WEG Transformers Africa

The companies

Weg Transformers Africa repair, supply and service transformers, miniature

substations and switchgear for mines, local municipalities and companies across a variety

of economic sectors.

WTA Heidelberg, Gauteng, together with WTA Wadeville ,Gauteng and WTA

Richardsbay (the Kwa-Zulu Natal Branch), custom manufacture products to industry

standards, and will repair and refurbish existing units, either on the client’s site or if

required at the company’s in-house manufacturing facility. All items are designed and

manufactured to SABS 780 and ISO 9001 standards, emphasising quality materials

and professional workmanship, in line with the company’s best practice principles.

WTA Heidelberg designs and manufactures resin cast switchgear. This switch is

commercially known as the Interswitch B 20. The NX3F Tiger will also be also be

manufactured in Heidelberg.

WTA BUSINESS OVERVIEW

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WTA PRODUCTS & SERVICES

All distribution and power

transformers are manufactured

to SANS780, BS171, and IEC159

specifications under ISO:9001

quality standards

Distribution and Power transformers

• The manufacture of new transformers, from 10 kVA up to 100 MVA and 132kV

• The repair and rewind of transformers up to 100 MVA and 132kV

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Mini-substations

• The manufacture of new mini-substations, up to 1600 kVA, and 33kv

• The repair and rewind of mini-substations, up to 1600kVA and 33kV

MV switchgear

• The supply of new switchgear, for voltages from 3.3kV to 33kV

• The repair and service of switchgear, in house and on site

• The manufacture of resin cast switchgear, for voltages up to 11kV (SANS Approved)

• The manufacture of oil fused ring main unit (NX3F Tiger)

PRODUCTS & SERVICES

Laboratory services

A sophisticated in-house laboratory is used to test and analyse transformer oils. These

tests can detect markers and other harmful substances in the oil, which can then be

rectified.

Sample analysis includes:

• Key gas detection

• Water detection

• Acidity measurements

• PCB (polychlorinated biphenyls) detection

• Furan detection

Field services

Field services include both mechanical maintenance work and on-site

oil purification and regeneration.

Field maintenance:

• The purification and regeneration of industrial oils on site

Field repair services:

• The maintenance and repair of transformers up to 100MVA, and

switchgear up to 132kV

All insulation oils tests are

performed in compliance with

SANS555 standards

+

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Maintenance and repair services

• The replacement of leaking gaskets, neoprene cone rubbers, bushings, inspection covers

on on-load tap changers, conservators, valves etc

• Sandblasting and spray painting of transformers and components

• The supply and testing of protective relays

• The supply of silica gel and breathers

• Infrared surveys

• In-house refurbishment and repairs of transformers include complete rewinds, re-gasket,

vacuum treatment and drying of cores, sandblasting, spray painting and complete testing of

units to SABS and IEC standards

Dedicated technical field

teams are available 24/7,

enabling rapid response

to service calls

PRODUCTS & SERVICES

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Quick services:

The company offers a unique personal repair service that is available

around the clock. Critical to the operation of clients’ processes

and operations, the products supplied by WTA form an integral

part of clients’ supply chain. As such, rapid response and

service is integral to the good business offering of WTA. Further to

this, the company offers best-in-sector manufacturing turnaround,

with custom product deliveries usually occurring within 10 – 14

weeks, while spare parts are usually available off the shelf.

Turnkey manufacturing:

The company’s extensive in-house manufacturing capabilities

give it compelling advantages over its competitors in maintaining

full control over the entire developed system, both in terms of the

quality and the costs of the manufacturing process. This means

that customers enjoy highly competitive pricing as well as a

consistent, integrated and complete service.

Manufacturing excellence:

Stringent quality control is exercised over all products leaving the

factory, including paintwork, labels and gaskets. Failure rate on

WTA transformers is significantly lower than industry

standard at approximately only 0.1%. WTA also incorporates

a pre- and post tanking inspection to ensure the highest level of

compliance. Manufacturing is completed under stringent

ISO:9001 quality controls.

Record keeping:

The company is one of only a few that keeps maintenance

records on behalf of its clients, a process which ensures the

continuity of information. This service is important for insurance

purposes and the difficulties associated with staff turnover at

its clients.

PRODUCTS & SERVICES – KEY DIFFERENTIATORS

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Stock levels:

In order to facilitate consistent market demand, WTA

maintains high levels of a diverse range of stock. This means

that customers are able to rely on WTA for swift access to crucial

spares and new units which are often critical to their needs.

Practical experience:

Technicians have daily hands-on experience of dismantling and

building transformers, switchgear and mini-substations, from a

variety of manufacturers, giving them a thorough understanding

of both the industry and their customers’ needs.

Capacity:

Currently, WTA manufactures approximately 180 mini-

substations and 600 transformer units a year. Combined

facilities could accommodate rapid expansion of services and

manufacture.

High voltage test facilities:

WTA boasts with 3 individual test labs. WTA Heidelberg is

capable of testing up to 100MVA 132kV (IEC and BS) .

Wadeville operations can test up to 10MVA 66kV

PRODUCTS & SERVICES – KEY DIFFERENTIATORS

Equipment:

The workshop boasts a 120 tonne overhead crane allowing

access to hard to reach existing installations. A variety of mobile

cranes, including a low-bed crane truck, enable WTA to

collect break-downs and deliver replacements at client sites.

Staff are able to immediately load, collect and repair

transformers of up to 25 tonnes.

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The market

The company is active in the following industrial sectors, demonstrating a diverse range of clients, and thus a well-hedged revenue flow:

CUSTOMERS & MARKETS

Commercial Industrial Mining Civil development Local government Utilities Telecommunication

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LOCATION & PREMISES

Heidelberg, Gauteng

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6mm “High risk”

Eskom approved

Rapid growth

Southern Africa is experiencing a growing demand of new and

refurbished electrical equipment. The WTA group has a clear

and defined strategy moving forward to capitalise on this

growth, including the following specific projects:

Business opportunities:• The company has identified growth opportunities in the repair

of power transformers and the supply of new distribution

transformers in the local market.

• Excellent export opportunities exist in Africa where a number of

new power stations and new infrastructure is being built, and the

refurbishment of existing equipment is required.

Equipment to increase productivity:• To manage demand, the WTA has acquired another foil

winding machine to assist the 1400 mm CNC foil winding

machine and two CNC high voltage winding machines that will

allow the company to improve its production rate and to

tender for higher volume orders than it can presently manage.

FUTURE GROWTH

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WTA@zestweg.com

Thank you