I have checked each and everything at panel, CRD upto the Electromagnets, it is a circular magnets used for filling Transfer Car Trolley with Scrap at Steel Melt Shop, but i have noticed one thing, when i magnetize the magnet it magnetized but when i drop the magnet the DC Contact or of the magnet produces a huge flash with fire. it is also taking 120 Amp instead of 100 amp, the variate along diode also burns out while dropping the scrap means demagnetizing the electromagnet, which circuit i must have to check for this condition.
You need to supply a lot more info before anyone can help you troubleshoot the problem. Pictures or at least a make and model of the controller (Square D, Ohio, etc,) and also the magnet. Is the magnet the original one on this machine or a different one? Usually when the current draw rises this much it is usually an indication of a short in the windings, a generator that is running at too high voltage (above 250 volts) or someone replacing the magnet with another of different specs. A make and model of the magnet along with a resistance reading, taken at the magnet with cables disconnected will narrow the current draw problem. Many times constantly overheating the magnet and not maintaining good sealed connections at the lug box can cause this. The flashing at the contactor could be because of the excessive current draw (above rating of controller) or a misadjusted dribble contact or timer relay. Again a model and make is necessary for us to help you.