Analog measurements and transient recording with the CMC 356 or CMC 256plus

EnerLyzer transform the CMC test set into a multifunctional measuring, recording and analysis device. Each of its binary inputs can be configured as an analog measuring input and can then directly measure voltages as high as 600 VRMS. Currents are acquired via the measuring shunts or current clamps. The CMC test set can be used for conventional testing and simultaneously for measuring with EnerLyzer

Broad range of applications

EnerLyzer offer a wide range of views and analysis tools: both direct and derived measurands can be displayed as numerical values (multimeter view) or in phasor diagrams. The harmonic analysis facilitates the quick and easy examination of the harmonic content and shows the total harmonic distortion (THD) value. The CMC can also be used as a multichannel transient recorder. TransView is included to enable a more detailed analysis of the transient values recorded in this way. These tools allow faults to be localized quickly and easily and the corresponding system parameters to be evaluated.

Typical applications:

  • Troubleshooting during commissioning or maintenance testing of protective devices
  • Recording of transients during switching operations
  • Analysis of transformer inrush events (for example, analysis of harmonics to adjust the blocking)
  • Analysis of starting characteristics of motors (current/voltage curves, determining start-up times)
  • Measurement and analysis during generator synchronization with synchro-check function
  • Diagnosis of timing characteristics of circuit breakers and their auxiliary contacts
  • Analysis of system perturbations and power quality (for example, THD, harmonics)
  • General measurement functions (for example, plausibility checks for voltages, currents, power)


Trend recording

Important quantities (for example, RMS of currents and voltages, frequency or power) are displayed in a chart as a function of time. Selecting longer measuring rates enables an analysis to be carried out over longer periods (for example, weeks, if the measuring rate is in seconds). The recorded data can be exported in CSV format for further processing.


Transient recorder

The maximum sampling frequency is 28 kHz, while the maximum recording duration depends on the number of channels being used and the selected sampling frequency (one channel at 3 kHz produces a recording time of more than five minutes). The recordings are stored in COMTRADE file format (C37.111-1991/1999) and can be analyzed in TransView.

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