Terminal line wholesale | Chong Xu Song electronic products plant (Certified) | terminal line from Dongguan Shijie Song Chong-wook electronic products factory provided. Dongguan Shijie Song Chong-wook Electronic Products Factory (chuangxs.1688.com) is specialized in the "terminal, plastic shell connectors, cables, connectors" of the enterprise, the company adhering to the "honesty, hard service" concept, for You provide the highest quality products and services. Welcome to inquire! Contact: Mr. Hu. Comprehensive consideration of low-voltage equipment working environment, impact insulation coordination to the following factors: the rated voltage associated with the device; rated insulation voltage; by the device during operation overvoltage rated impulse voltage is determined. Another environmental conditions such as: temperature, humidity, solar radiation, heating, ventilation, dust, water vapor and the like; other factors such as: pollution, material properties (tracking index CTI) terminal lines preferred voltage action time, frequency, altitude (atmospheric pressure), the field conditions, a uniform electric field; non-uniform electric field. Since the solid insulation material defects (such as impurities, the air gap) terminal line brand presence, though still far less than the breakdown voltage level, but will still be due to partial discharge and damage its life. Damage the solid insulation material has accumulated in the course of the life of a process, because this process is unrecoverable eventually lead to the breakdown or aging loss of performance. In the high-frequency voltage is applied to terminal line production, material dielectric loss and partial discharge intensifies will reduce service life. Sanmen Bay appliances and other electronics engineer recognized simply by increasing the thickness of the insulation structure terminals in order to obtain long-term ability to withstand voltage is inappropriate, only to obtain satisfactory results only through rational design. Specific to the design method must determine the minimum clearances; minimum creepage distances; or adding some auxiliary measures: applying an insulating material; installation of insulating sleeve or insulating liner; Shop lining insulating film; pollution and moisture, etc. Summing up. above, used in low-voltage electrical equipment from electrical strength insulation coordination terminals electrically insulating material is far greater than the strength of the air, so when the terminals insulation clearances were designed to meet the requirements, should adopt creepage distance way cable, an increase of solid insulation between two conductive isolation. Voltage transformer is a voltage conversion device. It is converted into low voltage high voltage in order to reflect changes in the magnitude of the high pressure with low pressure values. Thus, by measuring the voltage transformer voltage can be directly used ordinary electrical instrumentation. As a result of voltage transformers, various measuring instruments and protective devices are not directly connected to the high voltage meter to measure in order to ensure the safety and protection work, but also to solve the difficulties of high voltage insulation measuring manufacturing processes. In addition, since the secondary side voltage transformers are 10 volts makes measuring instruments and relay coil voltage to standardize manufacturing. Structure and working principle of common transformer voltage transformer with the same, it is also the core, primary winding, secondary winding, terminals and insulation support and other components. Voltage transformer primary winding is connected to the system line voltage or phase voltage insulation should vary with the actual system voltage level may be. The primary winding has more turns, the secondary winding turns rarely supply voltage meter or relay coil. Do not allow the voltage transformer secondary winding is shorted. Secondary winding 10 volts, should be connected to be able to withstand 10 volt circuit, the current which passed by a secondary circuit impedance to determine the size. The secondary is shorted, the impedance is very small, the current flowing through the secondary circuit is increased, resulting in secondary fuse blown impact protection meter indication and cause malfunction, damage to the voltage transformer. Voltage transformer secondary circuit must be grounded to prevent a secondary breakdown of high voltage insulation damage to the secondary side of the string to be hazardous to personnel and equipment.