Load Break Switches
About us
Larsen & Toubro is a technology-driven USD 8.5 billion company
that infuses engineering with imagination. The Company offers a
wide range of advanced solutions in the field of Engineering,
Construction, Electrical & Electronics, Machinery and Information
Technology.
L&T Switchgear, which forms part of the Electrical & Automation
business, is India's largest manufacturer of low voltage
switchgear, with the scale, sophistication and range to meet global
benchmarks. With over four decades of experience in this field,
the Company today enjoys a leadership position in the Indian
market with growing presence in international markets.
It offers a complete range of products including controlgear,
powergear, motor starters, energy meters, wires and host of other
accessories. Most of our product lines conform to international
standards, carry CE markings and are
certified.
L&T now introduces compact range of 'Load Break Isolators' to
suit the needs of Isolation for every safety needs.
Switchgear Factory, Mumbai
Contents
Technical Data
1
Switching Programmes
2
Front Mounting
3
Rear Mounting
5
Plastic Enclosure Mounting
7
Metal Enclosure Mounting
8
Accessories
10
Changeover Switches
13
Enclosure Changeover Switches
15
Product Ordering Code
16
Technical Data
CSA Standard
CAN/CSA-C22.2 N0.14-M91
UL Standard
Ul508
European Standard
IEC947-1 and 3, EN60947, VDE 0660-107
Rating
Measure
LB116 LB120
LB225
LB232 LB240
LB263 LB4080 LB4100 LB4125
Rated Operational Voltage, Ue
IEC/EN/VDE
Volts
V
690
690
690
690
690
690
690
690
690
UL/CSA
Volts
V
600
600
600
600
600
600
600
600
600
Main Switch: Isolating Voltage Upto
Volts
V
750
750
750
750
750
750
750
750
750
Resistance to Surge Pulse
Voltage, Uimp
Volts
kV
6
6
6
6
6
6
6
6
6
Rated Uninterrupted Current, Iu
Amp
A
16
20
25
32
40
63
80
100
125
Rated Operational Current, Ie
AC22
Amp
A
16
20
25
32
40
63
80
100
125
IEC/EN/VDE AC-21A IEC/EN/VDE
Amp
A
16
20
25
32
40
63
80
100
125
Amp
A
20
25
32
40
63
80
80
100
125
Amp
A
16
20
25
32
40
63
80
100
125
AC-1
UL/CSA
Rated Operational Power at 50 to 60Hz (IEC/EN/VDE)
220-240V
kW
AC-23A,
380-440V
kW
3 Phase, 3 Pole
500-690V
kW
IEC/EN/VDE
220-240V
kW
AC-3,
380-440V
kW
3 Phase, 3 Pole
500-690V
kW
Short Circuit Capacity (IEC/EN/VDE)
Max. Fuse Size (Type gL)
Amp
A
Rated fused short circuit current
Amp
kA
3
4
5.5
7.5
11
15
18.5
22
30
5.5
7.5
11
15
18.5
30
30
37
45
7.5
11
11
15
22
30
37
45
55
2
3
4
5.5
7.5
11
15
18.5
22
3
5.5
7.5
11
18.5
22
22
30
37
5.5
7.5
11
11
18.5
22
30
37
45
16
5
25
5
25
30
32
30
40
30
63
30
80
30
100
30
125
30
3
5
7.5
5
7.5
7.5
7.5
10
15
10
15
15
UL/CSA Power Rating: Manual Motor Controller, Suitable as Disconnect
1
1
120V
HP
3
3 Phase, 3 Pole
240V
HP
3
3
7.5
480V
HP
7.5
7.5
15
20
20
25
30
30
40
600V
HP
10
10
20
25
30
30
40
40
50
120V
HP
0.5
0.5
1.5
2
3
3
3
3
3
240V
HP
1.5
1.5
2
3
4
7.5
7.5
7.5
10
Max. Fuse Size
Amp
A
25
25
50
50
70
70
