Logic Beach offers a variety of 4-20mA output Power Transducers to monitor and record AC power demand from single-phase three-wire and three-phase three or four wire electrical systems. Each transducer uses an integrated split-core current transformer (CT) and voltage sensing leads to monitor current and voltage which are then used to calculate power (measured in kiloWatts, kW). A 4-20mA output corresponds to a true RMS value. This mA output is sampled by any of the analog inputs available on Logic Beach data loggers and then simply scaled to a kW value using algebraic processing available in our data loggers. Logic Beach data loggers are expandable and can monitor up to 44 kW transducers depending upon the data logger model and configuration.

In addition to simply logging power ‘demand’ levels and reporting as desired, our data loggers can quickly be programmed to calculate energy (kWh). Using the provided HyperWare software, integration of the demand over a user defined time interval can be simply done to calculate Energy (kWh) on 15 minute, hourly, weekly, monthly time frame as well as running total consumption. The flexibility of HyperWare can be used to limit measurement to just work days or specific time frames as your application demands.

A sample application of this transducer is demonstrated in predictive maintenance monitoring. This plant discipline is receiving increasing focus in a continual push for decreasing plant down-tme by many plant operators. Part of predictive maintenance is comparing periodic historic operational data from a particular plant system to current operation. As an example, in water pumping applications, monitoring motor power along with bearing temperatures and flow rates can provide an understanding of long-term motor and pump performance. Armed with this data predictions can be made relative to bearing maintenance and motor rebuilding in order to maximize pumping output per kW consumed.