英国牛顿n4l 变压器绕组变形频响分析仪 sfra45 电力参数测量分析仪 长沙泰克示波器 长沙泰克电源 长沙力科示波器 长沙力科电源 长沙安捷伦示波器 长沙力科电源 长沙安捷伦示波器 长沙安捷伦电源 长沙福禄克万用表 湖南福禄克万用表 高压探头 电流探头 湖南泰克示波器 湖南泰克电源 湖南力科示波器 湖南力科电源 湖南安捷伦示波器 湖南力科电源 湖南安捷伦示波器 湖南安捷伦电源 高压探头 电流探头 一、产品简介 the sfra45 is a sweep frequency response analyzer with a bandwidth of 5hz to 45mhz, the sfra45 offers a fully portable solution for the field of sfra (sweep frequency response analysis) which fully complies with iec60076-18 – power transformers part 18 measurement of frequency response 二、产品特点及详细参数 the sfra45 is a sweep frequency response analyzer with a bandwidth of 5hz to 45mhz, the sfra45 offers a fully portable solution for the field of sfra (sweep frequency response analysis) which fully complies with iec60076-18 – power transformers part 18 measurement of frequency response. featuring an inbuilt colour lcd screen as well as being battery powered, the tablet style instrument can be used with or without pc software. the dedicated software available (sfracomm) enables the user to create databases in which historical transformer sweeps can be recalled and compared to current sweeps for analysis. this offers the ability to perform the most common sweep frequency response analysis technique “fingerprint comparison” as well as all other comparison techniques. product images the complete package – the sfra45 package includes all accessories for connection to the transformer the sfra45 tablet style sweep frequency response analyzer quarter view of the newtons4th sfra45 sweep frequency response analyzer newtons4th sfra45 sweep frequency response analyzer demystifying sfra the sweep frequency response analyzer simply injects a range of frequencies into a winding of a power transformer, when the power transformer is built correctly with no imperfections and faults the frequency response (of gain vs frequency) plot of that particular type of transformer and winding on that particular transformer should exhibit a particular shape, this “shape” then becomes the transformers “fingerprint”. over the course of the transformers lifetime this “fingerprint” can be used in order to detect degradation of the transformer. when is sfra performed? there are three main occasions when sfra is performed 1. upon factory quality checking 2. before a short circuit test 3. before and after transportation 4. ongoing scheduled maintenance features and benefits 0.02db basic accuracy frequency range 5hz to 45mhz full colour vga display rs232, lan and usb pc software package included 2hr battery life leading phase accuracy truly portable measurements lcr mode save data to external usb 50ohm or high impedance input scope function save data to database for comparison features and benefits 0.02db basic accuracy frequency range 5hz to 45mhz full colour vga display rs232, lan and usb pc software package included 2hr battery life leading phase accuracy truly portable measurements lcr mode save data to external usb 50ohm or high impedance input scope function save data to database for comparison supplied with all accessories and carry case