High-voltage machines Surface-cooled up to 2,000 kW
7Pages

Rated outputs at U > N =3 - 6,6 kV (Basic design) To relevant standards: IEC, VDE, DIN, ISO, EN Degree of protection IP55, cooling IC411 > 200010000 Non Sparking to EN 60079-15 Type of protection Exe to EN 60079-7 > Frame560 Frame355Frame400Frame450Frame500 Rated voltages from 2 to 11 kV > Frame560Frame400Frame355Frame450Frame500 Rated frequency 50 or 60 Hz > Frame560Frame400Frame450Frame500 Number of poles 2p=2 to 8 (higher number of poles onrequest) Construction IMB3 and IMV1 (others on request) > Rated output in kW 2 1) 48No. of poles6Frame400Frame355Frame450Frame500 1) Higher outputs on request Main dimensions at: 6kV, IMB3, Anti-friction bearings Terminals > air inlet Dimensions in mmFrame SizeNo. ofA AB AE B BC H HD Lpoles3552-8610 730 870 900 70 355 1107 1785 4002-8686 810 950 1000 75 400 1207 1871 4502-8750 940 1080 1120 45 450 1327 2091 5002 > 1) -8850 10501140 1250 93 500 1435 24205604-8950 1160 1190 1400 93 560 1553 2645 > 1) 2p=2 with sleeve bearings only 3 >

Frame and endshields are made of cast iron. Motor feet are cast on.For each shaft centre height only one frame length is used. To ensure optimum use of material, the finite element method wasused for the design. The frame design ensures the highest possible strength, torsional rigidity, and vibrostability. Segmental ribs and asymmetric arrangement of the terminal boxmake for a larger heat-radiating frame surface. In addition, cooling ribs are arranged on the frame inside around the endwindings. Main and auxiliary terminal boxes are arranged on the cable duct on top of the frame. Cable entry...

For particularly high radial loads, all motors are provided with acylindrical roller bearing at the D-end. > Shaft seals are maintenance-free. They protect the bearingsagainst the ingress of dust and spray water, to degree of protection IP55. For lubrication, lythium-soap grease is used. All motors are fittedwith standard lubricators M10x1. Outer bearing covers are designed to accommodate 5 years quantity of spent grease. The shaft seal on the bearing inside is a felt ring; on the bearing out- side a labyrinth seal is used. Our motors in basic design are fitted with Series 3 (medium)...

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Developments in the field of insulation led in the 80Βs to the intro-duction of the V-Celastik > insulating system. This is a system usingthe VPI technique which also corresponds to Class F. VPI means that the complete stator (core and windings) isimpregnated with artificial resin in a vacuum/pressure process. The result is a winding with excellent thermal, electrical and mechanical properties.The constantly high quality of the high-voltage insulation is en-sured by the latest in manufacturing equipment. > 7/0267 Wound stator prior to impregnation The impulse withstand level of the windings...

In the basic design, the deep-bar squirrel-cage winding consists of copper bars, brazed to short- circuiting rings. Depending on rotor stresses, eit- her butt or grooved bar-to-ring joints are used. For higher starting torques, or to meet therequirements of particular torque character- istics, special slot designs can be used. The comparatively low resistance of the copperwinding results in low current/heat losses and, consequently, in high efficiencies. The copper bars are driven into the core slotsand peened to ensure absolutely positive seat- ing. This prevents any movement of the cage...

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