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| Three Phase Induction Motors |
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| Safe Area Motors (Motors for General Application
CGA1/D) |
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| Standard Squirrel Cage
TEFC Motors |
| Improved
Efficiency eff2. Type MA -0.12kW-90kW,
Frame 63-280M |
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Conformance to Standards
All motors comply with the following Indian and international
standards:
| IS
325 |
Three phase
Induction motors-specification |
| IS:900
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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
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| IS
12065 |
Permissible limits of noise
level for rotating electrical machines |
| IS
12075 |
Mechanical vibration of
rotating electrical machines |
| IS
12615 |
Energy Efficient
Induction motors - Three phase, squirrel cage |
| 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:
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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 |
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All motors are with degree
of protection IP55 |
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All motors up to 280M frame
are designed for 50°C ambient |
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2Z Bearings are standard
up to 180L frame which are filled with high temperature
grease suitable up to 140°C |
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On line re greasing provided
from frame 225 onwards |
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SKF or equivalent make
bearings are used and directly procured from the bearing
manufacturers |
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Terminal boxes are large
and can be rotated in steps of 90 |
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Terminal Box location can
be changed from RHS to LHS at site |
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Rotors are dynamically
balanced with half key |
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All foot mounted motors
are with integral cast feet |
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Outer bearing covers are
integral with end shield / flange |
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V Rings are used in IP55
motors and no reduction in efficiencies as compared
to IP44 motors |
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Additional anti tracking
protective coating of air drying varnish is applied
on the winding overhangs |
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Cooling fans are of aerodynamic
design resulting in low noise and are bi-directional
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Standard Motors are suitable
for mounting with any shaft orientation |
Performance chart for eff2 motors:
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| High Efficiency eff1 Squirrel
Cage TEFC Motors |
| High
Efficiency eff1. Type MH- 0.37 kW - 315
kW, Frame 71 - 355L |
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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 - eff1 Motors even in power
intensive industries gives a payback within 1 to 2 years.
View the Payback
Period Calculator here.
Salient features of Energy Efficient Motors:
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Efficiency higher or equal
to I.S. 12615 |
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Near uniform efficiency
from 50% to 100% of full load |
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Insulation class F. Temperature
rise limited to 70°C over ambient of 50°C |
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Voltage variation: ±10% |
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Frequency variation: ±5% |
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Combined variation: ±
10% |
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Enclosure: IP55 |
BEE Marking
 The
following range of BBL make General Application Energy
Efficient motors i.e. eff2 (Type MA) and eff1 (Type MH)
are covered under Bureau of Energy Efficiency's (BEE)
mark.
Efficiency Class:
As per CEMEP / IEEMA standard, motors with higher efficiency
levels have efficiency
class'eff2' (Improved efficiency) and 'eff1' (High Efficiency).
All BBL Standard Motors conform to efficiency class 'eff2'.
*** -Ratings above 355kW up to 1000kW are available in
frame 400 and 450. Please contact our Central Marketing
Office for more details.
Performance chart for eff1 motors:
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Hazardous areas are defined as locations where explosive
Gas-Air Mixture may occur in dangerous concentrations.
IS : 5572 & IS : 15142 classifies the hazardous areas
into three zones depending on the frequency and duration
for which dangerous concentrations are likely to be present.
Classification of Hazardous Areas (Gases and Vapours)
Classification of these zones and selection of electrical
equipment is as under:
| Zone |
Classification
of area as per Ref std. IS:5572 |
Selection
of electrical equipment based on Ref std. IS:5571 |
| Zone `0' |
An area in which Hazardous
atmosphere is continuously present |
Generally, use of electrical
equipment is to be avoided. But when this is not practicable,
intrinsically safe or pressurized electrical equipment
to be used. |
| Zone `1' |
Hazardous atmosphere is
likely to be present under normal operating conditions. |
For this area , electrical
equipment used , must be in flame proof enclosure
type Ex d conforming to IS : 2148. |
| Zone `2' |
Hazardous atmosphere is
likely to be present under abnormal operating conditions
and for a short periods |
Apparatus with type of
protection Ex 'e' in accordance with IS : 6381 may
be used without any special enclosure. Apparatus having
type of protection Ex `n' in accordance with IS :
8289 are also permitted for use. Three phase induction
motors having protection type Ex `n' conforming to
IS:9628 are permitted. |
Conformance to Standards:
| IS
325 |
Three phase
Induction motors-specification |
| IS:900
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Code of practice
for installation and maintenance of induction motors |
| IS
1231 |
Dimension of three-phase
foot mounted A. C. Induction motors |
| IS
: 2148 |
Specification
for Flame proof enclosure of electrical apparatus. |
| IS
: 2223 |
Dimensions of Flange mounted
A. C. Induction motors |
| IS
: 5572 |
Classification of hazardous
areas (other than mining) having flammable gases and
vapours for electrical installations) |
| IS
: 6381 |
Electrical
apparatus explosive gas -atmospheres- Increased Safety
'e' |
| IS
: 8289 |
Specification for electrical
equipment with type of Protection 'n' |
| IS
: 9628 |
Specification for 3Ph
Induction motors with type of Protection 'n' |
| IS
: 12615 |
Energy Efficient
Induction Motors-Three phase Squirrel cage. |
| IEC
60079 |
IEC 600 79 Electrical Apparatus
for explosive gas atmosphere |
| Part
- 1 |
Flame proof enclosure Ex
'd' |
| Part
- 7 |
Increased safety enclosure
Ex 'e' |
| Part
- 15 |
Non sparking enclosure
Ex 'n' |
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| Energy Efficient Flame
Proof Motors Ex`d' |
| eff2
- Type MD 0.37kW-90kW , Frame -80-280M.
