| 摘要 |
Each integrated voltage and current data acquisition circuit (4r, 4s, 4t) is produced on a separate chip (alpha , beta , gamma ) and the data processing circuit (6) is also produced on a separate chip (eta ). The data processing circuit receives digital signals (dr, ds, dt) carrying data on the voltage and current in each individual phase conductor from each data acquisition circuit and sends a digital fundamental clock signal (c) to each of these circuits. The meter comprises a terminal block (1) with voltage and current terminals for connecting phase conductors and a neutral conductor and voltage sensors (2r, 2s, 2t) and current sensors (3r, 3s, 3t) for all phases. The input terminals for the voltage sensors are connected to the voltage terminals on the terminal block corresponding to the particular phase and an output voltage signal (vr, vs, vt) is send to a terminal of an integrated data acquisition circuit corresponding to this phase. The input terminals for the current sensors are connected to the current terminals on the terminal block corresponding to the particular phase and an output current signal (ir, is, it) is sent to a terminal of an integrated data acquisition circuit corresponding to this phase. |
