MICROELETTRICA POWER DEVICES (PTY) LTD LEADERS IN POWER ELECTRONICS

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MICROELETTRICA POWER DEVICES (PTY) LTDLEADERS
IN POWER ELECTRONICS
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INTRODUCTION

• History of the company

• Established 1988
• Founded by Mike Burger
• Grew from 4 employees to 21
• Current Location Honeydew (JHB)

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INTERNATIONAL STANDARDS APPROVALS
Although Power Devices has not yet obtained ISO
9000 listing we have been periodically audited
and approved by many of our major customers such
as Spoornet.
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INNOVATIONS

• Bonded-fin heatsinks have revolutionised thermal
  management of power semiconductors.
• Fibre-optic monitoring of rectifiers
  substation parameters has been written into
  railway specifications.
• Inverse thinking on the construction of high
  power rectifiers has changed tender specification
  for maintenance.
• The first combined water-cooled power
  semiconductor / fuse units are now virtually
  industry standards in high power rectifiers

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OUR AIM

• Dedicated to the design, development and
  manufacture of high-performance power
  semiconductor modules, units and assemblies.
• Aim for designs
• Compact.
• Anticipate the users needs for terminations and
  auxiliaries.
• Accommodates the requirement of rapid
  maintenance on-site.
• Aesthetically, to complement the equipment into
  which it is installed.
• To operate in harsh environments.
• To meet international quality standards.
• The quality of our product should enhance the
  sales potential of yours.

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CLIENTS

• Railway Industry
• Transnet
• Metrorail

• Mining Industry
• Palaborwa Mining
• Xertech / Wonderstone

• General Manufacturing Industry

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TRACTION EQUIPMENT

• Rectifiers
• AC/DC Panels
• Battery Chargers
• Track Breakers
• Isolator Panels
• Complete Substation Refurbishments

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AURUM SUBSTATION
Microelettrica Power Devices was responsible for
the design, supply, installation and
commissioning of a 3KV rectifier, AC/DC control
panel, protection and control cables and complete
overhaul of primary circuit breaker.
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TRACTION RECTIFIERS
Microelettrica Power Devices is a leader in the
design and development of compact, ultra reliable
3kV DC substation rectifiers.
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BATTERY CHARGERS
Microelettrica Power Devices is a leader in the
design and development of high reliability
substation chargers.

• The chargers are configured with main
  transformer, fully controlled secondary thyristor
  rectifier, output load resistor and DC filter
  choke.
• Thyristor control is via the industry standard
  P4500 analogue card, which allows for the firing
  of of thyristors in inverse parallel or DC bridge
  configuration with voltage and current feedback.

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SF6 PRIMARY CIRCUIT BREAKER
Through years of collaboration with Consolidated
Power Maintenance, Microelettrica Power Devices
has been responsible for the wiring and
commissioning of SF6 Breakers
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WONDERSTONE
Reverse-polarity water-cooled thyristor
controlled rectifier
The control system on this rectifier was
developed by Microelettrica Power Devices and is
the first of its kind in South Africa.
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MEGAWATT POWER
High Power Heavy Industrial Equipment
Rectifier with saturable reactor control for
Manganese refinery.

• 25 kA/185V water-cooled 12 pulse Hexaphase with
  IPT configuration.
• Single diodes with series fuses each monitored
  for temperature by PT 100 encapsulated elements.

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MEGAWATT POWER
High Power Heavy Industrial Equipment
Rectifier with saturable reactor control for
Manganese refinery.

• 25 kA/185V water-cooled 12 pulse Hexaphase with
  IPT configuration.
• Single diodes with series fuses each monitored
  for temperature by PT 100 encapsulated elements.

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MEGAWATT POWER
High Power Heavy Industrial Equipment
16kA/159V water-cooled thyristor controlled
rectifier for copper winning
Installed at Palaborwa Mining Company
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MEGAWATT POWER
High Power Heavy Industrial Equipment
Water-cooled bridge for Plasma-Arc Furnace

• 5 kA/220V single phase Bridge with water-cooled
  presspack diodes and fuses

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HIGH MEDIUM POWER
Other specialised products include
Water-cooled Power Packs
Powerbase Modules
High-performance Heatsinks
Isolation and Bonding
Power Stacks
Power Semiconductors
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OTHER SPECIALITIES
R D Facilities
Our industrial testing facility is currently
being rebuilt for higher power.
R D Facility All our products start here.
Pilot runs are first made in R D and followed
by batch production.
Test results are recorded to ISO 9001 Spec.
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OTHER SPECIALITIES
In-house Publishing

• All marketing material is done in-house. This
  includes Banners, Manuals, Catalogues and
  Pamphlets.

• Microelettrica Power Devices has the facility to
  produce electronic prototype 3 dimensional
  drawings.

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We Thank You Power Devices was acquired by
Microelettrica in December 2003 with members of
the original management team. This presentation
was prepared for Microelettrica Power Devices
(Pty) Ltd. by Liz van Tonder