MoSi2 Heating Element
(Kanthal Super Elements TM*)
- This kind of heaters increase resistivity sharply with temperature.
- The graph in this page 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.
*Brand Property of Sandvik Corporation