Many tests are necessary for the development of electric vehicles. Considering the costs and time, these should ideally be performed at the same time. With CSM‘s HV BM 1.2+U, several performance and safety-relevant current and voltage measurements can be done with just one module.

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 is suited for the simultaneous measurement of internal conductor current and voltage.

How it works
With HV BM 1.2+U, the voltages of HV+ to ground (PA) and HV- to ground are also measured. 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 only 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.

Features

• • 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