Electric process heaters that will be exposed to flammable materials in explosive environments need to be properly evaluated to protect the equipment and workers against catastrophic failures.

Multi-process welding machines have been around for a while, and it's easy to understand their appeal. Instead of having separate machines to do MIG, TIG, and stick welding, why not get one machine ...

An introduction to the symmetric, multiphase, wound-rotor “synchronous” doubly-fed motor or generator system, called SYNCHRO-SYM. How SYNCHRO-SYM is only possible with brushless, automatic, ...