100
100
125
Fuse Rating, J Type
Rated Fused Short Circuit Current
Terminal Cross Section
Amp
Amp
A
kA
20
10
20
10
45
10
45
10
70
10
70
10
90
10
90
10
90
10
Min-mm2
1.5
1.5
1
1
4
4
6
6
6
Max-mm2
6
6
10
10
16
16
70
70
70
DOL
1 Phase
Short Circuit Capacity (UL/CSA)
Single/Multiple Strand Wire
1
Min-mm2
0.5
0.5
0.75
0.75
2.5
2.5
4
4
4
Fine-Strand Wire with Sleeve
Max-mm2
6
6
6
6
10
10
50
50
50
American Wire Guage
-
AWG
12
12
8
8
6
6
1
1
1
Recommended Tightening
Torque
-
Nm
0.8
0.8
1.7
1.7
1.7
1.7
2.5
2.5
2.5
Switching Programmes
Switches : LB225, LB232, LB240, LB263, LB4080, LB4100, LB4125
1/L1 3/L2 5/L3
1/L1 3/L2 5/L3
7
9
2/T1
2/T1
8
10 2/T1
4/T2 6/T3
4/T2 6/T3
3 Pole +
1 Main Module
3 Pole
1/L1 3/L2 5/L3
4/T2 6/T3
7
1/L1 3/L2 5/L3 1/L1 3/L2 5/L3
7
1/L1 3/L2
8
2/T1
8
2/T1
4/T2 6/T3 2/T1 4/T2 6/T3
4 Pole +
1 Main Module
5/L3 3/L2 5/L3 3/L2
7
4/T2 6/T3 4/T2 6/T3 4/T2
8
6 Pole
8 Pole
OFF
ON
31300
31400
31500
31600
31800
31309
31409
31509
31609
31809
ON
OFF
1/L1 3/L2 5/L3
N
N 1/L1 3/L2 5/L3 7
1/L1 3/L2 5/L3 13 21
13 21 1/L1 3/L2 5/L3 7
N
1/L1 3/L2 5/L3
N
13 21 1/L1 3/L2 5/L3 13 21
2/T1
N
N 2/T1 4/T2 6/T3 8
2/T1 4/T2 6/T3 14 22
14 22 2/T1 4/T2 6/T3 8
N
2/T1 4/T2 6/T3
8
14 22
4/T2 6/T3
2/T1 4/T2 6/T3 14 22
3 Pole+
1 Neutral
Module
4 Pole+
1 Neutral
Module
3 Pole+
1 Auxillary
Module
4 Pole+
1 Auxillary
Module
3 Pole+
2 Neutral
Modules
3 Pole+
2 Auxillary
Modules
31310
31410
31320
31420
31330
31340
31319
31419
31329
31429
31339
31349
OFF
ON
ON
OFF
Note: 6P and 8P for LB116 and LB120 are under development. Please refer to us
Switches: LB4080, LB4100, LB4125
1/L1 3/L2 5/L3
1/L1 3/L2 5/L3
7
2/T1
2/T1
8
4/T2 6/T3
4/T2 6/T3
1/L1 3/L2
5/L3
7
1/L1 3/L2
5/L3 1/L1 3/L2 5/L3
7
1/L1 3/L2
5/L3 3/L2 5/L3 3/L2
7
10 2/T1 4/T2
6/T3
8
2/T1 4/T2 6/T3 2/T1 4/T2 6/T3
8
2/T1 4/T2 6/T3 4/T2 6/T6 4/T2
8
9
ON
31309
OFF
31409
31509
31609
31809
1/L1 3/L2 5/L3
N
N 1/L1 3/L2 5/L3 7
1/L1 3/L2 5/L3 13 21
13 21 1/L1 3/L2 5/L3 7
N
1/L1 3/L2 5/L3
N
13 21 1/L1 3/L2 5/L3 21 13
2/T1
N
N 2/T1
2/T1 4/T2 6/T3 14 22
14 22 2/T1 4/T2 6/T3 8
N
2/T1 4/T2 6/T3
N
14 22 2/T1 4/T2 6/T3 22 14
31329
31429
4/T2 6/T3
4/T2 6/T3 8
ON
OFF
31319
31419
31339
31349
2
Front Mounting
16A-20A
16
30
Ø12
57
B03
36SQ
46
3 mm
Panel Gap
Fifth Pole
l
can be
fitted on the other
side of the switch
4 Hole front panel mounting
n
Degree of protection : Front IP55
n
16A-20A
16
57
B19
Ø4.5
Panel Plate
SQ48
46
31.7
SQ48
100
n
Dia 22.5 mm, single hole panel mounting
n
Degree of protection : Front IP55
Shackle size
min. 2 mm, max. 6 mm
16A-20A
Ø12
16
31
57
B40
36SQ
Ø4.5
Panel Plate
3 mm
Panel Gap
46
SQ48
4 Hole, front panel mounting
n
Degree of protection : Front IP55
n
Switch with padlockable flag knob
n
Maximum 1 padlock
n
25A-63A
l
Fifth Pole
3 (max)
Panel Gap
30
18
50
18
can be
fitted on the other
side of the switch
Ø12
72
15
B13
4
56
SQ64
4 Hole front panel mounting
n
Degree of protection : Front IP55
n
3
All dimensions in mm.
