B6C B5C B5H
|Power||Up to 2.400 kW|
|Voltages||Up to 11.000 V|
|Model IP55||LV A6C - B6C - A5C - B5C|
|Frame||71 ÷ 560|
|Poles||2, 4, 6, 8 and 10|
|Cooling||IC 411 ( IC 416 optional)|
|IP||IP 56 or IP 65|
(IP 65 not available for A6C)
|Enclosure||TEFC MOTORS – Totally Enclosed Fan Cooled|
|Main Applications||Cement, Chemical, Manufacturing processes, Metals, Mining, Power, Pulp and paper, Sugar mill, Water pumping and treatments|
HousingMotors from size 71 to 132 are made in cast iron.
Motors from size 160 to 280 are made either in aluminum or in cast iron (optional).
Starting from frame 315 and up to 500 the frame is in cast iron only.
(EN 1561-GJL – 200)
ShieldMade of grey cast-iron (EN 1561 – GJL 200) up to 560 frame size motors.
Made in carbon steel (EN 10083 – 2 C40 – TN) up to 500 frame
Cylindrical shaft with key.
MaterialThe table below, show the materials used on the mechanical components for standard motors.
Terminal box casted with frame for 71 and 80 sizes
|Main terminal box||
Main terminal boxMounted on top and made of cold-rolled formable steels EN 10025 – S235JR or cast iron depending from size. Degree of protection of standard terminal box is IP 55.
Cooling SystemIC 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||
Degree of protectionMotors are supplied in IP 55 as per IEC60034-5 (IP 56 or IP 65 available on request)
MountingMounting and positions are defined according to IEC 60034 - 7
See complete list at page 20 of Industrial motors catalogue.
Stator/Rotor coreLaminated 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 from 355 frame size.
The subsequent heat treatment hardens the resin.
Up to 315 frame size the wound stator pack is impregnated by rolling deep technology.
RotorShort 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.
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 motors, 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.
Sleeve bearings available as an option from 355 frame and above.
On request special bearings are designed where high radial and axial forces are applied.
The motors from 160 to 250 frame size have single screen prelubricated ball bearings (without grease nipples).
The correspondent grease life under normal operating conditions for a motor with horizontal shaft, at 50Hz and maximum ambient temperature of 40°C is
Impregnation systemUp to 315 frame size: stator is impregnated with rolling deep technology.
Starting from 355 frame size: stator is VPI treated with an unsaturated polyester amide resin which is polymerised in an oven.
(For other size is available on request)
Insulation systemLow and medium voltage
Stator: F class insulated with a synthetic enamel.
(H class insulation available on request)
Protective treatmentsDedicated protective enamel is applied on the winding.
GroundingTwo terminals exist for grounding, one inside the terminal box and one outside.
Condensation drainageWhen installed outdoors or used for intermittent work in environments with high humidity levels, motors must be provided with holes for condensation drainage.
Motors with frame sizes from 280 to 500 have holes for condensation drainage as standard. Motors can be supplied with drainage holes on request.
Anticondensation heatersMotors subject to atmospheric condensation, either through standing idle in damp environments or because of wide ambient temperature variations, may be fitted with anticondensation heaters.
Anticondensation heaters are normally switched on automatically when the supply to the motor is interrupted, heating the motor to avoid water condensation.
They are normally mounted on D-end winding heads.
Normal feeding voltage is 220//230/240V.
Motors can be supplied with anticondensation heaters with terminals in main terminal box (Opt. 108) or, with terminals in a separate terminal box (Opt. 109).
The power values normally used are shown in the table below:
Thermal protectionsStandard magnetothermal circuit brakers are sufficient to suitably protect the motor from overloading.
Anyway the motors can be supplied with additional thermal protections with the characteristics described in the following table.
Motors from 315 frame size are supplied with N. 3 PTC with terminals in main terminal box, in standard execution.
Frame size from 355 are supplied with terminals in separate terminal box, in standard execution.
Motors from 160 frame size can be supplied with PT100 thermal detectors on the bearings on request.
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