Standard Squirrel Cage TEFC Motors
Type MA -0.12kW-90kW,
Frame 63-280M
Salient features of TEFC Standard Motors :
BBL motors can be continuously overloaded by 10% or can be used up to ambient temperature of 55°C. Temperature rise will be as per Class F limits
All motors are with degree of protection IP55
All motors up to 280M frame are designed for 50°C ambient
2Z Bearings are standard up to 180L frame which are filled with high temperature grease suitable up to 140°C
On line re greasing provided from frame 225 onwards
SKF or equivalent make bearings are used and directly procured from the bearing manufacturers
Terminal boxes are large and can be rotated in steps of 90
Terminal Box location can be changed from RHS to LHS at site
Rotors are dynamically balanced with half key
All foot mounted motors are with integral cast feet
Outer bearing covers are integral with end shield / flange
V Rings are used in IP55 motors and no reduction in efficiencies as compared to IP44 motors
Additional anti tracking protective coating of air drying varnish is applied on the winding overhangs
Cooling fans are of aerodynamic design resulting in low noise and are bi-directional
Standard Motors are suitable for mounting with any shaft orientation
High Efficiency IE2 Squirrel Cage TEFC Motors
Type MH- 0.37 kW - 315 kW,
Frame 71 - 355L
Use of these motors can lead to substantial reduction in energy costs. The payback periods are in the order of 3 to 6 months depending upon the usage. Replacing existing motors with High Efficiency IE2 Motors even in power intensive industries gives a payback within 1 to 2 years.
Salient features of TEFC Standard Motors :
Near uniform efficiency from 50% to 100% of full load
Insulation class F. Temperature rise limited to 70°C over ambient of 50°C
Voltage variation: ±10%
Frequency variation: ±5%
Combined variation: ± 10%
Enclosure: IP55
Energy Efficient Flame Proof Motors Ex`D'
Type MD 0.37kW-90kW,
Frame -80-280M.
Type MJ, 0.37kW-200kW,
Frame 80-315L
These motors can be used in Zone 1 and Zone 2 areas as per IS:5572 and IS:15142. Flame proof motors are offered suitable for Gas Gr.I, IIA and IIB only. BBL flame proof motors are certified and approved for use in Zone 21 & Zone 22 ( Presence of combustible and ignitable dust) as per IS : 15142. Motors are also offered in multi speed and non standard outputs / voltages / frequencies.
Salient features of TEFC Standard Motors:
Type of constructions:
Standard Motors are designed for foot mounting (B3). These are also suitable for B6, B7, B8, V5and V6 mounting without any change.
Motors can be supplied in flange mounting (B5). These motors will also be suitable for V1 and V3 mounting without any change.
The flame proof motors manufactured by BBL are suitable for Temperature Class T1 to T4 as per IS 6381.
Increased Safety Motors Ex 'E'
Type ME 0.12kW - 90kW,
Frame -63-280M
Type MI 0.37kW - 315kW,
Frame 71-355L
Improved Efficiency - Type - ME 0.12kW - 90kW, Frame -63-280M
High Type - Type MI 0.37kW-315kW, Frame 71-355L
Motors are also offered in multi speed and non standard outputs / voltages / frequencies. These motors can be used in Zone 2 areas as per IS 5572 / IEC 60079-7:2001
Salient features of TEFC Standard Motors:
Terminals and Connection:
External connections of client's power cable to the motor terminals in terminal box must be rigidly gripped and secured against loosening and twisting. This is achieved with the help of a specially designed Terminal Plate provided in the Terminal Box.
Terminal Box:
The motors in frame size 63 to 80, 180, 250 to -355 are provided with terminal box on top. Side T Box can be provided on request in frame sizes 180 and above. The terminal box for frame size 90S to 160L is fitted on the right hand side, seen from the driving end. Terminal box on left-hand side can also be provided in frame size 90S to 160Lon request. An earthing terminal is provided in the Terminal Box.
Terminal Boxes in frame sizes 63 to 355L can be rotated through 360° in steps to 90° to suit the cable location.
Non Sparking Motors Ex 'N'
Type MN 0.12kW-90kW,
Frame -63-280M.
Type MS 0.37kW-315kW,
Frame 71-355L
Motors are also offered in multi speed and non standard outputs / voltages / frequencies. These motors can be used in Zone 2 areas as per IS 5572/ IEC60079-15 : 2005.
Salient features of Energy Efficient Motors :
Ex 'n' Motors, provides protection against auto-ignition of surrounding gases/ vapours. These motors conform to IS: 8289 and IS: 9628 and can be used in zone 2 areas.
The surface temperature does not exceed 200°C i.e. Temperature class T3
The Terminal Box has degree of protection IP55
A drain plug is provided on the end shields to remove condensed water
The terminal plate is of a special design such that the terminals are protected against loosening under vibrations
The radial air gap of the motors is such that the minimum air gap values specified in IS: 6381 are fully satisfied
Crane And Hoist Duty Motors
Type MC, 0.37 kW - 400 kW,
Frame - 71-355L
BBL manufactures Squirrel Cage Crane and Hoist Duty Motors with Type 'MC'. These motors are generally one frame size smaller than normal. These motors are not limited to cranes and hoists, but can also be used in applications requiring frequent switching.
Standard 'MC' motors are designed for use for S3, S4 or S5 duty with various Cyclic Duration Factors (CDF). These motors can be offered in various types of mountings and are made with standard 'MA' components. i.e. body, end shields etc.
TEFC Slip Ring Motors
Type MP 1.30 kW-11.5 kW (4P, 6P)
Frame - 71-355L
BBL manufactures TEFC crane duty three phase Slip ring motors with Type 'MP'. These motors are used for cranes requiring frequent start /stops and for speed control. Standard 'MP' motors are designed for use for S3, S4 or S5 duty with various cyclic duration factors. These motors can be offered in various types of mounting.
Brake Motors
BBL manufactures TEFC three phase DC Brake Motors with Type 'MB'. These motors are used for applications requiring positive and instantaneous braking. These motors are 'fail safe', which means that the brake will be applied immediately in case the power supply fails or is switched off.
These motors have a built in rectifier along with a varistor for protecting the rectifier as well as the brake coil from voltage surges. The special brake liner used assures consistent braking torque with minimum wear. This leads to almost maintenance free operation. These motors can be offered in various types of mounting. BBL manufactures these motors in frame sizes from 71 to 132M in 2, 4, 6 and 8 pole.
Multi speed brake motors can also be supplied. Motors from 90S to 132M can also be supplied with a manual release arrangement to manually release the brake.