Lead terminal identification number from the winding power transformer has two windings common, namely a primary and a secondary winding, so there are four terminals. Some of the power transformer to prevent hum and other disturbances terminals, the early, often between the secondary winding plus a shield, which shield the ground. 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 structure (core wrapped coil), using D41, D42 high quality silicon steel core, widely used. C-shaped cold-rolled silicon steel core transformer as the core, magnetic leakage, small size, was the core structure (coil wrapped core). 2. From the winding leads to the number of terminals to recognize the power transformer has two windings common, namely a primary and a secondary winding, so there are four terminals. Some of the power transformer to prevent hum and other disturbances cable terminals, the early, often between the secondary winding plus a shield terminal models, the shield is ground. Therefore, the power transformer terminals is at least four. 3. Identify the E-shaped silicon steel laminations way power transformer silicon is cross * inserted between E tablets and I do not leave it blank sheet gap, the entire core match exactly. Audio input, output transformer piece 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. Bus and bus or bus terminals and electrical insulation terminal, when a bolt lap joint, shall meet the following requirements: a, hole diameter and length of the various types of lap lap bus connections comply with the specifications in Appendix C of the regulations, Tighten with a torque wrench to tighten the bolt torque values ??of steel connections comply with Appendix D of this specification; b, busbar contact surfaces clean, grease-coated composite electricity, no glitches around the bolt holes; c, connecting both sides of the bolts have flat washers, adjacent there is a gap between the washer more than 3mm, nut side is equipped with a spring washer or locknut; d, bolt by force, not to the electrical terminals subject to additional stress. Terminals, electronic products factory Song Chong-wook (certified), Qingyuan terminal by Dongguan Shijie Xu Song Chong electronic products factory provided. Dongguan Shijie Xu Song Chong Electronic Products Factory (chuangxs.1688.com) (www.chuangxs.1688.com) is Dongguan, connectors leaders, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. Song Chong-wook in electronic products plant leadership with the staff warmly welcome all inquiries negotiations to create electronic products factory Song Chong-wook a better future. You can also access (www.chuangxs.1688.com/supply_details_40879655.html), for more information about the company.