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M650 DISPLAY DRIVER DOWNLOAD

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If the meter is located at d and the point of delivery is at a Figure 12 the results shown below are the settings A, B, C, and D for the M Same as Case 1 Subtract Line cd losses only. Just below the space for the injected values, there is a section indicating the predicted values for uncompensated total watts, uncompensated total VARs, uncompensated total VA, compensated total watts, and compensated total VARs. All cells containing numbers in boldface red type must be entered as configuration settings in the M You are now ready to begin your test. Subtract Transformer and Line cd losses.

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Since the meter is downstream from the point of delivery, all four settings displayy be positive in order for the losses to be added to the uncompensated power. All information specifically related to Loss Compensation, including a copy of this application note, a spread sheet to help calculate the meter settings and firmware v3.

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Loss Compensation is available on M65x family meters with the option code M3 running firmware v3. Disolay the M, Part 1: The results given in the spread sheet are the five settings to be entered in the M configuration.

Potential errors can be minimized through familiarity with Cases 1 through 5. Settings should always have the same sign. By making the settings negative, the losses will be subtracted from the uncompensated measurements in diisplay to produce compensated measurements. The test results and operating characteristics of the transformer shown in Table 1, below, are required in order to calculate the meter settings A, B, C, and D.

All cells not highlighted in yellow are protected in order to prevent accidentally overwriting a formula used for calculations.

Just below the space for the injected values, there is a section indicating the predicted values for uncompensated total watts, uncompensated total VARs, uncompensated total VA, compensated total watts, and compensated total VARs. Line losses for segment ab plus transformer losses, where the meter is on the same side of the transformer as the compensated line. The Comp Testing spread sheet may be used to calculate the predicted values for any combination of the settings A, B, C, D, and E, and injected voltage, current and phase angle.

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Since the line segment cd is on the opposite side of the transformer relative to the meter, the coefficients Acd and Ccd must take into consideration that the current passing through line segment cd is not the same as the current sensed by the meter.

Measurement, Recording & Time Sync

Line losses only, segment ab. Be sure the signs of the settings are all positive, so the losses disp,ay be added to the uncompensated measurements in order to produce compensated measurements.

One copy of the CD is included with every order. If the meter is at a and the point of delivery is at b Figure 5 then multiply the results shown below by negative one before entering as the settings A, B, C, and D on the M The screen will look something like Figure A2. Then, in the pages following, several cases are described which illustrate how to calculate the settings A, B, C, and D for whatever orientation the meter will have relative to the point of delivery. Same as Case 3 settings negative Case 5 settings negative Figure 3.

They must be derived. Since the meter is upstream from the point of delivery, all four settings must be negative in order for the losses to be subtracted from the uncompensated power.

Read and follow the directions for that case. But for the purposes of calculating the meter settings, power flowing in the direction indicated by the arrow in Figure 2 corresponds to a positive display on the M If the meter is located at d and the point of delivery is at a Figure 12 the results shown below are the settings A, B, C, and D for the M Use the diagram in Figure 2 and the table in Figure 3 in this application note displya decide how the M meter will be oriented relative to the point of delivery, observing the displaay of power flow intended to display as positive on the meter.

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M | Davtron Inc

Line losses for segment ab plus transformer losses, where the meter is on the opposite side of the transformer from the displayy line.

To subtract losses, be sure the settings are all negative. If expressed in kW, multiply by to get units of watts.

These are generally the impedance characteristics of any lines, the test data for the transformer, the CT and VT ratios of the instrument transformers. Making all of the settings equal to zero turns off loss compensation.

The meter might be located at any point defined in Figure 2; a, b, c, or d; and the point of delivery might likewise be at a, b, c, or d. You are now ready to begin your test.

The spread sheet may be downloaded from the public Eisplay Site. If the meter is located at c and the point of delivery is at a Figure 7 the results shown below are the settings A, B, C, and D for the M Location of the Meter a Point of Delivery a b No compensation necessary.