B us duct S ys tem

[Series LSB PRO / 1000A - 6400A]

Providing Efficient Distribution of Electrical
Power with Minimum Power Loss

Since

01
Introduction

Lectro has manufactured and installed hundreds of thousands of meters of busducts for large and small projects since
1975, both for the domestic market and for exports around the globe.

The production takes place in a state of the art facility, using latest generation precision techniques including CNC,
automation systems and robotics. Lectro products have been type tested by DEKRA laboratories of the Netherlands.

Lectro busduct systems contain high quality components and are trusted for their high safety factor and long life.

Lectro newest range, The «series LSB PRO» busduct provide currents from 1000A to 6400A.

We pride ourselves in delivering systems which exceed the expectation of our customers, both in terms of quality and in
the level of customer service we provide.

02
 Busducts

Advantages of Busduct Over Cables

R eus able, E xpandable C os t S avings

Tap-off units enable the drawing down of Half the man-hours: T hanks to the s andwich des ign, bus ducts
additional power to be easy and compact Installation requires only half the time as have very compact cros s s ectional s iz es

compared to conventional methods and occupy far les s s pace compared to

Modular design of busducts means that the cables

resulting in considerable savings on
distribution supply can be easily changed
installation costs

Can be easily dismantled, relocated and reused Zero shut downs:

Continuity can be maintained as servicing
times are really short and needs no
operational shutdowns

Applications of Busducts
Multiple Loads Vertical Riser Service Entrance
and Single Load

F eeding multi-loads dis tributed throughout a The efficient method to feed high rise From the utility transformer to the main

building / manufacturing facility is eas y and buildings, as distribution to different floors switchboard (service entrance), busduct

time s aving with bus ducts is achieved through convenience tap-offs provides the most hassle free feeding

solution
C onveniently placed tap-offs ens ure that

plugs can be ins talled and removed s afely in Normally used for feeding load concentrated

no time in one area, feeder busduct is the choice of

connection for a switchboard to switchboard

For higher ampere ratings, ‘bolted on’ tap-offs
tie / switchboard to remote Motor Control
provide up to 1600A protection at every joint
Center / switchboard to single load.

03
 Lectrobar Busducts - Unique Features

Since 1975, Lectrobar has manufactured

thousands of meters of installed busducts.

State of the art ISO certified manufacturing

facility has their products type tested by DEKRA

of Netherlands. Lectrobar busducts are trusted

for their high safety factor & long life span.

Safe and Versatile Design

Meet the requirement of IE C 61 - 439

Tes ted and approved by different accredited laboratories

F ully type tes ted at tes ting facility, Netherlands

Manufactured in an ISO 9001/2000 certified facility to ensure highest quality control

Product certified for Mark

S ince 1975 in the market

Tin Coated High Purity True Sandwich for Both High Insulation Tested Grounding and Neutral
Copper Bars Feeder and Plug-in at 2500V for 1 Minute Flexibility

Oxygen free copper No need to separate or flare Two insulation layers used Integral casing ground as standard,
High purity:better or equal to the bars at the outlet 50% additional ground bar, 100%
Main insulation Teflon
%99.99
High short circuit withstand Coated Fiberglass 250 C
o ground bar available
High conductivity: better than for both feeder and plug-in working temperature and
100% , 200% (Full), 50% (Half)
%99.95
Low impedance and low voltage 5000V breakdown
neutral available
Good contact
drop All insulation used better than
class H No need for earth bar, the aluminum
No flame smoke or gas
housing ground conductor is carried
propagation in the housing Working temperature 50o C,
No deration required through the joint
«Chimney Effect»

04
 Two Bolt Patent Joint Design

More than two tons pressure on

overlapping busbars at each bolt

Adjacent phas es s eparated with

non-fla mma ble (V - 0) P B T U L lis ted

( R T I : 140 o C , 23kV /mm)

Joint alignment with two bolts instead of one

in the single bolt to ensure correct

installation even with non skilled labour

Maintenance free joint using special heat

treated spring steel conical shape washers

Unique design for the joint to make its

temperature less than the rest of the busduct

5
YEARS
AR
Y

RANT
W

Space Saving Single Window from

Aluminum Casing Transformer Box
Accessories Design to Delivery

Excellent heat dissipation Corner elbows, tees, crosses, & Enclose flexible joint and Exact design, layout & selection
reducers etc transformer bushing aided by support of engineering
Significant reduction in reactance
Protect the system from the team
and magnetic flux leakage Maximum Layout flexibility
entry of any foreign body Detailed drawing in one week from
Proper ground return path Optimum utilization of space receiving the order
Easy check on transformer oil
Dust and water protection leakage without de-energizing
the system Lower carbon footprint with
Special coating for better heat shorter shipping time to Middle
dissipation East, Africa & Europe Markets

