Electronic Design

Monitor Transformer Winding's Temperature Without A Sensor

The use of a copper winding as a temperature sensor is not new. The traditional technique is to disconnect the ac power and the load and to quickly make the measurement using an ohmmeter. But the ...
T&D

Neoptix Adds Standard Features to Fiber Optic Power Transformer Windings Temperature Monitoring System

Neoptix Fiber-Optic Sensors has introduced its T/Guard Direct Windings Monitoring System standard with large backlighted LCD and MODBUS RTU communication. Neoptix T/Guard now features a standard four ...
T&D

Temperature Controller Designed for Real-Time Control for Transformers Down to 25 MVA.

Luxtron has released its ThermAsset2 temperature controller, designed for direct, real-time control for power transformers down to 25 MVA. The ThermAsset2 is a much sought-after addition to the ...
Electronic Design

Estimating Temperature Rise of Transformers

Transformers for power applications often are limited in size by an acceptable temperature rise. An acceptable temperature rise of a transformer is usually dependent on limitations of the materials ...
Machine Design

Recognizing motor temperature sensor limitations

In the first installment of this series, "Calculating a practical hotspot safety margin", we discussed how two-parameter thermal models assume that the entire motor, including windings, exhibits one ...