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FC-SCT1090-300T-50A是方成(FC)针对中大功率电流测量场景推出的高精度电流互感器,核心作用是将原边(初级)的大电流按1:300比例转换为副边(次级)的小电流信号——既实现高低压电路的电气隔离,又能适配常规信号采集电路(如ADC、运放)的输入范围,广泛用于工业电力、新能源、电力测试等领域的电流监测与控制环节。
匝数比1:300,额定输入电流50A,对应次级输出电流≈166.7mA,输出信号幅度适中:无需额外复杂放大/衰减,可直接匹配多数单片机ADC或数据采集卡的输入量程(如0~2V,搭配10Ω负载时输出电压≈1.67V)。
隔离电压2.5kV(有效值),满足工业环境中高低压电路的绝缘要求,有效防止原边高压串入副边测量电路,避免设备损坏或人员触电风险。
次级侧电感值45mH:可有效抑制高频干扰,提升信号的抗噪能力,减少测量误差(典型相位误差≤1%@50/60Hz)。
采用DIP(双列直插)封装,便于手工焊接或自动插件生产,兼容常规PCB设计,降低系统集成难度。
内部采用高精度线圈绕制技术,确保匝数比的一致性(批量产品离散性≤0.5%),避免不同批次产品的测量偏差。
工作温度范围覆盖-40℃~85℃,可适应户外光伏电站、工厂车间等恶劣环境的温度波动,长期运行无性能衰减。
具备瞬时过载能力:1.2倍额定电流(60A)可连续工作,2倍额定电流(100A)可短时(<10秒)工作,应对突发电流波动时仍能保持信号稳定。
次级电感的合理设计结合隔离特性,可屏蔽电磁干扰(如电机、变频器的杂波),提升测量准确性。
工厂配电柜、电机控制中心(MCC)的三相电流实时监测:帮助运维人员掌握负载分布,识别过载、缺相等隐患,优化能源消耗。
便携式功率分析仪、电能质量监测仪的电流输入模块:为电压、功率、谐波等参数测试提供准确的电流基准。
变频器、软启动器的电流反馈回路:实现过流、堵转保护,避免电机烧毁,提升设备可靠性。
实际输入电流需≤50A(若需测量更大电流,需选择FC-SCT系列更高量程型号),避免磁芯饱和导致信号失真。
次级应连接功率匹配的负载电阻(如10Ω/2W、20Ω/1W),负载功率计算公式:(P=I_{次级}^2×R)(如166.7mA×166.7mA×10Ω≈0.278W,需选1/2W以上电阻)。
安装时需保持原边与副边电路的绝缘距离(≥5mm),避免短路;原边导线需穿过互感器中心孔,确保电流均匀分布。
DIP封装焊接时,烙铁温度控制在300℃以下,焊接时间≤3秒,防止高温损坏内部线圈。
户外应用需配合IP65以上防护外壳,避免雨水、灰尘侵入影响性能。
FC-SCT1090-300T-50A凭借高隔离、低损耗、稳定可靠的特点,成为工业与新能源领域电流测量的实用选择,适配多种常规电路设计,有效降低系统集成成本与运维难度。
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