Motor Facts

Upto 30 KW DOL starters are used, above that, y-Delta starters are used.

For motors rated 55 KW+, motor heaters are used.

For motors rated /. 90 KW, PTC Thermisters are used.

For all motors rated 90 KW +, the vendor should furnish following data soon after submission of T-S curves and G D sqaure value of the driven equipment:- (This data is required for selection of proper motor protection relay).

• Thermal Withstand Curve: Hot and Cold.
• Stator Time Constant.
• Stalling Current.
• Stall Withstand:Hot and Cold
• Starting Current.
• Acceleration Time.