Modern Mining November 2015

PRODUCT News

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MODERN MINING

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November 2015

Index to advertisers

AEL Mining Services

OBC

Afrimat

Air Liquide

Allied Crane Hire

Bara Consulting

Barloworld Equipment

Barloworld Power

Beka Schréder

Bell Equipment Company

IFC

Brelko Conveyor Products

DRA Projects SA

30-31

Flexicon Africa

FLSmidth

Joy Global Africa

Kröhne

Liviero Group

MDM Engineering

Messe München

Mining Indaba

IBC

MMD Mineral Sizing

Multotec Group

PANalytical

Simantel

Torre Lifting Solutions

VBKom

Veyance Technologies SA

WorleyParsons

OFC

Zest WEG Group

Two models added to circuit breaker line-up

The addition of two new models to the

WEG MPW range of motor protection cir

cuit breakers will offer customers a broader

range fromwhich to select the most appro

priate protection for electric motors. All

motor protection circuit breakers in the

range are manufactured in accordance with

IEC 60947 and UL 508 international stan

dards, giving absolute assurance in terms

of operational parameters and quality.

These devices offer the major ben

efit of being compact and modular, which

allows space saving within the electri

cal panel itself. This means that the panel

can be smaller or, where necessary, more

components can be included in the panel.

Engineered to withstand harsh operating

conditions, the motor protection circuit

breakers are robustly constructed for opti

mal reliability.

The range facilitates the protection of a

wide range of electricmotors from0,16 A up

to 100 A. Significantly, the WEG MPW range

has both thermal magnetic versions which

provide protection against any potential

short circuit and overload conditions and

magnetic only versions which provide pro

tection against short circuits. Use of the

thermal magnetic device will reduce the

number of components required when

manufacturing a motor control centre and

this can translate into a significant cost

saving. The magnetic-only version allows

the use of electronic overload protection

devices which can reduce costs further.

This motor protection circuit breaker is

available with a full range of accessories

including auxiliary contacts, shunt trips,

under voltage releases, door mounting

handles and free standing enclosures.

Zest WEG Group, tel (+27 11) 723-6000

Designed and built to strict Caterpillar

specifications, Cat wheel rims help ensure

better drive train performance and

extended component life in off-highway

trucks by combining the highest level of

strength with the minimum amount of

weight to maximise payload and decrease

fuel costs.

“By functioning as an integral part of Cat

drive train systems, these rims help extend

the life of all power transmitting compo

nents, as well as the suspension, bearings,

brakes and tyres,” explains Barloworld

Equipment Senior Product Manager Wally

Parsons. “This is why tyre selection and

fitment is such an important part of the

overall production planning on any mine.”

(Barloworld Equipment is Caterpillar’s

Southern African dealer.)

Tyre removal and installation is a

specialised area. It can also be a time con

suming exercise when using standard

rim configurations. Traditionally, the only

way to change the rear axle inside tyres

on a mining truck has been to remove

the entire outside tyre and associated rim

systems. On average, this process takes

between six and seven hours to complete

by a well-trained team.

Caterpillar’s Quick Change Rim (QCR)

system has reportedly revolutionised

this practice and greatly contributed to

improved production efficiencies by reduc

ing change-out times to around two hours,

due to fewer rim base removal and instal

lation procedures. As a result, the system is

proving particularly popular with large and

ultra size mining truck fleet owners. Key

models using QCRs include the Cat 785C,

Faster, safer tyre change-outs with Cat wheel rims

Caterpillar’s QCR system provides longer rim life, im-

proved safety, and reduced tyre maintenance time.

Cat 785D, Cat 789D, Cat 793D and F, Cat

795F, as well as the range-topping Cat 797F.

The QCR system has a position specific

outer rear rimwith separate dual bead seat

bands and flanges. These components

allow the tyre and rim components from

the inner rear rim to slide over the outer

rear rim. The key factor here is that the sys

tem allows the inner and outer tyres to be

removed and replaced without having to

remove the rear axle outside rims.

The back section of the QCR base is

modified to include additional lock ring

and O-ring grooves for a second bead seat

band, which allows the tyre to be removed

without the need for a hydraulic bead

breaker tool to separate the inner tyre

bead from the rim base.

“The lock ring is a single piece design,”

explains Parsons. “It’s made with spe

cially designed materials that allow it to

be expanded for easier attachment and

removal. Compared with other aftermar

ket quick change rim systems, it’s the only

one that is interchangeable between all six

tyre positions.”

Barloworld Equipment, tel (+27 11) 929-0000