Single bar compact design

Aluminium case as earth with cooling fins

Outdoor application - IP66

Easy Installation

Low noise and low maintenance

Conform to IEC 60439-2:2005

MM Powerplus Busway

distribute power the easiest way

Design Originated from BICC

MADE IN M

ACAU

www.mmpowerplus.com

ISO 9001:2008File 20001803

MM Powerp lus Busway Limited

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Inside Back Cover

• Design originated from BICC

• Features

• Installation - 4 Easy Steps

• Physical Data

• Standard Fitting

• Expansion Unit

• Flange End

• Support System

• Tap-off Unit

• Clearance

• Technical Data

• Suggested Specification

• Periodical Maintenance

• International Recognition

CONTENTS

MM POWERPLUS BUSWAY

Design originated from BICC

1

MM Powerplus Busway is a specially designed low

impedance busway for high rise buildings and heavy

industry where high currents and fault handling capacities

are required.

MM Powerplus Busway is available in 400-5000A

in the unique 1 bar per phase design with either copper or

aluminium conductors. Most other busway systems

require up to 3 bars per phase.

New options in planning power supply - In higher

amperages MM Powerplus Busway usually requires less

than half the space of other busways or similarly rated

cable formations.

The narrow width means it can be run on edge in

risers or under ceilings. This allows greater flexibility in

plant layout and simplifies connections. When voltage

drop is a criterion, its very low impedance allows smaller

conductors to be used, giving even greater space savings.

MM Powerplus Busway offers greater flexibility in

layout and design than any other busway system.

Substantial savings on building costs - Space

saved by MM Powerplus Busway can be allocated to

other purposes. Larger module lengths and fewer

conductor bars reduce the number of joints which save

installation time and installation costs.

Made to Australian and World Standards - The

management system of our company is in compliance to

the stringent quality assurance standard of ISO

9001:2008. Our busway complies with the requirement of

IP66. It has been independently tested by ASTA

Accredited Laboratory and National Association of

Testing Authorities (NATA) for compliance with IEC

60439 - Parts 1 and 2, BS EN 60439 - Parts 1 and 2.

BICC designed MM Powerplus busway system has the

following combination of design features

＊ Compact size with one bar per phase (up to

5000A), requiring less space than

conventional busways for installation

＊“Finned” casing to enhance heat dissipation

＊ Non-ferrous (aluminium) casing avoids corrosion

＊ Feeder rated IP66 for outdoor applications

＊ Insulation with thermal rating of Class B

＊ Low impedance sandwich design

＊ Simple to install

＊ 3-phase 4-wire with 50% integral ground

as standard, with options:

(1) 3-phase 3-wire

(2) 3-phase 5-wire (50% internal ground)

(3) 3-Phase 5-wire (100% internal ground)

(4) 3-phase 5-wire (200% neutral)

(5) 3-phase 6-wire (200% neutral and 50%

internal ground)

2

MM POWERPLUS BUSWAY

Features

Compact design - The unique 1 bar design and

cooling fins have resulted in the most compact busway

system available. In the higher ampere range, MM

Powerplus Busway typically takes less than half the

space of other busway systems.

Case as earth - Since it is made from extruded

aluminium which provides a better capacity earthing

medium than sheet steel casing, the casing of busways

can be used as the earth.

MM Powerplus Busway earthing system has been

fully short-circuit tested.

Easy installation - The simple joint construction

and accurate manufacturing tolerances mean that joint

assembly is simple, an important consideration in space

limited situations.

Flexible design - The case of MM Powerplus

Busway is manufactured from extruded aluminium

w h i c h a l l o w s f o r s p e c i a l c o m p o n e n t s t o b e

manufactured to suit customer requirements.

Low noise - The conductors and insulation are

tightly encased in the housing, therefore generating

almost no noise when energized.

Low maintenance - MM Powerplus Busway is

designed and manufactured for long life with minimal

maintenance. Periodic inspection and checking of joint

bolts are all that required every 24 months.

