Authorized Dealers of
 
Bharat Bijlee Motors
 
Rotomotive Motors, Geared Motors, & gear Boxes
 
Lawkin Electric Motors
 
MGM Varvel Motors, Geared Motors & Gear Boxes
 

Bharat Bijlee Motors

 

Three Phase Induction Motors

 Safe Area Motors (Motors For General Application CGA1/D)
 
Standard Squirrel Cage TEFC Motors

Type MA -0.12kW-315kW,
Frame 63-355M
 

Conformance to Standards

All motors comply with the following Indian and international standards:

IS 325 Three phase Induction motors-specification
IS:900 Code of practice for installation and maintenance of induction motors
IS 1231 Dimension of three-phase foot mounted A.C. Induction motors
IS 2223 Dimensions of flange mounted A.C. induction motors
IS:4029 Guide for testing three phase induction motors
IS:4691 Degree of protection provided by Enclosures for Rotating Electrical Machinery
IS:6362 Designation of methods of cooling for rotating electrical machines
IS 12065 Permissible limits of noise level for rotating electrical machines
IS 12075 Mechanical vibration of rotating electrical machines
IEC 60045-1, 5 Rotating electrical machines - Rating and performance, degrees of protection
IEC 60072 Dimension and output ratings of rotating electrical machines

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

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.
 
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
 
*** Ratings above 355kW up to 1250kW are available in frame 400 and 450. Please contact our Marketing / Sales Office for more details.
 
Conformance to Standards:
 
IS 325 Three phase Induction motors-specification
IS : 12615:2011 Energy Efficient Induction Motors - Three Phase Squirrel Cage
IEC 60034-30:2008 Efficiency classes of single speed, three phase, cage induction motors (IE code)
IS/IEC 60034-1:2010 Rotating Electrical Machines: Part 1 Rating and performance
IS/IEC 60079-0:2004 Electrical apparatus for Explosive gas atmosphere – Part 0 General Requirements
IS/IEC : 60079-1:2007 Electrical apparatus for Explosive gas atmosphere - Equipment protection by flame proof enclosures "d"
IEC :60079-15:2010 Electrical Apparatus for explosive gas atmosphere-- Construction, test & marking of type of protection "n" electrical apparatus.
IS 5572:2009 Classification of hazardous areas (other than mines) having flammable gases and vapors for electrical installations.
IS 15142:2002 Guide to the use of electrical apparatus for potentially explosive atmosphere in the presence of combustible dust.
IS 5571:2009 Guide for selection and installation of electrical equipment for hazardous areas (other than mines)
IEC 60072-1:1991 Dimension & output ratings of rotating electrical machines
IS : 900:1992 Code of practice for installation and maintenance of induction motors
IS : 1231:1974 Dimensions of foot mounted A.C induction motors
IS : 2223:1983 Dimensions of flange mounted A.C induction motors
 
 
 
 
 Energy Efficient Flame Proof Motors Ex`D'
 
Type MD 0.37kW-90kW,
Frame -80-280M. 

Type MJ, 0.37kW-200kW,
Frame 80-315L
 

Type - MD 0.37kW-90kW,
Frame -80-280M

High Efficiency 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.
Main Characteristics:
Sturdy housing which prevents an internal explosion from spreading to the outside and resists the explosion pressure
Robust bearing shields and caps bolted to the frame in such a manner that the gaps remain unaffected in the event of an internal explosion
Screen on air intake with a mesh size not exceeding 8 mm
External earth terminals
Protective earth conductor terminal in the terminal box
"Ex 'd'" mark on the motor
CIMFR certificate No., PESO and DGFASLI certificate No. and ISI Licence mark on the name plate
Special varnishing and painting treatment to resist highly corrosive atmosphere
Enclosure Design:
The frame, end shields, terminal boxes and bearing covers of all motors are made of grey cast iron. The motors are so designed that the frame temperature will remain below the ignition temperature of the gas-air mixture
Insulation:
All motors of standard design are provided with Class F insulation with temperature rise limited to Class`B'
All motors of standard design are provided with Class F insulation with temperature rise limited to Class`B'
Cooling:
All motors have bi-directional cast iron or fabricated fans
Terminal Box:
Flame Proof Motors have terminal box on the top as standard. Side terminal box can be offered on request for frame sizes 132M and above
Cable Entries :
Motors for Coal mining application (Gas Group I ) are provided with cable entries with
compound filling sealing boxes suitable for paper insulated lead covered double wired armoured (PILCDWA) PVC cables. Cable entries with flameproof cable glands can also be provided to suit PVC armoured cables. (For application in hazardous area Gas groups IIA and IIB only). Motors in all frame sizes can be supplied with termination suitable for plug and socket arrangement, against enquiry A cable sealing box is mandatory for all motors for use for Gas Group I (Coal Mines) and Gas Group II A & II B(Oil Mines)
 
 
 