Fourth
Pole
SQ48
Panel Plate
Ø4.5
B30
25A-63A
15
3 (max)
Panel Gap
23
30
75
50
18
Ø5.5
Ø12
can be
fitted on the other
side of the switch
102
72
l
Fifth Pole
13.5
4
56
Panel Plate
n
Padlocking device to prevent the
n
4 Hole front panel mounting
n
Degree of protection : Front IP55
n
Switch with rectangular
B33
SQ48
Fourth
Pole
SQ64
Switch from being switched ON by
unauthorised personnel
Max 4 padlocks
n
25A-63A
50
15
18
23
3 max
Ø4.5
Ø12
can be
fitted on the other
side of the switch
72
l
Fifth Pole
4
SQ64
64
Fourth
SQ36
Pole
Panel Plate
4 Hole front panel mounting
n
Degree of protection : Front IP65
n
B63
n
Switch with round padlocking device to
prevent from being switched ON by
unauthorised personnel
Max 3 padlocks
n
25A-63A
15
3 (max)
30
50
18
SQ48
Panel Gap
Ø5.5
72
Ø12
l
Fifth Pole
can be
fitted on the other
side of the switch
43.5
Fourth
72
SQ64
Ø23
Pole
Panel Plate
4 Hole front panel mounting
n
Degree of protection : Front IP55
n
Knob operated, keylock, key removable
n
in OFF position (Other options on request)
All dimensions in mm.
4
Rear Mounting
25A-63A
15
B23
Suitable for
50
18
46
72
35
65
M4 Screw
52.5
Mounting
Rail
24
62.5
Fourth Pole
80A-125A
SQ48
Alternate Fixing
Arrangement
2 Hole rear mounting
n
Alternately snap mounting on
n
Mounting
Rail
84
104
35
94
25
DIN EN50022 rail (35 mm)
Degree of protection : Front IP30
n
MB42
36
To Suit
M5 Screw
102
73
16A-20A
16
ON
O
F
F
72
57
64
35
36
Mounting Rail
47
To Suit M4 Screw
SQ48
3 mm
204
Panel Gap
25A-63A
2 Hole rear mounting or snap
n
Alternative Fixing
Arrangement
50(L)
18
37.5
Lock Screw
18
3(max)
Panel Gap
156
Ø4.5
Ø12
O
F
F
72
65
ON
35
mounting on DIN EN50022
rail (35mm) and can be operate
from the front (door) - coupled with
door mechanism
Door interlock (Door openable only
n
in OFF position)
Degree of protection : Front IP55
n
SQ48
Mounting
85
To Suit
M4 Screw
Rail
Panel Door
355
64
Fourth Pole
80A-125A
Alternate Fixing
Arrangement
Lock Screw
37.5
Ø4.5
Ø12
5
All dimensions in mm.
94
35
Mounting
Rail
104
84
I
25
To Suit
M5 Screw
O
338
Panel Gap
5(max)
SQ.64
SQ.48
Panel Door
MB34
16A-20A
16
35
Mounting
Rail
Ø12
64
72
57
ON
36
O
F
F
SQ36
47
3 mm
204
To Suit M4 Screw
Ø4.5
Panel Plate
SQ48
Panel Gap
25A-63A
Lock Screw
18
15
Suitable for
3 max
Panel Gap
M4 Screw
2 Hole rear mounting or snap
n
35
18
Ø4.5 Ø12
65 72
85
Mounting
SQ36
SQ64
355
Rail
Fourth Pole
Panel Door
80A-125A
Alternate Fixing
Arrangement
Panel Door
Lock Screw
3(max)
42
O
F
F
SQ64
84
25
104
Panel Gap
94
Ø4.5
35
Ø12
SQ36
mounting on DIN EN50022 rail
(35mm) and can be operate
from the front (door) coupled with
door mechanism
Door interlock (door openable
n
only in OFF position)
Degree of protection : Front IP65
n
Rigid metal shaft/switch assembly
n
Switch with round padlocking
n
device to prevent the Switch from
being made ON by unauthorised
persons
Max.3 padlocks as under :
n
16A-20A: Max. 1 padlock
25A-63A: Max. 2 padlocks
80A-125A: Max. 3 padlocks
50
42
Mounting Rail
To Suit
M5 Screw
77.5
338
Adjustable mounting by cutting the metal shaft to appropriate
n
length, to suit panel height
Specific Length of shaft can be offered on request
n
All dimensions in mm.
