WPRT Wirewound Resistors Welwyn / TT Electronics WPRT Wirewound Resistors feature 10W to 50W power range, up to 250W overload, quick connect or soldered tags, optional mounting bracket, and flameproof construction. These high-power resistors offer high overload rating and optimized surge energy capacity and are designed for high-power energy conversion systems in such areas as electric vehicles and motor drives. Welwyn / TT Electronics WPRT is ideal for use in industrial, automotive, and energy.