|Power||Up to 3.100 kW|
|Voltages||Up to 690 V|
|Poles||4, 6 and 8|
|Cooling||IC 81W (IC 86W, IC 611, IC 616, IC 666 on request)|
|IP||IP 55 (IP 23, IP 44 with filters, IP 24W NEMA, IP 56 on request)|
|Enclosure||TEWAC – Totally Enclosed Water to Air Cooled|
|Main Applications||Cement, Chemical, Manufacturing processes, Metals, Mining, Power, Pulp and paper, Sugar mill, Water pumping and treatments|
HousingRigid frame, rugged welded steel fabrication (EN 10025 - S235 JR). Frame is provided with side ribs to increase the strength. Marelli Motori motors for continuous duty operation are designed to meet vibration levels per IEC 60034-14, ISO 10816-1 and BS 5000-3.
ShieldMade of hot-rolled structural steel (EN 10025 – S235 JR)
Made in carbon steel (EN 10083 – 2 C40 – TN)
Cylindrical shaft with key.
|Main terminal box||
Main terminal boxMounted on side (right or left to be selected).
Made of formable steels EN 10130.
Internal FanMade of hot-rolled structural steel (EN 10025 – S235 JR).
Cooling SystemIC 81W as per IEC60034-6. Primary fluid (water) is flowing by external water system. Internal air is flowing by a fan mounted on the shaft of the generator at the driven side.
|Degree of protection||
Degree of protectionIP 44 as per IEC60034-5. (Available up to IP 56)
MountingIM B3 and V1 as per IEC60034-7.
Stator/Rotor coreLaminated and enamel-insulated on both sides to minimise eddycurrent losses. The stator winding is made of flat copper or round copper wire depending on the machine size.
The completely wound stator pack is thereby impregnated in an epoxyresin VPI. The subsequent heat treatment hardens the resin.
RotorSquirrel cage rotor type.
Depending on machine size, the rotor construction is either a solid shaft or welded ribbed shaft. The rotor winding can be either a pressure die cast aluminum or a copper bar construction.
Antifriction bearings grease lubricated (ball or roller type) or oil lubricated sleeve bearing.
The theoretical lifetime of bearings, L10h according to ISO 281/1 standard, of standard horizontal construction generators, without external forces (radial and / or axial) is in excess of 50.000 hours. On request, the lifetime of bearings, L10h can be in excess of 100.000 hours.
Locating bearings are on the D end side and floating bearings on the ND end side.
Both bearings are fitted with a regreasing system.
The used grease is removed through a valve locked in the outer bearing cover. Sleeve bearings available as an option.
On request special bearings are designed where high radial and axial forces are applied. All configurations are designed to withstand the following marine inclination.
Dedicated constructions available for different values.
Impregnation systemStator and rotor are VPI treated with an unsaturated polyester amide resin which is polymerisation in oven.
Insulation systemLow voltage
Stator: F class insulated with a synthetic enamel.
(H class insulation available on request)
Protective treatmentsMarine dedicated protective enamel is applied on the winding.
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