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SA2005MPA Arkusz danych(PDF) 6 Page - Sames |
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SA2005MPA Arkusz danych(HTML) 6 Page - Sames |
6 / 12 page sames sames SA2005M http://www.sames.co.za 6/12 Return through Earth Load Imbalance Phase Voltages During normal conditions, the LEDs are continuously switched on. Phase Failure, no voltage The SA2005M will record the energy consumption accurately under this condition Phase Sequence Error Method Result The SA2005M will record the energy consumption accurately under this condition Input / Output Terminals Interchanged The SA2005M will record the energy consumption accurately under this condition Missing Neutral Connection In this case, the meter would register the energy consumption correct. A indication for this condition could be realized external to the IC. The SA2005M will record the energy consumption accurately under this condition One LED is provided for each phase to indicate abnormal operating conditions. In case of a phase failure, the corresponding LED is switched off. In case of phase sequence error, the phase LED’s are flashing with a repetition rate of approximately 1Hz. The direction LED’s will show which phases is swapped, by switching the corres- ponding two direction LED’s off. A connection of a line voltage to the neutral terminal would be indicated in the same way. Description One LED is provided for each current sensor to indicate reverse energy flow. If detected, the corresponding LED is switched off. The SA2005M can be configured to accumulate the absolute energy consumption for each phase measured, irrespective of the direction of the energy flow. The architecture of the meter should provide for a good "phantom neutral" in cases where the neutral is disconnected from the meter. The SA2005M will therefore record the energy consumption accurately under this condition. ANTI-TAMPER CONDITIONS The SA2005M caters for the following meter tamper conditions, which are indicated as follows: Using the RA, RE and IM inputs The following formulas can be used to calculate the LED output and motor pulse rates. Note that for the motor pulse rates shown in the datasheet a MOP pulse followed by a MON pulse is treated as two energy pulses. The following table shows the combinations for some the common rated conditions. IM is selected so that the counter increments to the highest possible rate. 10 20 30 40 60 80 230 230 230 230 230 230 PH/DIR PH/DIR VDD PH/DIR VDD PH/DIR PH/DIR or VDD PH/DIR or VDD PH/DIR or VDD VSS or Open VSS or Open VSS or Open VDD VDD VDD VDD VDD VDD 3200 1600 1600 3200 3200 1600 800 400 400 200 200 100 Motor Pulse Rate (Pulses/kWh) LED Pulse rate (Pulses/kWh) IM RE RA Vmax Imax LED pulses/kWh = 36.8 x RA x Where: Imax = Meters maximum rated current Vnom = Meters nominal voltage RA = 1/3, 2/3 or 3/3 (see Rated RA section) RE = 1 or 4 (see resolution RE section) 3600 Imax x Vnom x 3 1000 1 RE x Motor pulses/kWh = 36.8 x RA x Where: Imax = Meters maximum rated current Vnom = Meters nominal voltage RA = 1/3, 2/3 or 3/3 (see Rated RA section) ImFactor depends on IM: IM = VDD then ImFactor = 16 IM = PH/DIR then ImFactor = 160 IM = VSS then ImFactor = 1600 3600 Imax x Vnom x 3 1000 1 ImFactor x |
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