Dallas-based Shermco Industries, a provider of rotating machinery testing, repairing and re-manufacturing, as well as power systems maintenance and electrical damage restoration services, has created two insulation systems designed especially for use in wind turbine generators.
The insulation system for wind turbine generators under 1 MW is constructed to achieve physical, electrical and thermal endurance properties with additional mechanical support for rotating elements to combat vibration fatigue.
This system conforms to UL 1446 requirements for Class H insulation systems below 1,000 VAC and will be certified to the proposed IEEE 1798 for VFD machines once the final version of the standard is adopted.
For larger wind turbine generators, Shermco has created an insulation system with stator and rotor windings designed to be more robust than most original equipment manufacturer designs, according to the company.
The low-voltage stator windings conform to UL 1446 requirements, and the high-voltage rotor insulation systems are designed to surpass the new stringent IEEE 1776 requirements. Dissipation factor, tip-ups and voltage endurance of this system far exceeds normal design parameters for 6900 VAC Class F machines.
Shermco Industries, which developed these systems with the assistance of DuPont Advanced Fibers Systems and other major materials suppliers, will utilize these designs for re-manufacturing and upgrading wind turbine generators.
For more information, visit shermco.com.
SOURCE: Shermco Industries
