Motor KW Increased

Among the possibilities are:

• More material than usual is inside the mill.
• The particle size reduction is greater than usual.
• The material is wetter than usual.
• Bearings and seals are beginning to wear or to require lubrication.

"The material is wetter than usual."

Inside mill temperature is more than 110 C. The material (Clinker) coming is fresh

Add to that the fact that it is a wound rotor motor with a liquid resistance controller. If the electrolyte's chemical properties have changed i.e. evaporation, over filling or contamination, the resistance changes and can affect the motor loading at the same setting. Has the proper scheduled maintenance been done and was it done recently, i.e. when the change in performance was noticed?

yes exactly as PW slack & Jreaf replied it is due to material inside the ball mill & starter

Regarding the Liquid starter it is present only at the Starting time of the motor for some time. It is not present at all time. So Apparently Problem isn't with the Liquid Starter

You may have problem in bearing or in coupling to load or chack the motor balance with load shaft.

Everything was O.K but the voltage was little higher i-e approximately about 6520 V