6
Plastic Enclosure Mounting
16A-20A
115
Knockout ( Ø16mm)
-2 Places
125
B31SM
72
100
Knockout -M20(4 Places)
SQ80
Suitable for M4 Screw
25A-32A
Knockout ( Ø16mm)
-2 Places
125
115
OFF
Switch mounted in ABS /
n
polycarbonate (optional) enclosure
Round padlocking device
n
(Max.3 padlocks) to prevent the
Switch from being made to ON
by unauthorised personnel
Knob version available on request
n
Switch rear mounted for easy
n
connection
Degree of protection : IP65
n
Red / Yellow-handle colour for Main / Emergency Switches
n
Enclosure colour : Dark grey base and light grey cover
n
Fourth pole can be added
n
B31M
40A-63A
72
100
42
Knockout -M20(4Places)
SQ80
Suitable for M4 Screw
125
155
175
ON
ø4.5
90
42
Suitable for
M4 Screw
Knockout -M25
4 Places
Red / Yellow-handle Colour For
n
n
Round padlocking device
n
Switch mounted in ABS enclosure,
optional in polycarbonate
B31L
105
(Max.3 padlocks) to prevent
the Switch from being made
to ON by unauthorised personnel
Degree of protection : IP65
n
Switch rear mounted for easy
n
connection
Main / Emergency Switches
Enclosure colour : Dark grey
n
baseand light grey cover
Fourth and Fifth pole can be added
n
80A-125A
33
33
ø25-4Nos.
(Both side)
130
168
ø6.5
280
258
ON
190
n
Padlocking device (Max.3 padlocks)
n
Switch mounted in ABS /
polycarbonate (optional) enclosure
7
All dimensions in mm.
to prevent the Switch from being
made to ON by unauthorised
personnel
Degree of protection : IP65
n
Switch rear mounted for easy
n
connection
Red / Yellow-handle Colour For
n
Main / Emergency Switches
Interlock provided to open the
n
lid only in OFF position
Enclosure colour : Grey
n
Fourth and fifth pole can be added
n
Metal Enclosure Mounting
AB31S
Upto 25A
Suitable for M5 Screw
74
44
80
108
ON
92
25
Ø20-2 Places
Caution : Open the cover only in 'OFF' position
n
Switch mounted in aluminium
enclosure
n
Round padlocking device (max. 3
padlocks) to prevent the Switch
AB31S - IP65
from being made to ON by
unauthorised personnel
n
Degree of protection : IP53*
n
Red / Yellow-handle Colour for
Main / Emergency Switches
n
Enclosure colour : Dark grey base
and light grey cover
25-32A
Ø20 Knockout Holes
92
Suitable for ØM5
0
80
80
108
1
25
74
53
n
Switch mounted in aluminium
enclosure
Degree of protection : IP65
n
AB31M
32A-63A
Suitable for M4 Screw
120
125
44
130
216
ON
160
1"BSP (3 Places)
Caution : Open the cover only in 'OFF' position
n
Switch mounted in aluminium
enclosure
Round padlocking device (max. 3
n
padlocks) to prevent the Switch
from being made to ON by
unauthorised personnel
n
Degree of protection : IP53*
n
Red / Yellow-handle Colour for
Main / Emergency Switches
n
Enclosure colour : Dark grey base
and light grey cover
Fourth pole can be added
n
* IP65 protection class products available on request.
All dimensions in mm.
8
Metal Enclosure Mounting
SB31S
Upto 25A
Ø6.5-2 Places
147
120
ON
70
44
80
110
Ø20-2 Holes
Caution : Open the cover only in 'OFF' position
n
Switch mounted in Steel enclosure
n
Round padlocking device (max. 3
padlocks) to prevent the Switch
from being made to ON by
unauthorised personnel
SB31M
n
Enclosure colour : Dark grey base
n
Degree of protection : IP53*
n
Knob version available on request
n
Red / Yellow-handle Colour for
and light grey cover
Main / Emergency Switches
32A - 63A
Ø6.5-2 Places
85
44
180
220
ON
100
135
Ø20-2 Holes
Caution : Open the cover only in 'OFF' position
padlocks) to prevent the Switch
from being made to ON by
unauthorised personnel
n
Enclosure colour : Dark grey base
and light grey cover
Fourth pole can be added
n
Main / Emergency Switches
80A-125A
Ø8-4 Places
315
SB31L
Degree of protection : IP53
n
Knob version available on request
n
Red / Yellow-handle Colour for
n
125
50
272
Switch mounted in Steel enclosure
n
Round padlocking device (max. 3
n
200
245
Ø20-3 Holes
Caution : Open the cover only in 'OFF' position
Switch mounted in Steel enclosure
n
Round padlocking device (max. 3
n
padlocks) to prevent the Switch
from being made to ON by
unauthorised personnel
9
All dimensions in mm.
