s
Product documentation 1D
3.8.
en
Rev. E, 10/13
page 11/42
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 (
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.
Fig. 1 Machine ends
DE
NDE