 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.
Air-gap:
Radial air-gap of the motors is such that the minimum air gap values specified in IS: 6381 are fully satisfied
Enclosure:
AIncreased Safety Motors have a degree of protection IP55 in accordance with IS: 4691 as a standard feature. In addition, all flange motors (B5 and B14) have Oil Tight Shaft (OTS) protection.
Motors with V1, V5 and V18 mountings are provided with a canopy fitted on the top of the fan cowl
Winding and Rotor Cage:
The stator winding and rotor cage are so designed that the limiting temperature specified in IS: 6381 are not exceeded even at the end of time tE.
Name Plate:
Stainless steel name plate is provided with each motor. Over and above the normal name plate details, other data such as time tE, starting current, temperature-Class, type of protection, approval certification etc. are also provided.
Paint:
Acid Alkali Proof epoxy paint is provided on all motors.
Certification:
ME motors are approved by PESO, Nagpur. A declaration to this effect is incorporated on the name plate.
 
 
 
 Non Sparking Motors Ex 'N'
 
Type MN 0.12kW-90kW,
Frame -63-280M.
Type MS 0.37kW-315kW,
Frame 71-355L
 

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 TEFC Standard 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
Crane And Hoist Duty Motors
 

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
Crane And Hoist Duty Motors
 

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
 
Type MB 0.25 kW - 9.3 kW Frame - 71-132M Crane And Hoist Duty 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.

Brake motors are offered for various application requiring almost instantaneous stopping if driven with load. These motors are offered in frame size 71 to 132. Their operation is of “fail safe” type, i.e., the brake applied when, power to the motor is switched off, or, if power failure occurs.

Enclosures: (Material & T-Box location)

Frame Sizes Enclosure Materials Terminal Box Location
Standard Option Available
71-80 Aluminum Top LHS
90S-132M Cast Iron RHS TOP
   
Construction

A Brake motor is an integral combination of an
A.C induction motor and a disc type, fail safe,
electromagnetic Brake unit. It consists of following:

I) A.C. induction motor.
II) Encapsulated brake coil housed in the non
driving side end-cover.
III) Brake liner attached to the armature disc at its
interface with the cooling fan.
IV) Cooling fan.
V) The rectifier unit is provided inside the terminal box. It converts A.C. supply into D.C. supply for the brake coil.
   
Operation

Under no power condition brake springs keep the brake liner pressed against the cooling fan. This prevents rotor shaft rotation, because, the fan is keyed to it. When power is switched on, the brake coil gets energized through the Rectifier unit. It instantly attracts the armature disc by overcoming the spring force. This action results in releasing of the fan allowing the rotor to rotate freely. When the power fails or when it is switched off, the brake coil gets de-energized. This results in the springs pressing the brake liner against cooling fan, i.e. returning armature disc to its original position. This causes almost instantaneous braking of rotor. Fail safe condition is thus ensured. For applications, where total load stopping time is not very critical, A.C. side interruption can be used. However for application where faster braking is required, D.C. side interruption should be used. An additional contactor interlocked with main contactor should be used.

   
Special Features
a. Being simple and rugged in construction these motors need very little maintenance.
b.

No separate DC supply is necessary for brake coil energisation, because a rectifier unit is provided. The rectifier is open type and fixed between the two terminals inside the terminals box. Being open type, it ensures good heat dissipation and is very easy to replace. Varistor is provided across the DC terminals to protect the brake coil and rectifier against line and switching surges.

c.

Special brake liner is used, which ensures that, the braking torque value remains quite stable throughout the use. Compensation for liner wear is done by advancing the position of the fan by tightening the castle nut at the non-drive end. The design of brake motor facilitates a very easy replacement of armature disc and brake liner assembly.

d.

Since the fan serves as a braking surface (unlike some other designs), it also serves to cool the brake coil and the motor. These brake motors being fan-cooled are available in smaller frame size than other Brake motors which are surface cooled. Therefore, these motor are more compact and economical for a given application.

e. For Crane and Hoist duty application Brake motors are offered with special rotors to suit their respective duties. These rotors are specially suited for S3 and S4 duty normally encountered in Crane and Hoist application.
f.

Mechanical manual release of the brake as an optional feature is available from 90 to 132 frames. In case of power failure, the brake can be released manually with a lever.

g.

The working of the rectifier unit has been successfully type tested for one million operations. Frame Sizes Enclosure Materials Terminal Box Location Standard Option Available 71-80 Aluminum Top --- 90S-132M Cast Iron RHS LHS TOP TECHNICABRLA KIEN MOFTOORSR MATION 25

   

BREAKE MOTERS

Brake Moter
DC Brake Moter
Brake Motors Type MB Foot Mounted (B3) TEFC Series Frame 71-132M
Brake Motors Type MB Flange Mounted (B5) TEFC Series Frame 71-132M
Brake Motors Type MB Face Mounted (B14) TEFC Series Frame 71-132M
   
 
 
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