When the body length over 6 times the diameter of the turbines in Shandong, the second critical speed of the rotor will be close to the motor running speed turbines manufacturers, running a large vibration may occur. Therefore, the size of large high-speed turbo-generator rotors are strictly limited. About 100,000 kilowatts of its rotor size air-cooled motor has reached above the limit size, again increasing the motor capacity only by increasing the electromagnetic motor load to achieve. So we must strengthen the cooling of the motor. So 5 to 10 million kw turbine generator have adopted better cooling hydrogen-cooled or water-cooled technology. In order to facilitate production management and use of the national standard GB2819 of model for diesel generator sets made uniform provisions. Model and Notation Meaning units arranged as follows: 1, the unit's rated output power (KW) is represented by a number. 2, the type of unit output current: G- AC power frequency; P an AC IF; S a dual exchange; Z DC 3, type units: F- land use; FC a Marine; Q- car station; T a Hanging (trailer) cars. 4, the control unit features: the absence of a manual (common type); Z- automation; S- low noise; SZ- low noise automation. 5, the design number, expressed numerically. 6, variant code, expressed numerically. Wholesale Generator | Weifang Huadong (certified) | generators provided by Weifang Huadong Engine Co. Weifang Huadong Engine Co., Ltd. (www.hdchai.com) is an industry leader in Shandong Weifang, the internal combustion engine, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Weifang East leaders with the staff warmly welcome all inquiries negotiations to create a better future Weifang East.