Power meter provides electrical energy analysis

The Yokogawa CW140 is a new electrical energy analyser designed to measure not only instant power consumption but also energy demand over a selected time period.

The Yokogawa CW140 is a new electrical energy analyser designed to measure not only instant power consumption but also energy demand over a selected time period.

The instrument's operating modes also include a harmonic measurement function which allows the implementation of harmonic suppression studies.

The CW140 may be equipped with up to four clip-on current transformers, allowing the independent measurement of two power systems simultaneously using the three-wire connection method.

Four-wire measurements using the three-wattmeter method can also be made, including leakage current checks.

The large (5.9 inch) built-in LCD display allows fully menu-driven operation via five function keys.

As well as carrying out voltage, current and power measurements, the unit will measure and display reactive power, power factor, phase angle, frequency and kilowatt-hours.

In the energy measurement mode, maximum demand will be logged along with time of occurrence.

Demand time settings are adjustable from five minutes to 12 hours, and the percentage load factor is also calculated.

The CW140 may be specified with a choice of current clamps with ranges from 20 A up to 700 A.

Voltage ranges are 150, 300 and 600 V, and power measurement accuracy is 1%.

The CW140 is compact and lightweight (approximately 1.2 kg), making it ideally suited to field power consumption studies in industrial plant and building complexes.

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