The Z series DC motor (center height: 100mm-450mm) can be used in various industrial field, such as rolling mill, metal cutting machine tool, papermaking, dyeing and weaving, printing industry, cement factory, plastic extrusion equipment and so on. They are suitable in areas where wide-range speed adjustment is needed and the overloading capacity does not exceed 1.6 times of rated torque. Upward speed adjustment by constant power weak field method can reach 1.0-3.0 times of rated speed. Downward speed adjustment by constant torque and decreased amature voltage method can reach 20r/min. Ratings are applicable to S1 continuous operating under the following conditions: Altitude above sea level: < 1000m Temperature of coolant: < 40ºC Operating according to the technical data sheet. Insulation Class: F Power range: 1.5kW--600kW Standard Rated voltage: 160V/440V Base Speed:3000 (1500/1000/750/600/500/400/300/200) /rmin Exciting method: separated excitation Exciting voltage: 180V In the context of power supply by single-phase bridge rectifiers, for 160V (Rated voltage) electric motor, usually need be working with inductor, the inductance values of circumscribed inductor must be clarify on the motor's nameplate. For 440V (Rated voltage) electric motor, there's no need for circumscribed inductor Z4 motor are the standard series of DC motors confirm to Germany Regulation of VDE0530.