05
Design & Construction

Lectrobar busducts have a sandwich type non-ventilated Busbar and Insulation

configuration. The non-ventilated housing design Lectrobars are fabricated from high strength pure

excludes potential points of penetration by moisture electrolytic copper with suitable cross section tin coated at

and dust. contacts ( conductivity better than 99.5%). Tin coating

provides surface protection and good contact.

Busbars for plug-in applications, have full size welded

conductor tabs. This design extends the contact surfaces

outside of the busduct casing and into the plug-in outlet.

By this design, true sandwich configuration is maintained

throughout the entire busduct length for both feeder Polyester

and plug-in. This will eliminate the need to seperate or

Fiberglass Sheets
flare the conductor bars at the plug-in opening.
Teflon Coated Fiberglass

Tin Plated Copper at Contacts

Maintaining a true sandwich design eliminates potential
pathways for the propagation of flame, smoke and gas
through the busduct casing, commonly referred as the
Shown is a section of Lectro busduct insulation
‘chimney effect’. The sandwich structure with low
impedance ensures low voltage drop and thus, enables consisting of two different insulation materials.

the cost-effective transmission of large amount of Conductors are insulated with Teflon Coated Fiberglass
power even at long distances.
films (10 mil* thickness, 5000 V, 250oC) and layered

with Fiberglass sheets. After assembly all the bars are

wrapped together with polyester tape. The result is an

insulation system that is virtually impervious to the

stress of normal operation. The insulation system is

tested after assembly with 2500 Volt for one minute.

This test is intended to confirm the integrity of the

insulation system and helps ensure the highest quality

busduct possible. All the insulation materials are rated

as class H (minimum) non-flammable hence, no

internal fire barrier is needed. Upon request, the bars

can be insulated with cycloaliphatic epoxy resin class B

130oC.

06
 Design & Construction

Lectrobar is constructed with extruded aluminum Hence, integral housing ground is standard and provides full cross
profile. The non-magnetic aluminum housing ensures section grounding. The system ground continuity is maintained
excellent heat dissipation, a significant reduction in through each joint by the ground path end blocks and joint covers.
reactance and magnetic flux leakage. Both, the new casing In addition, the housing ground conductor is carried through the
design and the special casing coating ensure the best heat joint. This design ensures that the integrity of the ground path is
dissipation possible from the system. This allows the system to maintained by the same mechanical pressure used to maintain
work without derating up to 50oC. Standard casing is IP54. On
the continuity of the conductive path (Casing tested as earth at
request IP55, IP65 and IP67 casings can also be supplied.
DEKRA Netherlands). An internal ground bus adds no benefit with
this method. It adds only unnecessary cost to the system.

Aluminum casing provides an excellent ground return path. However, for applications where the clients insist on 50% or 100%

DC resistance /meter of the casing is less than 0.03 milliohm. earth bar, Lectro can provide it as an optional.

Ampere
Rating (A) Busducts

1000 LSBPROC3FNHFI0100 140 140 13.5

1300 LSBPROC3FNHFI0130 160 140 15.5

1600 LSBPROC3FNHFI0160 180 140 25.5

2000 LSBPROC3FNHFI0200 285 140 27

2500 LSBPROC3FNHFI0250 325 140 31

3500 LSBPROC3FNHFI0350 360 140 51

3100 LSBPROC3FNHFI0310 430 140 40.5

4000 LSBPROC3FNHFI0400 580 140 54

5000 LSBPROC3FNHFI0500 655 140 62

6000 LSBPROC3FNHFI0600 735 140 102

07
Types of Busducts

Feeder Busducts

1000 A & 1300 A & 1600 A

LSB PRO

2000 A & 2500 A & 3500 A

Ampere Feeder
Rating (A) Busducts

1000 LSBPROC3FNHFI0100SL3
1300 LSBPROC3FNHFI0130SL3
1600 LSBPROC3FNHFI0160SL3
3100A
2000 LSBPROC3FNHFI0200SL3
2500 LSBPROC3FNHFI0250SL3
3500 LSBPROC3FNHFI0350SL3