M a g n e t i c f i e l d - Te s t s b y i n d e p e n d e n t

laboratories have shown negligible magnetic fields that

are generated from the busway.

Outdoor applications - Each section of MM

Powerplus Busway is fully sealed in the factory.

Joints between sections can easily be adapted to

outdoor applications. The corrosion- resistant

a lumin ium case i s idea l ly su i t ed to ou tdoor

applications and complies to IP66 standard.

Enhanced heat dissipation - MM Powerplus

Busway runs cooler because the surface area of the

finned casing far exceeds that of the wide flat casing on

conventional multi-bar busways of the same current

ratings.

Smoke barriers - Due to the tight sandwich design,

there is no path for smoke or fire to travel within the

busway casing. Internal fire barriers are therefore not

required.

Phase Transposition Units - For long busway run,

it is often desirable to minimize the reactance to reduce

the voltage drop. Under such situation, it is common to

transpose the phases so that voltage drop can be made

nearly equal and avoid uneven loads in the circuit.

MM POWERPLUS BUSWAY

( 1 ) Put two sections together. Install the joint

cover and jointing bolts.

( 2 ) Make sure all phases are isolated in couple.

( 3 ) Insert the side plate and tighten the bolts.

( 4 ) Use torque wrench to tighten the jointing

bolts to our requirement.

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Installation - 4 Easy Steps

MM POWERPLUS BUSWAY

Physical Data

MM Powerplus Busway system can operate at full load continuously that the maximum housing

temperature rise will not exceed 55K ( Absolute Temperature ) above the ambient temperature 40°C.

W

H

3P4W Copper Busway

3P4W Aluminium Busway

4

3P5W (50% Internal Earth) Copper Busway

MM POWERPLUS BUSWAY

Standard Fitting

STRAIGHT LENGTH

EDGEWISE ELBOW

FLATWISE ELBOW

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L L

L

L L

MM POWERPLUS BUSWAY

Standard Fitting

EDGEWISE ELBOW OFFSET

FLATWISE OFFSET

TEE SECTION

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L1

L2

L1

L1 L2L1

L2

L1

MM POWERPLUS BUSWAY

Expansion Unit

EXPANSION UNIT

MM Powerplus Busway expands or contracts as

it is heated by load current or as the ambient

temperature changes. The elongation of the busway is

approximately 1-1.5mm/m of busway, depending

upon the type of installation. This expansion may

need to be catered for by the use of an expansion unit.

In installations where tap-off boxes are used, the

load on the majority of the busway will be well below

the normal rating of 1.5mm/m. In horizontal

installations, expansion is fully absorbed in the busway

joints and bends. In vertical installations, where fixed

and spring supports are used, the following table can be

used as a guideline for the requirements for expansion

units.

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L L L L LCase A

Tap-off Box

FixedSupport

SpringHanger

Case B Case C Case D Case E

T

W

L

MM POWERPLUS BUSWAY

Flange End

5-Wire

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4-Wire / 3-Wire

Top V iewFront V iew Side V iew

Type 3Type 2Type 1 Type 45-W ire

4-W ire

3-W ire

CC

25

5050

3025C CC

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Ø11 Ø11

C18

30

CC

50

50 50

4

A

150150 150

Ø11

EE

15

118

D

540

38

15

15 15

118 118 118

CC

25

5050

50

Ø14x20

2550

CC

50

30

C18

Ø11 Ø11

C18

30

CC

4

A

BB B B

Ø11

EE

15

G

D

F

40

15

15 15

G G G

CC

25

5050

5025

50

CC

50

30

C18

Ø11 Ø11

C18

30

CC

4

A

150 150

Ø11

EE

15

D390

38

15

15 15

161 161

Ø14x20

Ø14x20Ø14x20

Ø14x20Ø14x20

MM POWERPLUS BUSWAY

Flange End

EDGEWISE ELBOW FLANGE END

FLATWISE ELBOW FLANGE END

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STANDARD FLANGE END

L

L2 L1

L2 L1

MM POWERPLUS BUSWAY

Support System

For horizontal installations, sliding ‘C’ and ‘H’ cleats are available for mounting on customer supplied channels or

angles. Supports are required approximately every 1.5-2.5m with a minimum of one support per busway section.