Degree of protection : IP53
n
Knob version available on request
n
Red / Yellow-handle Colour for
n
Main / Emergency Switches
Enclosure colour : Dark grey base
n
and light grey cover
Fourth pole can be added
n
Accessories
Add on Main Pole
(16A-63A)
For
Code for Code for
Switch
Front
Rear
Code Mounting Mounting
Switch
Switch
For
Code for Code for
Switch
Front
Rear
Code Mounting Mounting
Switch
Switch
LB116
LB225
LB120
LB120
FMC20
LB120
RMC20
LB232
LB240
24.5
57
n
Equivalent switch electrical rating
n
Used as 4th/5th pole on either side
LB232
RMC32
LB263
FMC63
LB263
RMC63
28
33
17.25
LB263
LB232
FMC32
16
39
of the switch
18
72
Add on Main Pole
(80A-125A)
For
Switch
Code
Code for Code for
Rear
FM
Mounting Switch
Switch
58
LB4080
LB4100
42
LB4125
FMC125
44.3
LB4125
LB4125
RMC125
Equivalent switch electrical rating
n
Used as 4th/5th pole on either side
n
of the switch
84
22
Applications
For switching action of additional pole, when mounted with the
switch. The additional pole on either side of the switch can be
used to switch on any single phase requirements simultaneously.
Add on Neutral Pole
(16A-63A)
For
Code for Code for
Switch
Front
Rear
Code Mounting Mounting
Switch
Switch
LB116
LB120
LB120
FNC20
LB120
RNC20
For
Code for Code for
Switch
Front
Rear
Code Mounting Mounting
Switch
Switch
LB225
LB232
LB240
24.5
LB263
LB232
FNC32
LB232
RNC32
LB263
FNC63
LB263
RNC63
Early make late break contact
n
Can be fitted on either side of
n
the switch
57
39
33
17.25
28
16
72
Applications
18
To be used as Neutral Conductor to the switch.
All dimensions in mm.
10
Accessories
Add-on Neutral Pole
(80A-125A)
For Switch
Code
Code for Rear
Code for Front
Mounting Switch Mounting Switch
LB4080
LB4125
RNC125
LB4100
LB4125
FNC125
LB4125
58
42
44.3
n
Early make late break contact
Can be fitted on either side of
n
the switch
Applications
To be used as Neutral Conductor
to the switch
22
84
Add-on Auxiliary Pole
LB120
LB120
FAC16
LB120
RAC16
19
34
LB116
Code for LB116-LB120
24.5
Rear
Mounting
Switch
17.25
For Switch Code for
Code
Front
Mounting
Switch
57
LB225
21
13
LB232
LB240
n
1 NO contact early break / late
LB263
make + 1 NC contact
n
Can be fitted on either side of
the Switch
LB4080
LB263
RAC16
22
14
LB4100
LB4125
FAC16
60
18
LB4125
Rating
LB4080-LB4125
American Wire Gauge
72
6A
4A
46.5
AC-15
16A, 500V
220-240V
380-440V
min. mm²
max. mm²
AWG
1.0
1.5
16
44.5
IEC / EN
Single/Multiple strand wire
All dimensions in mm.
26
LB4125
RAC16
Terminal Cross Section
11
LB225-LB263
41
Applications
Auxiliary contact module has two
contacts, 'NO and NC'. 'NO'
contact is early break, late make
contact. This is used to trigger
any auxiliary circuits.
LB263
FAC16
21
Knobs & Handles
Code
Type
TD
Tear Drop
Knob
17
25
41
27
1
TD
TD
21
A
B
C
D
27
36
41
52
25
31
21
25
RD
Round Knob,
Padlockable
RH
Roll Handle,
Padlockable
SH
Short
Handle,
Padlockable
LH
Leech
Handle,
Padlockable
CG
CGL Handle,
Padlockable
51
Ø66
Flag Knob
FL
FL
24
1
A
B
C
D
27
36
39
50
24
27
24
25
125
39
FL
24
Type
39
27
27
Flag Knob
Padlockable
PG
Pistol Grip
Handle
65
FP
Ø66
45
39
24
Code
SQ64
24
36
SQ88
71
102
1
0
0
51
60
40
67
87
36
Ball Grip
Handle
BG
36
LB Switches: Knob/Handle and Mounting Options
Mounting
LB116
1
1
FL , TD
B03
LB120
1
1
FL , TD
FP, FL1, TD1 FP, FL1, TD1
B19
FP
B40
B13
LB225
LB232
LB240
LB263
LB4080
LB4100
LB4125
FL,TD
FL,TD
FL,TD
FL,TD
-
-
-
-
-
-
-
-
-
-
FP
-
-
-
-
-
-
-
-
FL,
PG, BG
FL,
PG, BG
FL,
PG, BG
FL,
PG, BG
FL
PG,BG
FL
PG,BG
FL
PG,BG
-
B30
-
-
TD, FL
TD, FL
TD, FL
TD, FL
FL
FL
FL
B33
-
-
RD
RD
RD
RD
RD
RD
RD
B63
-
-
TD, FL
TD, FL
TD, FL
TD, FL
FL
FL
FL
B23
-
-
TD, FL
TD, FL
TD, FL
TD, FL
FL,BG
FL,BG
FL,BG
MB34
FP
FP
MB42
FL1
FL1
BG, PG,
BG, PG,
BG, PG,
BG, PG,
BG, PG,
BG, PG,
AB31S,SB31S
RD
RD
RD
RD
RD
RD
-
-
-
B31SM
FP
FP
RD
RD
RD
RD
-
-
-
B31M,AB31M,SB31M
-
-
RD
RD
RD
RD
-
-
-
B31L
-
-
-
-
-
-
RD, LH,
BG, RH
RD, LH,
BG, RH
RD, LH,
BG, RH
SH, RD, CG SH, RD, CG SH, RD, CG SH, RD, CG SH, RD, CG SH, RD, CG SH, RD, CG
LH, RH
LH, RH
LH, RH
LH, RH
LH, RH
LH, RH
LH, RH
BG, PG,
The knobs/handles highlighted in red are standard, others indicates possible options.
