Steel heating threatment

steelfurnace

Electrical furnace controlled by SCR/Thyristor:

 

  • Solution Heat Treatments
  • Forging
  • Furnace & Soaking Pits
  • Galvanising & Aluminising Lines
  • Blast Furnace & Stoves
  • Anneling & Coating Lines
  • Sinter Strands
  • BOS Plants
  • Aluminium Age Hardening
  • Coking Plants
  • Continuos Casting Lines
  • Melt and Reheat Furnaces
  • Extrusion

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SiC Touch Panel

sic-panel
CD Automation has developed many applications dedicated to drive particular loads and one of these application is for Silicon Carbide.
The Philosopy is to use standard Thyristor units with serial communication and to implement the control strategy inside the intelligent panel.

This Touch Panel in addition to a CD Automation universal unit able to work with all firing and control mode removing all application risks due to the control type selection

 

THIS SOLUTION GIVES MANY ADVANTAGES

R-T curve

  • The Thyristor Units are standard and easy to be found every where
  • An external port is available to connect your normally used PLC
  • One Ethernet port is available on 8 ” touch panels
  • The Human interface is friendly and just feeling few data of thermic project is possible to achive:

Two different modes to drive SIC Burst Firing with automatic adjustment of Power Limit Or Phase Angle with transfer from voltage to Power Control Mode.
This Touch Panel in addition to a CD Automation universal unit able to work with all firing and control mode removing all application risks due to the control type selection.

FEATURES

 

  • Automatic configuration and tuning of the thyristor unit
  • Automatic tuning of Power Control mode VxI
  • Message on when to change the elements because are at the end of their life
  • Automatic switch from Voltage to VxI control mode when the element temperature is the correct one
  • Automatic tuning procedure of Heather break alarm to diagnostic partial or total load failure
  • Diagnostic of fuse failure and Thyristor in short circuit
  • Recent and Historical Curve of following process variable
  • Power density W/Cm2
  • Load Voltage
  • Load Current
  • Power to the load
  • Resistance value curve with element new
  • Time elapsed from start to actual resistance value

All in line with SANDVIK specifications for a long element life. Real time clock for furnace maintenance.

These touch panel is available with different features:

 

  • Model 5″ in black and white
  • Model 5″,8″,10″and 12″ in colour

 

Below Thyristor units can be connected:

REVO-CL to drive 1 phase unit SIC elements or 3 Phase open delta or star with neutral
MULTIDRIVE or 3000E-3PH to drive 3 phase loads in delta or star connection.

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Kanthal Super Touch Panel

 

Kanthal Super increase resistivity sharply with temperature. The graph on below show that at ambient temperature the resistance value is very low and increase its value up to 10 times. To don’t oversize in current the Thyristor unit it’s necessary to limit the current to the load reducing the voltage with phase angle firing and current limit. When the resistance value reach a setted value are possible two types of working method that can be selected from HMI:
Phase Angle plus current limit all the time long
Or
Phase Angle plus current limit when the resistance is cold and transfering to Delayed Triggering if load is coupled with transformer. If the Kanthal Super are coupled directly to the main voltage supply the unit start in Phase Angle plus current limit when the resistance is hot transfer automatically to Burst Firing.
This application is typical for cold resistances and CD Automation has developed its own software to drive these types of loads. The size of the HMI available are 5”, 8”, 10” and 12”.

If the Kanthal Super are coupled directly to the main voltage supply the unit start in Phase Angle plus current limit when the resistance is hot transfer automatically to Burst Firing.
This application is typical for cold resistances and CD Automation has developed its own software to drive these types of loads.
The size of the HMI available are 5”, 8”, 10” and 12”.

FEATURES

  • Automatic configuration and tuning of the thyristor unit
  • Automatic tuning of current Control mode I or I 2 selectable
  • Automatic tuning of Current Limit
  • Automatic transfer from Phase Angle to Delay Triggering if the load is coupled with a transformer
  • Automatic transfer from Phase Angle to Burst Firing with element coupled directly to line supply voltage
  • Automatic tuning procedure of Heather break alarm to diagnostic partial or total load failure
  • Diagnostic of fuse failure and Thyristor in short circuit
  • Recent and historical curve of following process variable
    – Power density W/Cm2
    – Load Voltage
    – Load Current
    – Power to the load
    – Resistance value curve

All in line with SANDVIK specifications for a long element life.
Real time clock for furnace maintenance

BENEFITS

 

  • Phase Angle used just to reach the working temperature of elements with reduction of harmonics
  • High Power factor with furnace working in Burst Firing or delayed triggering
  • The Thyristor units are standard and easy to be found every where
  • An external port on HMI is available to connect your normally used PLC
  • One Ethernet port is also available on touch panel = > 8”
  • The Human interface is friendly and just inserting few data of thermic project is possible to achive the features listed above.

 

The Thyristor Unit suitable to drive these type of load are:

  • REVO-CL to drive 1 phase unit or 3 Phase open delta or star with neutral
  • CD3000E-3PH to drive 3 phase loads in delta or star connection

(1) Kanthal is a registered trademark

 

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