A5M B5M

Housing

 Motors from size 71 to 132 are made in cast iron.
Motors from size 160 to 280 are made or in cast iron or in aluminium.
Starting from frame 315 and up to 500 the frame is in cast iron only.
(EN 1561-GJL – 200)

Shield

 Made of grey cast-iron (EN 1561 – GJL 200) up to 500 frame size motors.

Shaft
General data Made in carbon steel (EN 10083 – 2 C40 – TN) up to 500 frame 
Shaft design Cylindrical shaft with key.

Main terminal box
Mounted on top and made of cold-rolled formable steels EN 10025 – S235JR or cast iron depending from size.

Fan
Made of aluminum alloy up to 500 frame.

Enclosure
TEFC MOTORS – Totally Enclosed Fan Cooled

Cooling System
IC 411 as per IEC60034-6
Totally enclosed standard motor, frame surface cooled with fan
4: Frame surface cooled
1: Self circulation of primary coolant
1: Self circulation of secondary coolant
On request for variable speed application an external ventilation unit can be supplied to get the IC 416 cooling type.

Degree of protection
IP 55 as per IEC60034-5

Mounting
IM B3 and V1 per IEC60034-7

Certificate
Marine Survey Certificate supplied with the machine.
Shaft, housing (propulsion) and exchanger are certified by the Marine Classification Society.

Stator/Rotor core

 Laminated and enamel-insulated on both sides to minimise eddy-current losses. The stator winding is made of flat copper or round copper wire depending on the machine size. The completely wound stator pack with housing is thereby impregnated in an epoxy-resin VPI. The subsequent heat treatment hardens the resin.

Rotor

 Short circuit 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.

Bearing
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.

Static
List 15°
Trim 5°

Dynamic
Rolling ±22.5° 
Pitch±7.5°

Dedicated constructions available for different values.

Impregnation system
Stator and rotor are VPI treated with an unsaturated polyester amide resin which is polymerised in an oven.

Insulation system
Low voltage 
Stator: F class insulated with a synthetic enamel.  (H class insulation available on request)

Protective treatments
Marine dedicated protective enamel is applied on the winding.

Optional features

• Dual/multiple winding configuration
• flanged shaft or special shaft end on both sides
• increase protection degree up to IP 56
• encoder
• vibration sensors
• special frame design to suite the application
• special bearings (sleeve or angular contact bearings)
• reinforced winding for VFD operation
• insulated bearings design for VFD application
• shaft earth brush for VFD application
• other options available on request.