3100 LSBPROC3FNHFI0310SL3

4000 LSBPROC3FNHFI0400SL3
4000 A & 5000 A & 6000 A
5000 LSBPROC3FNHFI0500SL3
6000 LSBPROC3FNHFI0600SL3

Standard length 3000 mm

08
Types of Busducts

Plug - in Busducts

1000 A & 1300 A & 1600 A

LSB PRO
Plug - in Busducts

2000 A & 2500 A & 3500 A

Ampere Plug-in
Rating (A) Busducts

1000 LSBPROC3FNHPI0100SL3
1300 LSBPROC3FNHPI0130SL3
1600 LSBPROC3FNHPI0160SL3
3100A
2000 LSBPROC3FNHPI0200SL3
2500 LSBPROC3FNHPI0250SL3
3500 LSBPROC3FNHPI0350SL3

3100 LSBPROC3FNHPI0310SL3

4000 LSBPROC3FNHPI0400SL3
4000 A & 5000 A & 6000 A
5000 LSBPROC3FNHPI0500SL3
6000 LSBPROC3FNHPI0600SL3

Standard length 3000 mm

09
 Innovations

Joints:
Joints in all ratings are of a two bolt patent design, which

can be checked for tightness without de-energizing the

system. This design ensures excellent contact between

each set of the busbars and the joint. This method exerts

more than two tons of pressure on overlapping bus bars at

each bolt. This force is distributed over the contact area by

two pairs of large diameter spring steel conical shape

washers. These washers ensure maintenance free joint.

Hex Bolt
Joint alignment is made by two bolts instead of one bolt in the

single bolt design. This design ensures the correct installation

of the busduct joint even with non skilled labor. The joint
Teflon Tube
temperature is less than rest of the busduct due to the
Joint Heat Sink specially designed heat sinks and contact surface. Figure A

shows the contact resistance at different torque with the

washers. The tightening torque of joint bolt does not run down
Copper/Bimetal
after initial accomodation, and is maintained at a level that
PBT
ensures stability of contact resistance and temperature rise.

Pressure Plate

Spring Steel
Washer Contact Resistance at joint
Hex Nut 65
63
)

60 57.8 57.4 57.13 57.1

Resistance (

55

50

45

40
20 40 60 80 100

Torque ( N-m )
Figure A

10
 Innovations

The bolts are insulated with Teflon Coated Fiberglass and

passed through the joint in a Teflon tube to eliminate any
problems arising from joint bolts. Joint blocks are used to
ensure parallel joints of bars and complete mechanical
jointing using non-flammable (V -0) Polybutylene
Terephthalate UL listed (RTI :140oC,Dielectric Strength
23kV/mm).

Double head bolts are used as optional. One head breaks at

the required torque so no need for torque wrenches. Smart
bolts can be used also as optional for critical sites. Using smart
bolts results in less fatigue for installers, no repeated torque
wrench calibration, no sample re-tightening, no turn-of-nut
confirmation required. Installers can easily identify and focus
on loose bolts to re-tighten. The ability to visually inspect
fasteners also creates safer working conditions particularly in
elevated structures and areas exposed to hazardous
materials.

Ampere M O
No ( in mm ) ( in mm )
Rating (A)

1000 1 120 250

Smart bolts *
1300 1 120 250

1600 1 120 250

2000 2 120 250

2500 2 120 250

3500 2 120 250

3100 3 120 250

4000 4 120 250

5000 4 120 250

* Upon request 6000 4 120 250

11
 Accessories

10 8

12
4

1
3
5

9
6 11

Complete line of ‘standard fittings’ or ‘made to fit’ accessories with wide varieties are available to
meet every application need.

These accessories include :

1. Flat Elbows 7. Flexible joints
2. Edgewise Elbows 8. Spring Riser
3. Corner Flat Elbows 9. Angle Hanger
4. Corner Edgewise v 10. End Closure
5. Tees and Crosses 11. Standard Joint
6. Transformer and Switchboard Flanges 12. Long Joint

12
 Accessories - Flat Elbow

Ampere Flat Min

X,Y
Rating (A) Elbow (mm)

