Description; Technical Description, Variants; Machine Ends Designation; Fig. 1 Machine Ends - Siemens 1D Series Operating Manual

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2 Description

2.1 Technical description, variants

Machines series, 1D are three-phase brushless synchronous LV and HV generators with a salient-type or
cylindrical rotor. They consist of an AC generator (main machine) and an exciter with rotating rectifier. Main
machine and exciter rotors are fitted together with rotating rectifier and fan on the same shaft. Voltage
regulating parts are located in a terminal box or belong to machine supply being installed in switchboard. All
these parts form a compact component along with welded cover and bearings.

2.1.1 Machine ends designation

For a clear description machine ends are designated as follows (
Fig. 1) DE side being at free shaft end where generator drive is connected. Machine sense of rotation is
defined when viewed from this machine side. The other machine side is designated as NDE with no shaft
outlet; also exciter with rotating rectifier are mounted here.
DE
Product documentation 1D 3.8.en

Fig. 1 Machine ends

Rev. E, 10/13
NDE
page 11/42