eff1- Type MJ, 0.37kW-200kW, Frame 80-315L
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Improved Efficiency -eff2 - Type -MD
0.37kW-90kW , Frame -80-280M
High Type - eff1- 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: |
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Standard Motors
are designed for foot mounting (B3). These are also
suitable for B6, B7, B8, V5and V6 mounting without
any change. |
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Motors can be supplied
in flange mounting (B5). These motors will also be
suitable for V1 and V3 mounting without any change. |
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The flame proof
motors manufactured by BBL are suitable for Temperature
Class T1 to T4 as per IS 6381. |
| Main
Characteristics: |
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Sturdy housing
which prevents an internal explosion from spreading
to the outside and resists the explosion pressure
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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 |
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Screen on air intake with
a mesh size not exceeding 8 mm |
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External earth terminals
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Protective earth conductor
terminal in the terminal box |
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"Ex 'd'" mark
on the motor |
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CIMFR certificate No.,
PESO and DGFASLI certificate No. and ISI Licence mark
on the name plate |
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Special varnishing
and painting treatment to resist highly corrosive
atmosphere |
| Enclosure
Design: |
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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
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| Insulation:
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All motors
of standard design are provided with Class F insulation
with temperature rise limited to Class`B' |
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All motors
of standard design are provided with Class F insulation
with temperature rise limited to Class`B' |
| Cooling:
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All motors
have bi-directional cast iron or fabricated fans |
| Terminal
Box: |
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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 : |
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Motors for 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 and Oil Mines |
Performance chart for Improved efficiency eff2 Flame
Proof Motors:
Performance chart for High efficiency eff1 Flame Proof
Motors:
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| Increased Safety Motors
Ex 'e' |
| eff2
- Type ME 0.12kW - 90kW, Frame -63-280M
. eff1- Type MI, 0.37kW-315kW, Frame 71-355L
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Improved Efficiency -eff2 - Type -ME
0.12kW - 90kW, Frame -63-280M
High Type - eff1- 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: |
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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: |
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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. |
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Terminal Boxes
in frame sizes 63 to 355L can be rotated through 360°
in steps to 90° to suit the cable location. |
| Air-gap:
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Radial air-gap
of the motors is such that the minimum air gap values
specified in IS: 6381 are fully satisfied |
| Enclosure:
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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. |
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Motors with
V1, V5 and V18 mountings are provided with a canopy
fitted on the top of the fan cowl |
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Winding and Rotor Cage: |
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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. |
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Name Plate: |
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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: |
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Acid Alkali
Proof epoxy paint is provided on all motors. |
| Certification: |
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ME motors are
approved by PESO, Nagpur. A declaration to this effect
is incorporated on the name plate. |
Performance chart for Improved efficiency eff2 Increased
Safety Motors:
Performance chart for High efficiency eff1 Increased
Safety Motors:
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| Non Sparking
Motors Ex 'n' |
| eff2
- Type MN 0.12kW-90kW , Frame -63-280M.
eff1- Type MS, 0.37kW-315kW, Frame 71-355L
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Improved Efficiency -eff2 - Type -MN
0.12kW-90kW , Frame -63-280M
High Type - eff1- 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:
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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. |
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The surface temperature
does not exceed 200°C i.e. Temperature class T3 |
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The Terminal Box has degree
of protection IP55 |
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A drain plug is provided
on the end shields to remove condensed water |
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The terminal plate is of
a special design such that the terminals are protected
against loosening under vibrations |
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The radial air gap of the
motors is such that the minimum air gap values specified
in IS: 6381 are fully satisfied |
Performance chart for Non Sparking Motors:
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| Crane Duty and Brake Motors |
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| Crane and Hoist
Duty Motors |
| Type
MC, 0.37 kW - 400 kW, Frame - 71-355L
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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.
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| TEFC Slip Ring
Motors |
| Type
MP 1.30 kW-11.5 kW (4P, 6P) Frame - 71-355L
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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.
Performance chart for Slip Ring Motors:
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| Brake Motors
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| Type
MB 0.25 kW - 9.3 kW Frame - 71-132M |
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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.
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