LB Switches: Knob/Handle, Enclosure Mounting Options
Enclosure
Mounting
B31SM
B31M
B31L
SB31S
SB31M
SB31L
AB31S
AB31M
Knob/Handle
RD, FP
RD
RD, LH
RD, BG,
PG, LH
RD, LH
BG, PG
LH, BG
PG, RD
RD, FL
BG, PG
RD, LH
BG, PG
The knobs/handles highlighted in red are standard, others indicates possible options.
All dimensions in mm.
12
Changeover Switches
Switching Programmes
Code : 31153 3 Pole Changeover
R
Y
B
R
Y
Code : 31154 4 Pole Changeover
B
O
I
II
I
R
Y
B
N
X
X
X
X
R
Y
B
N
X
X
X
X
O
I
X
X
O
II
X
II
I
O
X
X
X
II
Features
n
25A - 125A, 3 and 4 Pole, AC 23 duty
n
Available with and without SS enclosure
B13
Different mounting options
n
Excellent switching performance
n
High short circuit capacity
n
n
Door interlock and padlock available
n
Provides adequate space for cable
termination and very convenient for
installation termination
25A-63A, Front Mounting
37.5
18
100.5
Ø4.5
Ø12
3 (max)
64
72
0
1
2
248
4
Panel Door
67.5
n
4 Hole front panel mounting
B21
n
Degree of protection : Front IP55
25A-63A, Rear Mounting
Ø64
Ø12
Ø4.5
Alternative Fixing
Arrangement
72
65
35
0
I
II
50.5
Mounting
Rail
Ø48
To suit M4 Screw
Panel door
77
80A-125A, Rear Mounting
Alternate Fixing
Arrangement
Mounting
Rail
72.5
84
104
O
25
94
35
25
145
I
II
To Suit
M5 Screw
146
n
4 Hole rear mounting
13
All dimensions in mm.
n
Degree of protection : Front IP55
25A-63A, Rear Mounting
MB42
Lock Screw
Alternative Fixing
Arrangement
ø64
3(max)
Panel Gap
ø12
ø4.5
Mounting
Rail
72
35
65
0
2
1
50.5
SQ 46
To Suit
M4 Screw
97
Panel Door
183
80A-125A, Rear Mounting
ø4.5
ø17
Lock Screw
Panel Door
1
SQ48
0
80
104
84
12.5
To Suit
M4 Screw
2
6.5
220
182
25
3
Panel Gap
12.5
25A-63A, Rear Mounting
MB34
Lock Screw
Mounting
Rail
ø64
3(max)
Panel Gap
ø12
ø4.5
72
65
35
Alternative Fixing
Arrangement
50.5
SQ36
To Suit
M4 Screw
97
Panel Door
183
80A-125A, Rear Mounting
220
25
ø4.5 Panel
Door
SQ36
80
6.5
ø17
Lock Screw
104
84
125
To Suit
M4 Screw
182
3
Panel
Gap
145
2 Hole rear mounting or snap mounting on DIN EN50022 rail (35 mm) and operable from the front (door)
n
coupled with door mechanism
Door interlock (door operable only in OFF position)
n
Degree of protection : Front IP65
n
Rigid metal shaft/Switch assembly
n
Switch with round padlocking device to prevent the Switch from being made ON by unauthorised persons
n
Max. 3 padlocks
n
Adjustable mounting by cutting the metal shaft to appropriate length to suit panel height
n
Specific length of shaft can be offered on request
n
All dimensions in mm.
14
Enclosure Changeover Switches
Features
25A - 125A, 4 Pole, AC 23 duty
n
Range available : 3 Pole Changeover - 31153, 3 Pole + Neutral Pole Changeover - 31154
n
n
Powder coated steel enclosure with separate earthing or IP65, ABS enclosure having interlock
to open the lead only in OFF position for safety
Colour : Yellow front plate and Red ball grip handle
n
B31L
25A-63A
33
33
Ø25-4Nos.
