Because both primary and secondary circuit of inverter has many harmonic and high frequency components, power measuring instruments require wide bandwidth and high accuracy performance.
The PZ4000 can measure the high frequency voltage and currents which contain high harmonic content found in power inverters. Both the input and output of a three-phase inverter can be measured simultaneously, and the efficiency calculated. Power measurement of a three-phase three-wire system can be made using the two wattmeter method with two input modules. Since the PZ4000 can be configured with 4 input modules, it can perform the functions which previously required two instruments. Or, a synchronized measurement of 2 PZ4000s is possible with the trigger in/out function (master-slave connection). Harmonic measurement function enables measurement of fundamental power component and each harmonic order. Vectors for relationships of fundamental components of voltage and current can be displayed to give a visual presentation of the balance between the 3 phases.
Performance required from power meter
Benefits for the user
The PZ4000 is designed for High Frequency Power Measurements as well as Transient Power Measurements. Its real-time acquisition system can perform cycle-by-cycle power measurements. One to Four input elements offer Basic Power Accuracy of 0.2% with 2 MHz Bandwidth and 5MS/sec digitizing rates.