Technical Articles

Technical Articles

Technical Articles

Thermal Class Ratings

This article describes what insulation classes are, how they are derived and how to use them. It explains test methodology and data collection for most accurate results.

Bondable Magnet Wire

This white paper explains common methods of bonding magnet wire and provides technical information to help Engineers apply products most effectively.


This document compares the performance of standard enameled magnet wire with our ULTRASHIELD® PLUS Inverter Drive Insulation system.

Testing Inverter Duty Insulation

This paper explains in details the test methods that Essex has used to develop Inverter Duty magnet wire insulation in the absence of industry recognized standards.

Wrapped Conductors

This article provides additional construction details available on wrapped conductor.

Distribution Transformers

Essex offers multiple insulated magnet wires that are compatible with Envirotemp™ FR3TM natural ester oil and 3MTM Liquid-Filled Transformer (LFT) Insulation, with 155°C Thermal Class.