(Both Side)
130
168
Ø6.5
258
280
0
1
190
n
Switch mounted in grey ABS / Polycarbonate optional enclosure
with IP65 protection and interlock provided to open the lid in OFF position
SB31
25A-63A
66
37.5
117
160
0
270
1
Earthing
Screw
250
172
Hole Suitable for
M5-Screw-4 Nos.
(for Fixing purpose)
30
Ø26-2 Nos. (Both Side)
Knock Open Type
Powder coated steel enclosure
n
Interlock provided to remove cover only in ‘OFF’ position for safety
n
n
Separate earthing provided
n
Colour : Yellow front plate and Red ball grip handle / grey front plate and
Black ball grip handle
SB31XL
80A-125A
Ø25-6 Nos. (Both Side)
42
130
42
185
0
370
205
1
250
Earth
Powder coated steel enclosure
n
Separate earthing provided
n
Interlock provided to remove cover only in ‘OFF’ position for safety
n
Colour : Yellow front plate and Red ball grip handle / grey front plate
n
and Black ball grip handle
15
All dimensions in mm.
Changeover Switches: Knob/Handle and Mounting Options
Mounting
LB225
LB232
LB240
LB263
LB4080
LB4100
LB4125
B13
PG, BG
PG, BG
PG, BG
PG, BG
-
-
-
MB34
RD
RD
RD
RD
RD
RD
RD
MB42
PG, BG
PG, BG
PG, BG
PG, BG
PG, BG
PG, BG
PG, BG
B21
BG, PG
BG, PG
BG, PG
BG, PG
PG, BG
BG, PG
BG, PG
SB31
BG, PG
BG, PG
BG, PG
BG, PG
-
-
-
-
-
BG, PG
BG, PG
BG, PG
-
-
-
SB31XL
-
-
B31L
RD, BG
RD, BG
RD, BG, PG RD, BG, PG
The knobs/handles highlighted in red are standard, others indicates possible options.
Product Ordering Code
Load Break and Changeover Switches
LB
XXXX
Load
Break
Switch
Switch
Rating
XXXXX
XXXXX
XX
XX
Programme Code
Mounting Options
Knob Options
Colour
Example
LB Switches, 25A, 3P, 9 O'clock, 4
hole front mounting, yellow front
plate, red tear drop knob
LB Switches, 63A, 3P, 9 O'clock, 4
hole front mounting, with metal shaft,
yellow front plate, red round knob
LB Switches 40A, 3P, 12 O'clock off
in B31SM enclosure, grey front
plate, black round knob
LB Changeover Switch, 63A,
3P, metal enclosure with
interlock, yellow front plate,
red ball grip handle
LB 225 31309
B13
TD YR
LB 263 31309 MB34 RD YR
LB 263 31309 MB34 RD YR
LB 240 31300 B31SM RD GB
LB 263 31153 SB31 BG YR
Accessories
R NC
X
XX
F-Front Mounting
MC-Main Module
R-Rear Mounting
NC-Neutral Module
Yellow Front Plate/
Red Knob
64 x 64 Front Plate
Round Knob with
Padlock (R)
Metal Shaft with
Round Knob with
Padlock and Interlock
3Pole 9 O' Clock "OFF"
63A
Load Break Switch
XXX
32
32A
20 - 16A to 20A
32 - 25A to 32A
63 - 40A to 63A
80 - 80A
125 - 100A,125A & 80A
Neutral Module
Rear Mounting
AC-Auxiliary Module
Product improvement is continuous process. Hence, data given in this catalogue is subject to
change without intimation. Please acertain Product Certification and Listing.
