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List 3 3-Phase A.C. Monitor M610

Voltage and Current Measurement

Characteristics

Three-line digital display simulta-neously shows measurements of all 3 phases Displays 15-minute averaged measurements (bimetallic function) Peak value storage and display (drag-pointer function) Automatic sequencing of display-ed parameters User selectable standard current transformer ratios

Description

I

n 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 measu-rement functions into a single compact instrument, which cyclically displays cur- rents and voltages of all 3 phases simulta- neously. This 96x96 panel-mounting instrument saves panel space and reduces wiring and assembly labor.The in the instrument, and any of these can be selected by the user. To select the desired current transformer ratio, the "F" key-switch is kept pressed when the instrument is switched on. Kee- ping it pressed further causes the trans- formers ratios to be displayed, one after another. When the desired ratio is dis- played, de-energisation of the

Technical Features

Measurement of line-neutral and line-line voltages M610 measures and displays line-neutral and line-line voltages. The instan- taneous, 15-minute averaged, and peak values of the measured phase currents are displayed sequentially. The sequencing of displayed parameters is done either auto- matically 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 cha- racter "n" appears on the lower left of the display. If the "F" key-switch is kept pressed longer, after 2 seconds the cha- racter "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 Measurement of individual phase cur-rents through standard current trans- formers with 1A or 5A outputs Current transformer ratio user selecta-ble from 35 pre-programmed standard ratios M610 will cause that value of ratio to be set. This setting is stored in non-volatile memory, protected against power interruption. The phase currents are displayed as in- stantaneous and 15-minute averaged va- lues, the latter being equivalent to the bimetallic function of analog meters. The peak values of measurements are also stored and displayed, similar in function to drag-pointer type peak value registra- tion in analog meters.The Phase voltages and currents sequenti-ally displayed: automatically at 10 se- cond intervals, or manually Large 3-line, 4-digit, 7-segment redLED digital display Measurement mode indicated by LED annunciator lamps Easy to install and operate Plug-in spring clamp connectors Compact: 77 mm depth Peak value storage and display 15-minute averaged measurements (bimetallic function) M610 derives its operating power from the voltage measuring inputs, there- by keeping instrument wiring to a mini- mum. For medium voltage systems, 100V versions of the instrument are available, which display the primary side voltage, with appropriate scaling. Reduces installation and wiring costs DIN 43700 standard panel mountingenclosure M610 , because the required shunts are already installed in the instrument. 35 standard current transformer ratios are pre-programmed

Automation Control Components