The wiring terminal specifies a standard identification method

The prefix symbol for the high-level code of the wiring terminal is "=", such as=M3, location code, and prefix symbol is "+", such as+D123, type code, and prefix symbol is "-", such as - K6 terminal code, and prefix symbol is ":". If the project code is not confused in the drawing, it can be omitted. For example, in the electrical schematic diagram, - KA2 represents "relay with number 2", which can be simplified as KA2. For example, for the current terminal JQH8-12 of the relay protection device, J represents the meaning of the wiring terminal, QH8 represents the SMW brand -8 is the 8th series, and -12 represents the meaning of 12 digits

This standard specifies various methods for identifying wiring terminals of electrical equipment (hereinafter referred to as equipment), and establishes general rules for identifying equipment wiring terminals and specific wire terminals using an alphanumeric system. This standard applies to the identification marking of wiring terminals of equipment (such as resistors, fuses, relays, contactors, transformers, rotating motors, etc.) and combinations of these equipment, as well as to the identification of specific wire terminals. When necessary, The detailed application of these general principles and necessary auxiliary identification methods for certain products can be provided in relevant standards.

The functional classification of wiring terminals, such as Nanjing Sanmenwan, includes ordinary terminals, safety terminals, test terminals, grounding terminals, double-layer terminals, double-layer conduction terminals, three-layer terminals, three-layer conduction terminals, one in and two out terminals, one in and three out terminals, double in and two out terminals, knife switch terminals, overvoltage protection terminals, marking terminals, etc. According to current classification, it can be divided into ordinary terminals (low current terminals) and high current terminals (over 100A or 25MM wires). Classified by appearance. It can be divided into rail type terminals (such as JH1, JH2, JH5, JH9, JHY1, etc.) fixed terminals (such as TB, TC, X3, X5, H series, JQH8-12, JQH8-12B, JQH8-12C, etc.), circuit board terminals (PCB terminals), etc