 Each boiler powered a turbo generator, made by Parsons, Newcastle upon Tyne. These were three-cylinder reaction type steam turbines operating at 3,000 rpm, generating 60 MW of electricity. The stations used them because of a Statutory Order of the Ministry of Supply in November 1947 that all turbo alternators made for the home market could only be of 60 MW at advanced steam conditions. Stella South had a total generating capacity of 300 MW and Stella North originally 240 MW (later recorded as only 224 MW). The stations were the first to use silica removal beds in their turbines, a development which became standard within the CEGB's power stations for some time. In 1967, one of the sets at Stella South became the world's first in commercial operation to use brushless excitation. The set was modified by Parsons to use A.C. exciters and silicon diode rectifiers. The stations' switchgear was manufactured by A. Reyrolle & Company.
