Y-H Series are totally-enclosed,fan-cooled three-phase marine motors of the squirrel-cage type.The motors are suitable for driving various machines on ships such as pumps,blowers,separators,hydraulic engines and other auxiliary equipment. Y-H Series is a design variation of the brand-new Y series developed recently and noted for its high-efficiency and starting torque. The motors are designed accordance with National Standard GB755"Rotating electrical machines-Rating and performance"and the existing"Rules for the construction of sea-going steel ships." The motors also comply with the relevant requirements of the following standards and specifications. IEC60034 Roationg electrical machines IEC60068 Basic environmental testing procedures IEC60072 Dimencions and output ratings for rotating electrical machines IEC60092 Electrical installation in ships The motors are also in conformity with part of the specifications of the following ships classification societies. LR Lloyd's Register of Shipping GL Germanischer Lloyd NK Nippon Kaiji Kyokai