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Power Converters for Industrial Application
Power Supply System
Power Electronics & Automation
FRIEM S.p.A. - Via Edison, 1
20090 Segrate - Milano - Italy
Phone: +39 02 87235350 Fax: +39 02 26923036
Internet: www.friem.com E-mail: sales@friem.com
ISO 9001-2008
STANDARD
Power Converters for Industrial Application
Protection Features
Since 1950 FRIEM has designed, manufactured and delivered all over the World Power Converters for:
Chlor-Alkali
Metal Refining
DC Arc Furnaces
Graphite Refining
Heating Process
Thanks to the experience matured in sixty years of activity FRIEM is now capable of supplying air, water and deionised
water cooled Rectifiers giving the customer a complete Conversion System tailored on his application and complying
with IEC or ANSI/IEEE Standards.
FRIEM designs all the equipment of the Conversion System in accordance to the customer’s plant requirements
to grant the maximum efficiency and reliability.
• O/C, O/V, U/V Phase Sequence Protection
• Automatic Protection against Output Circuit Opening
• Semiconductor Protection and Alarm devices
• (N-1) or (N-2) Semiconductor redundancy
• Supervision and control of Current Sharing between
Electrolysis Cell Lines in parallel
• DC Earth Fault Protection
• Full Temperature Monitoring and Thermal Protection
• Cooling Circuit Monitoring (Pressure, Flow Rate, Conductivity)
FRIEM SCOPE
OF SUPPLY
M.V. Switchgear
Operating Characteristics
FRIEM is capable of providing to the customer
a complete package, including:
• MV Switchgear
Conversion
Transformer
• Conversion Transformer
• Power Converter
• High Current Switching System
• Busbar System
• DCS System
AC
Busbars
Remote
Control
Serial Comm. Bus
• Remote System Supervision
Load and Earth
Isolators
• Interphase and Smoothing Reactors
• Power Factor Improvement and Harmonic
Filter System
Capacitor Bank
and
Harmonic Filter
Local
Control
Power
Converter
• Connection: Bridge - Double Bridge (Series or Parallel) Double Star - 2 Double Star - DC/DC Converters (Step-Down)
• Type: Diode, Thyristor, IGBT
• Cooling: Air, water, deionized water
• AC Input Voltage: Up to 220kV-3 Ph., 50 or 60 Hz
• DC Output Voltage: Up to 1500V
• DC Output Current: Up to 160kA in only one Rectifier Cubicle
• Modular Design: Flexible solutions
• Control: ±0,5% standard accuracy Digital Current
Regulation by:
- Thyristor phase firing delay
- IGBT switching control
- On Load Tap Changer and Saturable Reactors for
Diode Rectifier
Voltage and Power Regulations are also available
Load
Busbars
CUSTOMER
PRODUCTION
PROCESS
FRIEM Rectifier Advantages
Design and Manufacturing Characteristics
FRIEM’s 60 Years Experience in Power Conversion grants:
Power Section
Control Section
• Exclusive Aluminium extruded Busbars
• High efficiency and high dynamic stress withstand
• High reliability and long life operation due to reduced
operating temperatures
• Optimised Nr. of Semiconductors and N+1 Valves
redundancy as standard
• Non-Magnetic material Rectifier Cubicle
• Simplified design of Transformer’s Phases Connections
• Easy maintenance
• Digital regulation (FRIEM DRP) for Diodes, Thyristor and IGBT
• Original FRIEM electronic boards
• PLC and OP control and automation (different brands
available)
• Hot and warm PLC redundancy
• Fiber Optics Control Connection
• All PLC brands available
• Local, Remote and SCADA control
• Remote control via Modem/Internet
Cooling Section
DRP Digital Regulation
• Deionised to raw water Cooling System (dWFWF)
• Deionised water to forced air Cooling System (dWFAF)
• Monitoring of temperature, underpressure, min flow,
min and max level, high conductivity of deionised water
• 50% or 100% redundancy
• Open or enclosed section
• Easy maintenance
• 15kHz Sampling Frequency
• High accuracy regulation of current, voltage and power
• Reading and recording of all main measurements and events
• Current and Voltage Oscillographic recording and Load Profile
• Easy and fast setting of the Regulation and Protection
Parameters
• Reduced commissioning and start-up time
Reliability and Continuity of production
• N+1 Semiconductors redundancy
• Cooling System redundancy
• Control System self diagnostic
Efficiency
• Proprietary internal Busbar design with reduced losses
• Simplified design of Transformer-Rectifier Connection
Fast Operation
• Reduced delivery time thanks to Modular Design
• Reduced installation and commissioning time
• Fast Start-up and operation tuning with the new
Digital Regulator
Safety
• Latest IEC and ANSI/IEEE Standards
• FRIEM design protection devices
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