For power quality management applications, Ningbo CRRC Times Sensing offers a full range of closed-loop Hall-effect current sensors that deliver high-precision high-current sensing solutions for core power quality equipment such as Static Var Generators (SVG) . Among them, the 2000A and 1000A closed-loop B-series sensors are suited for the main power circuits of power quality devices, providing accurate measurement of inverter output current and grid-connected bus current. The 300A closed-loop B-series sensor is applicable for current sensing in branch compensation units and control circuits. The closed-loop large-aperture series (with 90mm、120mm、160mm through holes) enables direct feed-through installation of large-size busbars, meeting the integrated wiring requirements of high-power cabinets. Featuring fast dynamic response, excellent electromagnetic immunity and low temperature drift, the full sensor portfolio provides reliable real-time current feedback for closed-loop reactive current control, harmonic compensation calculation and full-range overcurrent protection of power quality equipment. It ensures the equipment can quickly track power quality fluctuations in the grid, and achieve precise dynamic reactive power compensation, harmonic mitigation and voltage support. The products are widely used in power quality scenarios including industrial distribution networks, renewable energy grid connection stations and rail transit power supply systems.