16
Electrical Standard Products (ESP) Branch Offices:
REGISTERED OFFICE AND
HEAD OFFICE
L&T House, Ballard Estate
P. O. Box 278
Mumbai 400 001
Tel: 022-6752 5656
Fax: 022-6752 5858
Website: www.Larsentoubro.com
ELECTRICAL STANDARD PRODUCTS (ESP)
501, Sakar Complex I
Opp. Gandhigram Rly. Station
Ashram Road
Ahmedabad 380 009
Tel: 079-66304007-11
Fax: 079-26580491 / 66304025
e-mail: esp-ahm@LNTEBG.com
38, Cubbon Road, Post Box 5098
Bangalore 560 001
Tel: 080-25020100, 25593613
Fax: 080-25580525
e-mail: esp-blr@LNTEBG.com
131/1, Zone II
Maharana Pratap Nagar
Bhopal 462 011
Tel: 0755-4098706 / 7 / 8 / 9
Fax: 0755-2769264
e-mail: esp-bho@LNTEBG.com
Plot No. 559, Annapurna Complex
Lewis Road
Bhubaneswar 751 014
Tel: 0674-6451342, 2436696
Fax: 0674-2537309
e-mail: esp-bbi@LNTEBG.com
SCO 32, Sector 26-D
Madhya Marg, P. O. Box 14
Chandigarh 160 026
Tel: 0172-4646841 to 7
Fax: 0172-4646802
e-mail: esp-chd@LNTEBG.com
10, Club House Road
Chennai 600 002
Tel: 044-28462072 / 4 / 5 / 2109
Fax: 044-28462102 / 3
e-mail: esp-maa@LNTEBG.com
67, Appuswamy Road
Post Bag 7156
Opp. Nirmala College
Coimbatore 641 045
Tel: 0422-2588120 / 1 / 5
Fax: 0422-2588148
e-mail: esp-cbe@LNTEBG.com
L&T House, Group MIG - 5
Padmanabhpur
Durg 491 001
Tel: 0788-2213833 / 14 / 28 / 29
Fax: 0788-2213820
A1/11, Astronauts Avenue
Bidhan Nagar
Durgapur 713 212
Tel: 0343-2536891 / 8952 / 7844
Fax: 0343-2536493
e-mail: esp-dgp@LNTEBG.com
Milanpur Road, Bamuni Maidan
Guwahati 781 021
Tel: 0361-2651297
Fax: 0361-2551308
e-mail: esp-gau@LNTEBG.com
II Floor, Vasantha Chambers
5-10- 173, Fateh Maidan Road
Hyderabad 500004
Tel: 040-66720250
Fax: 040-23296468
e-mail: esp-hyd@LNTEBG.com
D-24, Prithvi Raj Road, C-Scheme
Jaipur 302 001
Tel: 0141-2385916 / 8
Fax: 0141-2373280
e-mail: esp-jai@LNTEBG.com
Akashdeep Plaza, 2nd Floor
P. O. Golmuri
Jamshedpur 831 003
Jharkhand
Tel: 0657-2340864 / 387
Fax: 0657-2341250
e-mail: esp-jam@LNTEBG.com
Skybright Bldg. M. G. Road
Ravipuram Junction, Ernakulam
Kochi 682 016
Tel: 0484-4409420 / 4 / 5 / 7
Fax: 0484-4409426
e-mail: esp-cok@LNTEBG.com
3-B, Shakespeare Sarani
Kolkata 700 071
Tel: 033-44002572 / 3 / 4
Fax: 033-22822589
e-mail: esp-ccu@LNTEBG.com
A28,Indira Nagar, Faizabad Road
Uttar Pradesh,
Lucknow 226 016
Tel: 0522-2312904 / 5 / 6
Fax: 0522-2311671
e-mail: esp-Lko@LNTEBG.com
Plot No. 518
4th Main Road
K. K. Nagar
Madurai 625 020
Tel: 0452-2537404, 2521068
Fax: 0452-2537552
e-mail: esp-mdu@LNTEBG.com
EBG North Wing Office - 2
Powai Campus
Mumbai 400 072
Tel: 022-67052874 / 2737 / 1156
Fax: 022-67051112
e-mail: esp-bom@LNTEBG.com
#12, Shivaji Nagar
North Ambazari Road
Nagpur 440 010
Tel: 0712- 2260012 / 3
Fax: 0712- 2260020 / 30
e-mail: esp-nag@LNTEBG.com
32, Shivaji Marg
P. O. Box 6223
New Delhi 110 015
Tel: 011-41419514 / 5 / 6
Fax: 011-41419600
e-mail: esp-del@LNTEBG.com
L&T House
P. O. Box 119
191/1, Dhole Patil Road
Pune 411 001
Tel: 020-26135048
Fax: 020-26124910, 26135048
e-mail: esp-pnq@LNTEBG.com
3rd Floor
Vishwakarma Chambers
Majura Gate, Ring Road
Surat 395 002
Tel: 0261-2473726
Fax: 0261-2477078
e-mail: esp-sur@LNTEBG.com
Radhadaya Complex
Old Padra Road
Near Charotar Society
Vadodara 390 015
Tel: 0265- 2311744 / 6613610 / 1 / 2
Fax: 0265-2336184
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48-8-16, Dwarakanagar
Visakhapatnam 530 016
Tel: 0891-6620411-2 / 3
Fax: 0891-6620416
e-mail: esp-viz@LNTEBG.com
Product improvement is a continuous process. For the latest information and special applications, please contact any of our offices listed here.
Electrical Standard Products
Larsen & Toubro Limited
Powai Campus, Mumbai 400 072
Customer Interaction Center (CIC)
BSNL / MTNL (toll free) : 1800 233 5858
Reliance (toll free)
: 1800 200 5858
Tel : 022 6774 5858
Fax : 022 6774 5859
E-mail : cic@LNTEBG.com
Website : www.LNTEBG.com
SP 50528
061109