BFG Line (IIB) - Low Voltage (ATEX)

BFG Line (IIB) - Low Voltage (ATEX)

( Up to 900KW )


Description :

The present catalogue refers to TEFC Flameproof, Low Voltage, three phase, squirrel cage induction motors, ribbed frames, BFGC series with shaft height from 71 to 400 mm, and BFG series with shaft height 355, 400 and 450 mm, with the following powers:

Motor series BFGC (IIC):

0.37 up to 450 kW 3000 RPM
0.25 up to 500 kW 1500 RPM
0.18 up to 450 kW 1000 RPM
0.12 up to 400 kW 750 RPM

Motor series BFG (IIB):
250 up to 710 kW 3000 RPM
250 up to 900 kW 1500 RPM
200 up to 710 kW 1000 RPM
160 up to 630 kW 750 RPM

This range of motors up to 90kW comply with efficiency classification EFF2 as established between CEMEP and European Community.

Particular specifications related to Hazardous Areas :

The motor series BFGC and BFG comply with European Standards EN 50014 and 50018, and are suitable for the following Groups of Gases and Temperature Classes:
motor series BFGC: Gases of group IIC, and temperature class T4
motor series BFG: Gases of group IIB, and temperature class T4

Under request, are available other temperature classes on these motor series.

This motor series has the CE ( ) marking in compliance with European Directive 94/4/EC (ATEX), and are classified as equipment group II (Surface Industries), suitable to use on the following zones:
Category 2, for Zones 1 and 2 – Gases and Vapours (G), frame sizes up to 225 included.
Category 2, for Zones 1 and 21 – Gases, Vapours and Dust (GD), frame sizes 250 and above.
Category 3, for Zones 2 and 22 – Gases, Vapours and Dust (GD), frame sizes 250 and above.

Special design to suit Zone 21 will be available on request.

As standard execution, the motors are fitted with flameproof terminal boxes for gases of group IIB or IIC, with specification code EEx d, IIB or EEx d, IIC. Under request and as an alternative execution, these motors can be fitted with an Increased Safety terminal box complying with standard EN 50019. In this case the description code is EEx de, IIB or EEx de, IIC.
The flameproof motors in this catalogue are certified according to the above standards, by the Notified Bodies ISSEP in Belgium (formerly INIEX) and PTB in Germany, accredited organizations by EU.


The motor series BFGC and BFG are manufactured according to IEC and equivalent national standards:

Rating and performance - IEC 60034-1
Outputs and dimensions - IEC 60072 and EN 50347
Mechanical protection - IEC 60034-5
Cooling method - IEC 60034-6
Mounting arrangements - IEC 60034-7
Insulation class - IEC 60085
Terminals identification and rotation - IEC 60034-8
Noise limits - IEC 60034-9
Balancing and vibration limits - IEC 60034-14


Mechanical protection: IP55
Insulation: Class F
Temperature rise: 80 K
Frames: are in cast iron, (except frames 180 - 225 which are in steel)
Terminal boxes: are in cast iron
Endshields/flanges: are in cast iron
- Up to frame size 315 are in polypropylene, (except frames 180 – 225 which are in steel)
- On frames 355 and above, are in polypropylene or aluminium alloy.
Fan cover: in cast iron or pressed steel, capable to withstand impact of 7 Joule.
Finish: Industrial paint system, standard color RAL 5010.

Voltage and Frequency:

Frame sizes up to 315 included:
As standard, these motors are wound to operate on the following
voltage range:

230 V - 50Hz Up to and including 2.2 kW (*)
400 V - 50Hz
400 V - 50Hz For powers 3 kW and above
(*) – under request available higher outputs

The electrical data described in the present catalogue, is based on the standard supply voltages shown above.
Depending on actual supply voltages/frequencies, this data may vary slightly but the variations will generally remain within the tolerances given by IEC 60034-1.

Frame sizes 355 and above:
These motors are spot wound for fixed voltage and frequency. The electrical data presented in this catalogue refers to 400V, 50Hz.
For both cases, and under request, are available voltages up to 690V, and frequencies 50 or 60Hz.



Rotor Tech Co.,Ltd.
89/22 Moo4 Klongthanon, Saimai, Bangkok 10220
Tel. 0-2191-5387, 08-6355-6818 Fax. 0-2191-5388
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