1000 LSBPROC3FNHFI100EF 290

1300 LSBPROC3FNHFI130EF 310

1600 LSBPROC3FNHFI160EF 330

2000 LSBPROC3FNHFI200EF 435

2500 LSBPROC3FNHFI250EF 475

3500 LSBPROC3FNHFI350EF 510

3100 LSBPROC3FNHFI310EF 580

4000 LSBPROC3FNHFI400EF 730

5000 LSBPROC3FNHFI500EF 805

6000 LSBPROC3FNHF600EF 885

14 13
 Accessories - Edgewise Elbow

Ampere Edgewise Min

X,Y
Rating (A) Elbow (mm)

1000 LSBPROC3FNHFI100EE 290

1300 LSBPROC3FNHFI130EE 290

1600 LSBPROC3FNHFI160EE 290

2000 LSBPROC3FNHFI200EE 290

2500 LSBPROC3FNHFI250EE 290

3500 LSBPROC3FNHFI350EE 290

3100 LSBPROC3FNHFI310EE 290

4000 LSBPROC3FNHFI400EE 290

5000 LSBPROC3FNHFI500EE 290

6000 LSBPROC3FNHF600EE 290

14
 Accessories - Offset Elbow

Ampere Min Min Min Min

Offset Elbow X,Y Z Offset Elbow X,Y Z
Rating (A) Flat (mm) (mm) Edgewise (mm) (mm)

1000 LSBPROC3FNHFI100OF 290 190 LSBPROC3FNHFI100OE 290 330

1250 LSBPROC3FNHFI125OF 330 210 LSBPROC3FNHFI100OE 290 330

1600 LSBPROC3FNHFI160OF 330 210 LSBPROC3FNHFI100OE 290 330

2000 LSBPROC3FNHFI200OF 435 365 LSBPROC3FNHFI200OE 290 330

2500 LSBPROC3FNHFI250OF 475 375 LSBPROC3FNHFI250OE 290 330

3500 LSBPROC3FNHFI350OF 415 515 LSBPROC3FNHFI350OE 290 330

3100 LSBPROC3FNHFI310OF 580 510 LSBPROC3FNHFI310OE 290 330

4000 LSBPROC3FNHFI400OF 730 660 LSBPROC3FNHFI400OE 290 330

5000 LSBPROC3FNHFI500OF 805 755 LSBPROC3FNHFI500OE 290 330

6400 LSBPROC3FNHFI600OF 885 855 LSBPROC3FNHFI600OE 290 330

15
Accessories - Corner Elbow
In addition to these fittings, Lectro offers a space saving corner joint elbow. This elbow has the same construction of Lectro
Joints in the form of elbow. Due to its compact design, the corner joint allow optimum utilization of space.

With a minimum leg length of 13 cm for an edgewise elbow, the corner joint elbow can solve any serious path problems
and helps to achieve optimum layout with minimal space requirements.

Ampere Corner Elbow

Rating (A) ( Edgewise )

1000 LSBPROC3FNHFI0100CEE

1250 LSBPROC3FNHFI0125CEE

1600 LSBPROC3FNHFI0160CEE

2000 LSBPROC3FNHFI0200CEE

2500 LSBPROC3FNHFI0250CEE

3500 LSBPROC3FNHFI0350CEE

3100 LSBPROC3FNHFI0310CEE

4000 LSBPROC3FNHFI0400CEE

5000 LSBPROC3FNHFI0500CEE

6400 LSBPROC3FNHFI0640CEE

Flat: The space saving flat elbow takes no additional space up to 1600A. It is a regular joint rotated 90 degree.
These elbows are constructed with non-flammable Fiberglass 2mm thickness sheets with a 8kV/mm.

Ampere Corner Elbow

Rating (A) ( Flat )

1000 LSBPROC3FNHFI0100CEF

1250 LSBPROC3FNHFI0125CEF

1600 LSBPROC3FNHFI0160CEF

2000 LSBPROC3FNHFI0200CEF

2500 LSBPROC3FNHFI0250CEF

3500 LSBPROC3FNHFI0350CEF

3100 LSBPROC3FNHFI0310CEF

4000 LSBPROC3FNHFI0400CEF

5000 LSBPROC3FNHFI0500CEF

6400 LSBPROC3FNHFI0640CEF

16
Accessories - Tees and Crosses
Tees are busduct fittings for connection in three directions.
Crosses are suitable for connection in four directions. Crosses are applied when a bus run must branch off in three
directions in the same plane.

