SMiLer is the strong brand enterprise of metallized film capacitors integrating R&D, production and sales.The main products: motor capacitor,capacitor manufacturer,fan capacitor.

What is the difference between safety capacitance and capacitors

by:SMiLer     2021-03-01
Safety capacitor safety capacitance discharge and capacitors, capacitors in the external power after disconnecting the charge will be kept for a long time, if touch will be electric, and safety capacitance is not the problem. In the ac power input, generally need to increase the three security capacitance to suppress the EMI conducted interference. Classification divided into x and y type safety capacitance. The ac power input is divided into three terminals: wire L/N/G of ground zero line, ( L =线,N =中立,G =地面) 。 Across the L - N between wire - namely Zero line is between X capacitor; Across the L - G/N- G, wire - namely Ground wire or zero Y capacitors between the ground. X capacitor: because the position of the capacitor connection is the key, also need to comply with relevant safety standards. X capacitor also belong to one of safety capacitance. According to actual needs, the capacity of X capacitance value allowed is larger than the capacity value of Y capacitance, but this time must be in the X capacitor at both ends of the parallel resistance, a safety to prevent the power cord plug pull, due to the charging and discharging process of the capacitor to the power cord plug charged for a long time. Usually, X capacitor choose ripple current more larger polyester film capacitor. This type of capacitance, the volume is larger, the charging and discharging current is big, but it allows instant and its internal resistance smaller accordingly. Y capacitor: this location is the key of two Y capacitor connections, must need to comply with relevant safety standards, in order to prevent cause leakage or chassis charged electronic equipment, easy to endanger personal safety and life. They belong to safety capacitance, which required capacitance cannot slants big, the pressure must be higher. In general, working in subtropical machine, requirements of leakage current should not exceed 0. 7mA; Work in temperate machine, requirements of leakage current should not exceed 0. 35mA。 Y capacitor, therefore, the total capacity is generally not more than 4700 pf ( 472). 。 Y capacitance of electric capacity must be restricted, so as to achieve control in the role of the rated frequency and rated voltage, the size of the flow through the leakage current and the purpose of the impact on the system EMC performance. GJB151 Y capacitor capacity should not be greater than zero. 1uF。 Y capacitance in addition to conform to the corresponding grid voltage withstand voltage, also claim the capacitor in the electrical and mechanical properties have enough safety margin, avoid short-circuit phenomenon under extreme environmental conditions appear breakdown, Y capacitance pressure performance is of great significance for protecting the personal safety. Y of the capacitance of the special points out: as a security, safety inspection agencies must get the certification. Y capacitor to orange or blue appearance, generally marked with safety certification marks ( Such as UL, CSA, etc) And pressure AC250V or AC275V words. However, the real pressure as high as more than 5000 v dc. Must be emphasized, Y capacitors shall not be arbitrarily use nominal pressure AC250V or DC400V capacitors to substitute. High-pressure ceramics function has the characteristics of wear resistance of dc high voltage capacitor, suitable for high pressure bypass and coupling circuits, low loss of high pressure wafer has lower dielectric loss, especially suitable for use in TV receiver and scanning circuit safety capacitor is used for such occasions, the capacitor failure after, will not lead to electric shock, do not endanger personal safety. It includes the X and Y capacitors. Capacitance is two line jumper in the power line (x L - N) The capacitance between, generally choose metal film capacitors; Y capacitor are respectively jumper in the power line between line and ground ( L - E, N - E) Capacitance, usually come in pairs. Based on the limitation of leakage current, capacitance value Y cannot too big, general level X capacitor is uF, Y capacitor is nF level. Capacitance differential mode interference suppression X, Y capacitor common-mode interference suppression. 1. As a safe Y capacitors, safety inspection agencies must get certification. Y capacitor to orange or blue appearance, generally marked with safety certification marks ( Such as UL, CSA, etc) And pressure AC250V or AC275V words. However, the real pressure as high as more than 5000 v dc. Must be emphasized, Y capacitors shall not be arbitrarily use nominal pressure AC250V or DC400V capacitors to substitute. 2. As one of safety capacitance X capacitor, also requires must obtain certification of safety inspection agencies. X capacitor are generally marked security authentication marks and compression AC250V or AC275V, but its real dc withstand voltage of 2000 v, don't use when using nominal pressure AC250V or DC400V capacitors to substitute.
This is an global standard which acts as a form of promise that SMILer Electornic Industrial Co., Ltd. manufatures according to the finest quality standards.
Looking for someone to handle your ac motor capacitor ac start capacitor needs? Check out SMiLer Motor Capacitor today for more information.
SMILer Electornic Industrial Co., Ltd. integrates research streams on team diversity and knowledge boundaries, and present a framework that considers the kinds of specific knowledge boundaries that must be spanned to achieve high-level, cross-boundary teaming.
Custom message
Chat Online 编辑模式下无法使用
Chat Online inputting...
We will get back to you ASAP