User manual CARLO GAVAZZI SPT-90 CONFIGURATION

[. . . ] ENGLISH SPT-90 OPERATING INSTRUCTIONS General features _________________________ 2 Technical features ________________________ 2 Installation ______________________________ 5 Preliminary operations _____________________ 7 Front panel description ____________________ 8 Operating mode __________________________ 9 Accuracy information _____________________ 19 Useful information ______________________ 22 Appendix ______________________________ 25 Important: We suggest you keep the original packing in case it is necessary to return the instrument to our Technical Service Department. In order to achieve the most from your instrument, we recommend you read this instruction manual carefully. 1 CARLO GAVAZZI Instruments SPT-90 16-bit P-based modular smart power transducer rev. 1 Operating instructions Important: We suggest you keep the original packing for a further shipping of the instrument. In order to guarantee a correct use of the transducer, we recommend the user to carefully read the present instruction manual. ENGLISH GENERAL FEATURES The most important features are: Only two basic models TRMS measurements 5 input ranges Connections to CT and VT, full range CT and VT ratio programming Measurements of W, Wavg (programmable from 1 to 30 minutes), VA, var, (power factor) cos, Wh, VAh, varh, Amax (among the phases), Vdelta avg, VL1-N, VL2-N, VL3-N, Hz L1 Outputs: 20mA, 5mA, 10mA, 20mA, 10V, 1V, 5V, 10V (all with scaling), DC pulse (programmable pulse for kWh, KVAh, kvarh), serial RS485 (MODBUS/JBUS), RS232 and alarm set-point. [. . . ] As a result, the programmable value, excluding the decimal point, will be as follows: -999 Lo. E 999. Should one or more of the preceding retransmitted measurements have been modified, then the displayed value will be "000", otherwise the 12 display will show the value set during the last programming. At the first switching on, the value of "Lo. E" is automatically set to "0" by the transducer. This value can be changed in order to have a different beginning of scale corresponding to the "Lo. A" analogue output. electrical scale of the measurement (Hi. E is connected to the Hi. A output value). This value is preceded by the same symbol indicating the multiplier of the measured variable as per "Lo. E"; also the decimal point is the same as per "Lo. E". The value of "Hi. E" is to be higher than "Lo. E" of at least 50 digits. Programmable value: Lo. E + 50 Hi. E 999. "Hi. E" is normally calculated by the transducer in accordance with both CT and VT ratios (see table below). If necessary, this parameter can be changed in order to have a lower/higher full scale corresponding to the "Hi. A" of the analogue output. Should one or more of the preceding values (that is CT ratio, VT ratio, selection of the measurement, Lo. A, Hi. A) have been modified, then the displayed value will be calculated according to the full scale of the transducer multiplied by the CT and VT ratios; if none of the previous variables has been modified, then the display will show the previously VARIABLE r1 - System's active power (W) r2 - System's apparent power (VA) r3 - System's reactive power (var) r4 - Average active power (Wavg) r5 - System's power factor r6 - Maximum current r7 - Phase-phase average voltage r8 - Phase-neutral voltage phase 1 r9 - Phase-neutral voltage phase 2 r10 - Phase-neutral voltage phase 3 r11 - Frequency phase 1 Standard HiE HiE = VL-N * VT * Dp * IN * CT * PH HiE = VL-N * VT * Dp * IN * CT * PH HiE = VL-N * VT * Dp * IN * CT * PH HiE = VL-N * VT * Dp * IN * CT * PH HiE = L. 00 HiE = IN * CT HiE = VL-L * 3 * VT * Dp HiE = VL1-N * VT * Dp HiE = VL2-N * VT * Dp HiE = VL3-N * VT * Dp HiE = 100 IN= rated current PH= number of phases DP= multiplying value of the decimal point (1, 10 or 100) 13 ENGLISH programmed value. Example 1: the transducer is a three-phase model for unbalanced loads and requires a rated input of a 100/s 3V phase-neutral voltage and 5A current (AV3. 3 model). The mains is 20, 000V phase-phase voltage and the maximum current for each phase is 500A. Therefore, the relevant parameters become: in. C P-S = 100; in. V d. P = 111 (no decimal point) P-S = 200. The analogue output "OUTPUT 1" is a 4-20 mA (Lo. A = 20. 0%, Hi. A = 99. 9%) and the selected retransmitted measure is "r1" (system's active power). The automatic calculation of the full scale made by the transducer is 20, 000 / s3 x 500 x 3 = 17. 3MW (V / s3 x I max. Prior to the setting of "Lo. E", the display will show the segment close to "M" (mega), which will be blinking, followed by 00. 0. The same segment will appear for "Hi. E" followed by 17. 3 (full scale value). The analogue output value will be 4mA when the power is equal to 0 and 20mA when the power is 17. 3 MW. Example 2: The mains is 10kV phase-phase voltage. With the same procedure described in example 1, select the "r7" measurement (average phase-phase voltage). The "Lo. A" value will be set at 80. 0 (80% of the output full scale = 16mA) and the "Hi. A" value at 20. 0 (20% of the full scale = 4mA) . [. . . ] Setting of the integration time expressed in minutes. The exit from programming can occur also for time-out after approx. The display will then show only a blinking point (if it's not an alarm). When the instrument exits from programming due to time-out, the last parameter which was being programmed will not be saved in the EEPROM memory. [. . . ]