Three-phase alternator MJT series

multipolelow-voltagefor hydroelectric power plants

Housing Rigid frame, rugged welded steel fabrication (EN 10025 - S235 JR). Frame is provided with side ribs to increase the strength. Marelli Generators for continuous duty operation are designed to meet vibration levels per IEC 60034-14, ISO 10816-1 and BS 5000-3. Shield Made of spheroidal graphite cast-iron (EN 1563) or grey cast-iron (EN 1561) up to 630 frame size. Made of structural steel (EN 10025 – S235 JR) above. Shaft General data Made in carbon steel and obtained by lamination (EN 10083 – 2 C40 – TN). Shaft is obtained by forging from 290 mm diameter and above. The shaft is tested at the manufacturer in order to check it is defect-free. Shaft design Double bearing generator: cylindrical shaft with key. Dedicated shaft design available on request. Special shaft design for direct coupling with runner are available on request. Main terminal box Mounted on top up to 900 frame size. Made of formable steels EN 10130. Fan Made of aluminum alloy (EN 1706) or structural steel (EN 10025–S235 JR) depending on application requirements.