This standard specifies the terms and definitions, technical requirements, testing, marking, packaging, transportation, and storage of semiconductor excitation devices for synchronous motors. This standard applies to synchronous motor semiconductor excitation devices (hereinafter referred to as devices) installed indoors for light or heavy load starting, voltage reduction, or full voltage starting. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 156-2007 Standard Voltage GB/T 762-2002 Standard Current Level GB/T 3797-2005 Electrical Control Equipment GB/T 3859 (All Parts) Semiconductor Converters GB/T 4025 Basic and Safety Rules for Human-Machine Interface Identification: Coding Rules for Indicators and Operating Devices GB42082008 Housing Protection Level (IP Code) GB/T 4588.1 Sectional Specification for Single and Double sided Printed Boards without Metallized Holes GB/T 4588.2 Sectional Specification for Single and Double sided Printed Boards with Metallized Holes GB/T 7947 Basic and Safety Rules for Identification of Human Machine Interface Marks GB/T 18494.1-2001 Converter Transformers Part 1: Industrial Transformers 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 Excitation Assembly is a device that provides excitation current for synchronous motors, including an exciter and all regulating and control components, as well as field suppression and protection devices. 3.2 Rated field current The direct current in the excitation winding of a synchronous motor when operating at rated voltage, rated current, rated power factor, and rated speed. [GB/T 10585-1989,4.5] 3.3 Rated Field Voltage When the cooling medium is at the highest temperature and the motor excitation winding is at the temperature corresponding to the rated load and rated conditions, the DC voltage that needs to be applied at the motor excitation winding end to generate the rated excitation current
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