Flat Edgewise

Length (mm)

Ampere T-Elbow T-Elbow Cross Cross

Rating (A) Edgewise Flat Edgwise Flat

1000 LSBPROC3FNHFI0100TE LSBPROC3FNHFI0100TF LSBPROC3FNHFI0100CE LSBPROC3FNHFI0100CF

1250 LSBPROC3FNHFI0125TE LSBPROC3FNHFI0125TF LSBPROC3FNHFI0125CE LSBPROC3FNHFI0125CF

1600 LSBPROC3FNHFI0160TE LSBPROC3FNHFI0160TF LSBPROC3FNHFI0160CE LSBPROC3FNHFI0160CF

2000 LSBPROC3FNHFI0200TE LSBPROC3FNHFI0200TF LSBPROC3FNHFI0200CE LSBPROC3FNHFI0200CF

2500 LSBPROC3FNHFI0250TE LSBPROC3FNHFI0250TF LSBPROC3FNHFI0250CE LSBPROC3FNHFI0250CF

3500 LSBPROC3FNHFI0350TE LSBPROC3FNHFI0350TF LSBPROC3FNHFI0350CE LSBPROC3FNHFI0350CF

3100 LSBPROC3FNHFI0310TE LSBPROC3FNHFI0310TF LSBPROC3FNHFI0310CE LSBPROC3FNHFI0310CF

4000 LSBPROC3FNHFI0400TE LSBPROC3FNHFI0400TF LSBPROC3FNHFI0400CE LSBPROC3FNHFI0400CF

5000 LSBPROC3FNHFI0500TE LSBPROC3FNHFI0500TF LSBPROC3FNHFI0500CE LSBPROC3FNHFI0500CF

6400 LSBPROC3FNHFI0640TE LSBPROC3FNHFI0640TF LSBPROC3FNHFI0640CE LSBPROC3FNHFI0640CF

17
Accessories - Transformer Connection

The transformer connection is equipped with the necessary flexible joints and is totally enclosed in an IP54/55 box that is
uniquely provided by Lectrobar. The box is equipped with a Plexi Glass door to allow the check of the presence of an oil
leak without de-energizing the system. The flexible connection is used to allow for busduct expansion and contraction
on the low voltage spades.

Connection with oil type transformer Connection with dry type transformer

18
 Transformer & Swichboard Flanges
Both Lectro feeder and plug-in busduct can be connected on both sides of transformer and switchboard by a coordinated

system in simple and easy way which saves 20% of switchboard size. Also, it guarantees safe connection in minimum

installation time. Lectro busduct enters the switchboard or leaves the transformer by special attachment which is tailored

according to the dimension and design of both transformer and switchboard. Cut out dimensions and drilling plans are

provided with the customer drawings. For proper coordination between busduct and other equipment, detailed drawings

including orientation, room plan and height, distance between transformer bushing, transformer and switchboard

dimensions should be given. Lectro design and planning group will prepare all necessary drawings and coordination.

