt resistance 400 µOhm
Voltage Line-to-neutral voltages U1, U2, U3
configurable measurement ranges Urms: 70, 141, 354, 707 V
according to Upeak: ±100, ±200, ±500, ±1.000 V
Internal resolution 16 bit
Internal sampling rate 2 MS/s
Measurement data rate
XCP-on-Ethernet 1, 2, 5, 10, 20, 50, 100, 200, 500, 1.000, 2.000 kHz
CAN 1, 2, 5, 10, 20, 50, 100, 200, 500 Hz, 1, 2, 5 kHz
Output signals
XCP-on-Ethernet/CAN Phase currents, line-to-neutral voltages, temperatures of shunts and module

With option Calc. additionally: RMS values for voltage and current, active power, apparent power, reactive power and power factor Lambda
Integration time RMS value and power calculation 10 ms to 10 s
Operating conditions
Housing protection class IP67
Operating temperature range -40°C to +120°C
Pollution degree Outside of the housing: 4 (electrical sockets plugged)
inside of the housing: 2

XCP-Gateway Options

The measurement module includes an internal XCP gateway. Various options make it easy to expand the module to meet specific requirements.

HV Breakout-Modul Typ 3.1 OBC Front
HV BM 3.1 OBC front view
HV Breakout-Modul Typ 3.1 OBC Top
HV BM 3.1 OBC top view
HV Breakout-Modul Typ 3.1 OBC Messkoffer
HV BM 3.1 OBC installed in a customized measurement case (not visible)


Designed to measure currents up to ±125 A or 88 Arms, the HV BM 3.1 OBC allows worldwide analysis of AC charging of electric and hybrid vehicles.

The various charging systems worldwide (AC / DC charging stations) with different current strengths and correspondingly varying charging speeds can be easily tested with the HV BM 3.1 OBC and an additional measurement module.

For this purpose, the measurement modules can be installed in an application-specific configured measurement case, to which various power or charging cables are connected via corresponding adapters. The integrated XCP-Gateway also allows easy connection of further CSM measurement technology and joint installation in the measurement case. Due to its compact size and adapted weight, the case can easily be taken worldwide as airline luggage. This allows easy and comparable analysis of worldwide charging systems and verification of interaction with vehicles.

The HV Breakout Module 3.1 OBC can be used to verify the charging process of electric vehicles at different country electrical systems and Home EV Chargers. If an additional HV Breakout Module 1.2 is installed between the on-board-charger and the vehicle battery, the efficiency of the OBC can be calculated.

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 on-board.charger (OBC) efficiency analysis, can be performed with the Vector CSM E-Mobility Measurement System.

Measurement between charging station and electric vehicle
Measurement between charging station and electric vehicle with with a customized measurement case


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Being able to charge e-vehicles worldwide is an important goal in the development and improvement of components involved in charging processes. National differences in power grids as well as...

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