Three phase multi-function electrical measurement device
Tesch
In 3-phase A.C. power systems, typically four analog measuring instruments are used: three for phase currents, and one for voltage through a phase-selector switch. The M610 combines these measurement functions into a single compact instrument, which cyclically displays currents and voltages of all 3 phases simultaneously. This 96 x 96 panel-mounting instrument saves panel space and reduces wiring and assembly labor.
The M610 measures and displays line-neutral and line-line voltages. The instantaneous, 15-minute averaged, and peak values of the measured phase currents are displayed sequentially. The sequencing of displayed parameters is done either automatically or manually on demand. When the instrument is switched on, the same parameter is displayed as at the time it was switched off earlier. When stepping on to the next parameter display, the character "n" appears on the lower left of the display. If the "F" key-switch is kept pressed longer, after 2 seconds the character "r" is indicated and the display steps to the next sequenced parameter. Keeping the "F" key-switch pressed even longer, the character "c" is displayed and the peak and average values are re-set.
Standard current transformers can be connected directly to the M610, because the required shunts are already installed in the instrument. 35 standard current transformer ratios are pre-programmed in the instrument, and any of these can be selected by the user.
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