Transformer Flange Transformer Flange Flange End

Oil Type Dry Type

Ampere Ampere Ampere

Rating (A)
Oil Type Rating (A)
Dry Type Rating (A)
Flange End

1000 LSBPROC3FNHFI0100 TFOT 1000 LSBPROC3FNHFI0100 TFDT 1000 LSBPROC3FNHFI0100 FE

1250 LSBPROC3FNHFI0125 TFOT 1250 LSBPROC3FNHFI0125 TFDT 1250 LSBPROC3FNHFI0125 FE

1600 LSBPROC3FNHFI0160 TFOT 1600 LSBPROC3FNHFI0160 TFDT 1600 LSBPROC3FNHFI0160 FE

2000 LSBPROC3FNHFI0200 TFOT 2000 LSBPROC3FNHFI0200 TFDT 2000 LSBPROC3FNHFI0200 FE

2500 LSBPROC3FNHFI0250 TFOT 2500 LSBPROC3FNHFI0250 TFDT 2500 LSBPROC3FNHFI0250 FE

3500 LSBPROC3FNHFI0350 TFOT 3500 LSBPROC3FNHFI0350 TFDT 3500 LSBPROC3FNHFI0350 FE

3100 LSBPROC3FNHFI0310 TFOT 3100 LSBPROC3FNHFI0310 TFDT 3100 LSBPROC3FNHFI0310 FE

4000 LSBPROC3FNHFI0400 TFOT 4000 LSBPROC3FNHFI0400 TFDT 4000 LSBPROC3FNHFI0400 FE

5000 LSBPROC3FNHFI0500 TFOT 5000 LSBPROC3FNHFI0500 TFDT 5000 LSBPROC3FNHFI0500 FE

6400 LSBPROC3FNHFI0640 TFOT 6400 LSBPROC3FNHFI0640 TFDT 6400 LSBPROC3FNHFI0640 FE

19
Flange End

Flange Panel Collar

1000A 300 470 - - 80

1250A 350 470 - 100
1600A 350 470 - - 120

2000A 470 470 225 65 80

2500A 470 470 265 65 100
3500A 550 470 305 65 120

3100A 550 470 370 65 80

4000A 800 470 515 65 80

5000A 800 470 595 65 100
6400A 900 470 675 65 120

20
 Accessories - Transformer Connection

Ampere
Rating (A)
Oil Type Dry Type Oil Type Dry Type

1000 LSBPROC3FNHFI100TFOT LSBPROC3FNHFI100TFDT

1250 LSBPROC3FNHFI125TFOT LSBPROC3FNHFI125TFDT
1600 LSBPROC3FNHFI160TFOT LSBPROC3FNHFI160TFDT

2000 LSBPROC3FNHFI200TFOT LSBPROC3FNHFI200TFDT

2500 LSBPROC3FNHFI250TFOT LSBPROC3FNHFI250TFDT
3500 LSBPROC3FNHFI350TFOT LSBPROC3FNHFI350TFDT

3100 LSBPROC3FNHFI310TFOT LSBPROC3FNHFI310TFDT

4000 LSBPROC3FNHFI400TFOT LSBPROC3FNHFI400TFDT

5000 LSBPROC3FNHFI500TFOT LSBPROC3FNHFI500TFDT
6400 LSBPROC3FNHFI640TFOT LSBPROC3FNHFI640TFDT

21
Accessories - Reducers

Non Protected Reducer

Non-protected reducers are used to reduce the capacity of

busduct without protection device. No protection is

required where busduct is reduced in size provided that the

length of the smaller busduct is less than 15m and has a

current rating of at least 1/3 of the larger busduct. The

reduction is made by a patent joint design to make the

reduction in minimum space.

Protected Reducers
R educer boxes with circuit breakers or fus es are us ed
for protection and as a dis connecting means.

R eduction in bus capacity is made within the box .Minimum

length of the protected reducer is 80cm.

Expansion Coupling
Lectro busduct is designed to expand as a load is applied

and the temperature of the busbar increases. If the

installation can accept this movement, then no expansion

coupling is required. Generally, horizontal runs do not

require expansion lengths. However, if both ends of the

busduct are fixed, normal expansion is restricted. In this

case, expansion coupling will be necessary. Expansion

couplings are manufactured using a layered laminated

flexible section bolted to the adjacent copper conductors.

Expansions are individually insulated within the truncking

body and identified by means of a label attached to the side

of the expansion length box.

22
Accessories

End Closure
End closures terminate a busduct run and can be used to
close right or left ends. It is constructed from thick
Fiberglass sheets laid between the busduct bars.

Fixation and Hangers

Horizontal Hangers
Angle Hangers are provided for every 3 meters of
horizontally mounted busduct . The type of hanger
supplied is determined by the specific mounting.

Vertical Hangers
A spring suspension type is used for vertical runs. This
hanger equalizes the weight of vertically mounted
busduct along all supports. These hangers compensate for
expansion and contraction of the busduct . At least, one
vertical hanger must be used for each floor.

Feed Box
Feed units are used to supply power to the busduct. The
box is made from sheet steel containing either connection
strip, circuit breaker or fuses. However, it is recommended
to feed busducts over 1600A directly from the distribution
panel. The minimum length of the feed unit depends on
the size of cables entering the box, but normally it is
greater than 80cm.

Busduct Final Fit Piece

A final fit section of busduct is typically an elbow or a short
length; left intentionally for later shipment. Its purpose is
to effectively manage the dimensional uncertainties that
may involve in busduct layout.

23
Tap-offs
An O N-O F F handle mounted on tap-off to operate the
breaker without opening the cover.
T he tap-off boxes are made from s heet s teel painted with
electros tatic paint or galvaniz ed. T ap-off with breakers
have the following precautions to ens ure s afe operation:

A cover interlock to prevent opening while the tap-offs

in the O N pos ition
An O N-O F F handle mounted on tap-off to operate the
breaker without opening the cover
A s witch interlock to prevent putting the device into
operation when the cover is open

A s afety interlock to prevent ins ertion or removal of the

plug while in the O N pos ition

To ensure that the tap-off plugs are seated onto the busduct,
the box is equipped with a clamping mechanism.
This mechanism will draw the unit tight on to the busduct
housing as the installer tightens the clamps. The contact
resistance between plug pins and the tinned busbars is
constant even after years of operation due to the high contact
pressure.

