A6C A5C-B6C B5C B5H

ModelA6C A5C
B6C B5C B5H
PowerUp to 2.400 kW
VoltagesUp to 11.000 V
Model IP55LV A6C - B6C - A5C - B5C
MV B5H
Frame71 ÷ 560
Poles2, 4, 6, 8 and 10
CoolingIC 411 ( IC 416 optional)
IPIP 56 or IP 65
(IP 65 not available for A6C)
EnclosureTEFC MOTORS – Totally Enclosed Fan Cooled
Main ApplicationsCement, Chemical, Manufacturing processes, Metals, Mining, Power, Pulp and paper, Sugar mill, Water pumping and treatments
SectorIndustrial
  • Poles | kW | 50 Hz
  • Poles (kW 60 Hz)
  • Main components
  • Construction
  • Technical data
  • Optional features

Poles | kW | 50 Hz

2
2
900
4
4
2000
6
6
1800
8
8
1250
10
10
1000

Poles (kW 60 Hz)

2
2
-
4
4
2400
6
6
2160
8
8
1500
10
10
1200

Main components

Housing
Housing
Motors 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)
Shield
Shield
Made of grey cast-iron (EN 1561 – GJL 200) up to 560 frame size motors.
Shaft
Shaft
General data
Made in carbon steel (EN 10083 – 2 C40 – TN) up to 500 frame
Shaft design
Cylindrical shaft with key.
Material
Material
The table below, show the materials used on the mechanical components for standard motors.
Terminal box casted with frame for 71 and 80 sizes

ComponentsFrame size
71-132
Frame size
160-280
Frame size
315
Frame size
355-400
Frame size
450-500
Frame size
560
Frame Cast Iron Aluminum / Cast Iron Cast Iron Cast Iron Cast Iron Steel
Endshields Cast Iron Cast Iron / Aluminum Cast Iron Cast Iron Cast Iron Steel
Fan Cowl Steel Steel Steel Fibreglass Fibreglass Steel
Fan Thermoplastic Thermoplastic Thermoplastic 2 poles polyamide
>= 4 poles aluminum
2 poles polyamide
>= 4 poles aluminum
Steel
Terminal Box Cast Iron Steel Steel Cast Iron Steel Steel
Main terminal box
Main terminal box
Mounted 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.

Frame sizeType of terminalTerminal size Maximun conductor section [mm²]Maximun cable diameter Clearance holes formetric cablands
71-80 Threaded Terminals M6 10 15 M25 X 1,5 + M20 X 1,5 (aux)
90-132 21 M25 X 1,5 + M20 X 1,5 (aux)
160-250 M8 35 38 M40 Knockout opening
M50 Knockout opening
280-315M M12 120 43 2 X M63 Knockout opening
315L 2 X M63
355-400 Flat copper bars 2 X 300 / Undrilled gland plate
450-500 6 X 300 /
500 M16 8 X 300 /

Construction

Cooling System
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
Degree of protection
Motors are supplied in IP 55 as per IEC60034-5 (IP 56 or IP 65 available on request)
Mounting
Mounting
Mounting and positions are defined according to IEC 60034 - 7
See complete list at page 20 of Industrial motors catalogue.

Technical data

Stator/Rotor core
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 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.
Rotor
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
Bearing
General data
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

  • 10 000 hours in continuous duty for 2-pole motors
  • 20 000 hours in continuous duty for 24-pole motors
The motors from 280 frame size and above have regreasable bearings (with grease nipples Tecalemit UNI type) and the relative exhausted grease drainage.
Impregnation system
Impregnation system
Up 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 system
Insulation system
Low and medium voltage
Stator: F class insulated with a synthetic enamel.
(H class insulation available on request)
Protective treatments
Protective treatments
Dedicated protective enamel is applied on the winding.
Grounding
Grounding
Two terminals exist for grounding, one inside the terminal box and one outside.
Condensation drainage
Condensation drainage
When 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 heaters
Anticondensation heaters
Motors 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:
Frame sizePower [W]
90 - 1128
13225
160 - 18050
200 - 25065
280100
315200
355300
400 - 450400
500600
560800
Thermal protections
Thermal protections
Standard 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.
TypeOperating principleActive temperature [°C]
Positive temperature coefficient thermistors PTCAt the active temperature this device quickly changes its resistance value.155
Platinum resistance thermometer PT100Variable linear resistance with the winding temperature, particularly suitable for a continuous winding temperature monitoring.Set up in control panel

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.

Optional features

List
List
  • Dual/multiple winding configuration
  • flanged shaft or special shaft end on both sides
  • increase protection degree up to IP56 and IP65
  • 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

Our product applications include:

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