Support - vertical installation

(i) Vertical hanger spring support (ii) Vertical hanger fixed support

For vertical risers, fixed vertical supports (vertical hangers) and spring supports

(vertical spring hangers) are available. In a typical riser, a fixed support is installed at the

base of the riser and the spring supports are installed at every second floor above the fixed

support. The spring supports are designed to support between 3 and 6m of busway, the

length being adjustable by adjusting the spring length. At each floor level, sliding cleats

as used in a vertical installation are installed at least one pairs per one section to restrict

any lateral movement of the busway.

Remark: For site installation procedures, please refer to Installation Manual provided by MM Powerplus Busway.10

Support - horizontal installation

(i) Flatwise (ii) Edgewise

‘ C’ Cleat ‘ H’ Cleat

MM POWERPLUS BUSWAY

Tap-off Unit

Tap-off Box

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MM Powerplus Busway can be fitted with points to allow the fitting of tap-off boxes for electrical distribution.

Position of tap-off points are arranged to customer requirements and a 3.5m standard busway section can have up to

three tap-off points fitted. Plug-in type tap-off points (type 1) are rated at 400A as standard. For current above 400A,

tap-off points should be bolt-on type (type 2). A range of different fault capacities is available from 36 to 85kA for

MCCBs and up to 80kA for FS (Fusible Switch) units. The degree of protection is of IP41, with IP54 as an option.

Type 1 Type 2ON

OFF

ONOFF

WL

D

ONOFF

Operating Handle

MM POWERPLUS BUSWAY

Clearance

Clearances for Tap-off Feeders

In order to allow for installation of tap-off boxes on adjacent wall, the clearances need to be increased as follows:

Clearances through walls and floors

If a vertical fixed or spring support is to be installed, the distance between finished floor level to center of first joint

should be within the range of 600mm to 700mm, otherwise, the distance should be L as per the following table. The

minimum of wall/floor opening should be 50mm apart from the busway casing.

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C

Clearances between busways & walls

In order to allow for adequate heat dissipation and for installation of the busway section joints, the following

minimum clearances are required.

600mmto

700mm

Min

.50m

m

Min

.50m

m

L

Min.50mm

Min.50mm

150150 250

150

MM POWERPLUS BUSWAY

Technical Data

The line-to-line voltage drop of 3-phase a.c. system per meter is calculated by the following formula:

Volt. Drop = √3 x (RL cosθ + X sinθ) x IL x k x L

where,

IL = Load Current (A)

cosθ = Power Factor

sinθ = √(1-cos² θ)RL = Load Resistance (Ω/m)

X = Reactance (Ω/m)

k = Load Distribution Factor

L = Length of Busway Run (m)

*In general, k factor is 1 for concentrated load, 0.5 for distributed load.

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Voltage Drop

Short circuit capacity

The single bar design and sandwich construction mean that the busway will withstand high short circuit forces.

The busway system is ASTA certified to fault.

MM POWERPLUS BUSWAY

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Technical Data

Copper Conductors: Frequency - 50Hz

Aluminium Conductors: Frequency - 50Hz

Copper Conductors: Frequency - 60Hz

Aluminium Conductors: Frequency - 60Hz

MM POWERPLUS BUSWAY

Suggested Specification

The busway system shall be of low impedance sandwich type, compact in size and totally enclosed for protection

against mechanical damage and dust accumulation. All arrangements, details and locations shall be as shown on the

drawings and specified herein.

The busway conductors shall be of copper, TP Full Neutral, plus 50% internal ground. The casing shall be of

extruded aluminium to provide maximum protection against corrosion from water and other contaminants normally

encountered during construction. Finned aluminium casing should be used to allow heat generated by the conductors to

be dissipated more efficiently than the larger steel casings of conventional busway systems.

The busway shall be certified for IP66 for feeder type, and IP54 for tap-off type, according to IEC 60439-2.