Bolted On
Bolt-on tap-offs are used as power take-off up to 1600 A. When the required current is higher than the capacity of the
plug-in, tap-off unit bolts directly to the contact surfaces of the busbar joint. This unit can carry either a circuit breaker
or fuses.

Rated X Y Z
Current (cm) (cm) (cm)
Z
Y 32A 35 20 15

Up to 160A 40 30 25

160A to 250A 50 30 25

250A to 400A 60 30 26

400A to 700A 70 30 26

700A to 800A 80 40 33

800A to 1000A 90 40 33

24
 Electrical Data Sheet

1000V
up to 1000V
8kV
50Hz or 60Hz

1000 1300 1600 2000 2500 3100 3500 4000 5000 6000
Short Circuit Current
50 50 70 85 100 100 100 100 100 100
105 105 154 187.00 220 220 220 220 220 220
Characteristics under normal operation
73.64 60.13 41.7 37.52 25 26.12 19.14 19.7 12.5 9.77
22.98 28.6 30.2 4.82 6 7.85 8.98 6.17 5 7.5
77.14 66.58 51.48 37.82 25.70 27.27 21.14 20.64 13.46 12.31
31.00 19.00 15.50 15.50 14.00 10.33 7.75 7.00 7.00 4.70

62.95 56.51 44.58 28.49 20.43 22.17 17.92 16.85 11.25 10.66
65.95 57.51 43.74 31.03 21.71 23.28 18.26 17.65 11.60 10.40
63.77 52.07 36.11 32.49 21.65 22.61 16.57 17.06 10.82 8.46
( full load current ) (B)
62.95
65.95
63.77

*The value of the voltage drop is for distributed load.

For voltage drop in V/m multiply the table values by the actural current.
Shown values are line to line voltage drop.
* From 2500 A to 6000 A tested at 85 kA**
Note: for current loading between 75% & full load take voltage drop average of both values (A+B)/2

25
DSLB Busduct Catalogue Numbering System

Ground Busduct Type

Integrated Housing Feeder
50% Earth Bar Plug-in
100% Earth Bar Riser

System Configuration Busduct Description

3FN 3 Phase Full Neutral I Indoor IP54
3HN 3 Phase Half Neutral I* Indoor with extra Water protection IP55
3DN 3 Phase Double Neutral O Outdoor IP65
30N 3 Phase Zero Neutral O* Outdoor Heavy Rain IP67

Busbar Material Ampere Rating

Copper See Table A

Busduct Name
Descriptive Identification
LSB PRO Lectrobar Sandwich See Table B
Busduct PRO

LSBPRO C 3F N H F I 100 SL L

Table A Table B

100 1000 SL L Straight Length of L meters

OSL L Plug-in of L meters
130 1250 EF XY Flat Elbow with X,Y Dimentions
EE XY Edgewise Elbow with X,Y Dimentions
160 1600
OF XY Offset Elbow-flat with X,Y Dimentions

200 2000 OE XZY Offset Elbow-Edgewise with X,Y,Z Dimentions

COE XZY Combination Elbow with X,Y,Z Dimentions
250 2500 CEE XY Corner Elbow Edgewise with X,Y Dimentions
CEF XY Corner Elbow Flat with X,Y Dimentions
310 3100
TE XZY T-Elbow Edgewise with X,Y,Z Dimentions
TF XZY T-Elbow Flat with X,Y,Z Dimentions
350 3500
CE XY Cross Edgewise with X,Y Dimentions

310 3100 CF XY Cross Flat with X,Y Dimentions

TFOT L Transformer Flange - Oil Type of L meters
400 4000 TFDT L Transformer Flange - Dry Type of L meters
FE L Flange End of L meters
500 5000
PR L Protected Reducer of L meters

600 6000 EX L Expansion of L meters

FB L Feed Box of L meters
26
 International Projects

ENGLAND KOREA NORWAY U.A.E

KSA NIGERIA ALGERIA IRAQ

OMAN KENYA TANZANIA ZAMBIA

CHAD JORDAN QATAR SUDAN

BAHRAIN