This standard is equivalent to international standards IEC455 (1988) "equipment terminals and conductor wire ends specific identification and application of an alphanumeric system General." This standard specifies the subject matter of a variety of methods to identify electrical equipment (hereinafter referred to as the device) terminal, and developed a system of alphanumeric identification device terminals and specific wire line side of General. This standard applies to the identification mark of terminals combination of devices (such as resistors, fuses, relays, contactors, transformers, rotary motors, etc.) and these devices, but also to identify specific wire line side. Necessary terminal wire suppliers, these General gives detailed application of certain products and the necessary support recognition in the relevant standard. Reference Standard GB 4728 Graphical symbols GB5465 electrical and electronic equipment with graphic symbols drawn from the power transformer winding terminal number identifying common with two windings, that is, a primary and a secondary winding, so there are four terminals. Some power transformers to prevent hum and other disturbances, the early, often adding a secondary winding between the shield, which shields the ground terminals. Therefore, the power transformer terminals is at least four. 1. Identify common power transformer from the shape of the E-shaped core has two and C. E-shaped core transformer was shell-type structure (core wrapped coils), using D41, D42 high quality silicon steel core, widely used. C-shaped cold-rolled silicon steel core transformer for core, magnetic leakage, small size terminal line price, was the core structure (coil wrapped cores). 2. From the winding power transformer lead terminal number identifying common with two windings, that is, a primary and a secondary winding terminal lines, so there are four terminals. Some power transformers to prevent hum and other disturbances terminal lines wholesale, early, often adding a secondary winding between the shield, which shields the ground terminals. Therefore, the power transformer terminals is at least four. 3. Identify the E-shaped silicon steel laminations way power transformer silicon steel is cross * inserted between E tablets and I do not leave it blank sheet gap, the entire core seamless. Audio input, output transformer pieces left between E and I slice a certain air gap, which is the most intuitive way to distinguish power and audio transformers. As for the C-shaped transformers, power transformers are generally. Cable, Chong Xu Song electronic products factory, cable direct from Dongguan Shijie Song Chong-wook electronic products factory provided. "Terminal, plastic shell connectors, cables, connectors" preferred Dongguan Shijie Song Chong-wook electronic products plant (2), the company is located at: Dongguan Shijie Liu Uk Palit Road 278, over the years, a record Xu Song electronic products factory to provide customers the best quality service, Contact: Mr. Hu. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Chong Xu Song electronic products factory look forward to be your long-term partner!