The Current Transformer (CT) is used to sense AC current in single-phase or three-phase circuits. In the basic instrument-grade current transformer, a single primary conductor passes through the core. The secondary winding has multiple turns to provide a lower output current, as shown in the diagram. This allows the meter to be located away from the high current circuit. (more…)
Differences Between LCD and LED Displays
Digital panel meters (or DPM) typically uses either an LCD (Liquid Crystal Display) or LED (Light-Emitting Diodes) to display information in an alphanumerical format. What are the differences between LCD’s and LED’s and how do you know which one to pick for your application? Read on to find out! (more…)
The Taut-Band Analog Meter
Taut-Band Suspension System vs Pivot and Jewel Mechanisms
The frictionless, shock-proof, taut-band suspension system has demonstrated superiority over the pivot-and-jewel mechanism in all types of analog panel meters. (more…)
Combining the Best of Analog & Digital Instrumentation
Analog Panel Meter
Indication Measurements of process parameters have historically been accomplished by the analog panel meter (APM). Since 1819, when Oersted proved the existence of current in a wire by using a compass needle positioned next to a conductor, APMs have been the main indicator for all kinds of monitoring. (more…)
Managing Transformer Temperatures with An Intelligent Transformer Monitor
Average loading on transformers is increasing as utilities strive for higher asset utilization. Higher loads mean hotter operation and the need for improved thermal management. Intelligent transformer monitors, such as the Weschler Transformer Advantage, provide users with reliable thermal data and flexible cooling control. (more…)