This standard specifies the terms and definitions, classification, codes and markings, technical requirements, test methods, inspection rules, markings and nameplates, packaging, transportation, and storage of parallel active power filter devices for building electrical purposes. This standard applies to parallel active power filter devices (hereinafter referred to as devices) with a frequency of 50Hz and a rated working voltage not exceeding 100 (or 1140) V in the distribution system of civil and general industrial buildings. 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 191 Packaging, Storage, and Transportation Pictorial Markings GB/T 2900.1 Basic Terminology of Electrical Terminology GB/T 2900.33 Electrical Terminology Power Electronic Technology GB/T 3797-2005 Electrical Control Equipment GB/T 4025 Basic and Safety Rules for Human-Machine Interface Markings and Identification Coding Rules for Indicators and Operating Devices GB/T 4208 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 7251.1-2005 Low Voltage Switchgear and Control Equipment Part 1: Type Testing and Partial Type Testing Complete Equipment GB7947 Basic and Safety Rules for Human Machine Interface Marking and Identification GB/T 13384 General Technical Conditions for Packaging of Mechanical and Electrical Products GB/T 14549-1993 Power Quality Public Power Grid Harmonics 3 Terms and Definitions GB/T 2900 1. GB/T 2900 The terms and definitions defined in 33 and the following apply to this document. 3.1 Shunt active power filtering equipment uses power electronic devices as the main circuit power devices. It can achieve filtering function by generating corresponding harmonic currents in real-time and instantly offsetting the harmonic currents in the power grid. Fundamental (component) performs Fourier series decomposition on periodic AC flow. The obtained frequency is the same as the power frequency component. [GB/T 14549-1993. Definition 3.3] 3.3 Harmonic (Ccomponent) performs Fourier series decomposition on periodic AC flow to obtain components with a frequency greater than an integer multiple of the fundamental wave rate. [GB/T 14549-1993. Definition 3] 4
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