IEEE 1095:2012 pdf free download

IEEE 1095:2012 pdf free download.IEEE Guide for the Installation of Vertical Generators and
Generator/Motors for Hydroelectric Applications.
The stator core is composed of electrical grade steel laminations treated with insulating enamel and slacked on keybars or core studs attached to the frame. The laminations are clamped in place by means of finger and flange assemblies, with the required clamping pressure applied and maintained with core studs.
The stator winding may consist of single- or multi-turn coils or half-turn bars. Double-layer windings, having two coil sides per slot, are most commonly used. The coils or bars are secured in the stator slots by wedges driven in grooves located at the top of the slots and by side-packing provided separately or integrally with the coil or bar. End windings are braced to restrain movement due to short circuits and to prevent possible downward movement of the stator coils or bars. Temperature detectors are generally installed between coils in a selected number of slots to indicate the temperature of the winding during operation.
5.3 Rotor construction
The rotor Consists of a rim, to which the field poles are connected, and a structural support assembly. termed the rotor “spider,” used to connect the rim to the shaft.
The rotor rim is almost always a laminated-type, built up of segmental steel laminations bolted together to forni one or several homogeneous rings. For some very small (5 MVA—l0 MVA), high-speed (1000 rpm and above) generators, the rim may be a solid steel ring. This rim is frcc to expand without constraint from the spider, but it is keyed to the spider periphery for torque transmission and centering. Often the rim is shrunk onto the spider to minimize the differential radial movement between the two structures. The rim can float at some level above rated speed, but it may float below rated speed (floating rim). The field poles are attached to the rim by bolts, studs, dovetails, or T-tails.