The conductor bars shall be electrolytically tin-plated and insulated by Class B (130°C) material over its entire

length, except at the joint parts. The temperature rise at any point in the busway casing shall not exceed 55K (Absolute

Temperature) above ambient temperature when operating at rated current.

Joints shall be made by simply sliding together the busway units, and tightening the clamping bolts progressively

to the specific torque. It shall be possible to remove any joint connection assembly to allow electrical isolation or

physical removal of a busway unit without disturbing adjacent lengths.

Spacing of supports for horizontal runs shall not exceed 2.5m. Vertical riser shall be supported adequately with

rigid and / or spring hangers.

Each tap-off unit shall be mechanically interlocked with the busway housing to prevent installation or removal of

tap-off unit while the switch is in the “ON” position. Earth contact in the tap-off unit should be fitted into the earth

contact of the tap-off feeder prior to other live and neutral contacts. The tap-off unit shall be equipped with internal

barriers to prevent accidental contact with live parts on the line side of the protective device.

Expansion units shall be provided where necessary, especially when the busway runs pass through the building

expansion joints. In addition, they shall be capable of taking up all thermal expansion.

The busway supplier shall be capable of making and delivering the replacement / final connection units within 5

working days ex-factory (with a maximum quantities of up to 5 pieces) which may be urgently required to cope with the

actual site conditions / any design changes.

All busway products shall be manufactured in a facility where the Quality Systems is certified to ISO 9001:2008.

The busway and tap-off units shall be manufactured by MM Powerplus Busway Limited, or equivalent.

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MM POWERPLUS BUSWAY

Periodical Maintenance

WARNINGDe-energize the busway before performing any of the following operations: If there

are any signs of overheating, visually check for deterioration or contamination of

insulation and contact surfaces.Also, check tightness of nuts, bolts, etc.

Maintenance procedure (Recommended to be performed every 24 months):

1. Check Joint Bolt Torque:

a) For M16 bolts, the torque should be 120Nm or 90Lb-ft;

b) For M12 bolts, the torque should be 60Nm or 45Lb-ft;

2. Check if top and side Cover Plate Bolts are tight.

3. Brush off any accumulated dust or foreign objects present upon casing and between fins.

4. Check if all support brackets and cleats are tight and in working condition.

5. Carry out Insulation Resistance Test of the system.

Further recommendations:

* Inspect the busway system periodically. An infrared thermometer may be used to thermally scan the run to identify

potential hot spots.

* If there are signs of overheating, visually check for deterioration or contamination of insulation and contact surfaces.

Also, check tightness of nuts, bolts, etc.

* Check for missing or broken parts, corrosion, dirt or signs of arcing. Clean or replace parts as required.

* Keep busway free of dust, dirt and / or foreign objects. Moisture from roof leaks or dripping pipes should be

avoided. Should the busway become contaminated with water, please contact our sales or agent office.

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MM POWERPLUS BUSWAY

The design of MM Powerplus Busway has been tested by worldwide recognized and accredited laboratories.

The whole range of product is made to comply and conform to the requirement of renown international standards.

International Recognition

Macau Office :MM Powerplus Busway LimitedAdd : Est. Ponte de Pac On, S/N, Edif. Ind. San Nam, 1°Andar, Taipa, MacauTel : (853) 2885 0125Fax : (853) 2885 0131

Hong Kong Office :MM Powerplus Busway (HongKong) LimitedAdd : Room 2301, 23/F., The Centre Mark, 287-299 Queen’s Road Central, Hong KongTel : (852) 2838 6898Fax : (852) 2838 6689

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Ed

itio

n P

P3

P

Email : sales@mmpowerplus.com Website : www.mmpowerplus.com

Singapore Office :MM Powerplus Busway (Singapore)Pte LimitedAdd : 18 Kaki Bukit Road 3 #04-11 Entrepreneur Business Centre Singapore 415978Tel : (65) 6848 9238Fax : (65) 6848 9258

For agents in other countries,please contact Hong Kong office

MM POWERPLUS BUSWAY