LEM LC100SSP7 Hall Effect Current Sensor Module

The LC100S/SP7 is a Swiss LEM closed-loop Hall effect current sensor module, integrated with a PCB substrate, specifically designed for current monitoring in frequency converters, medium-voltage drives, and DCS control cabinets. Utilizing the magnetic balance Hall effect principle, it provides high-precision AC/DC 100A measurement, isolates strong and weak currents, and outputs a standard analog voltage signal. It is commonly used with ABB, Yokogawa, and Foxboro industrial control drive boards.

The module features a built-in bandwidth temperature compensation circuit, a primary-side perforated busbar structure, 2.5kV insulation withstand voltage, and millisecond-level response speed. It is compatible with ACS5000/6000 medium-voltage frequency converter power units, generator excitation cabinets, and rectifier bridge current sampling. It is a core current detection spare part for power and chemical transmission systems and can directly ｒｅｐｌａｃｅ aging sampling boards.

Main Specifications

• Brand: LEM (Switzerland); Model: LC100SSP7 / LC100S/SP7
• Measurement Range: ±100A AC/DC continuous current, peak surge up to 300A
• Power Supply: DC ±12V / ±15V dual power supply, low power consumption ≤120mA
• Output Signal: Secondary analog voltage output, proportional to primary measured current
• Accuracy & Linearity: ±0.2% FS full scale precision, linearity error ≤0.1%
• Isolation Voltage: 2500 Vrms between primary bus and secondary measuring circuit
• Frequency Bandwidth: DC ~ 10kHz; Response time < 1μs fast dynamic sampling
• Environment: Operating temp -40℃ ~ +85℃; humidity 5~95% non-condensing
• Structure: Through-hole busbar design, PCB integrated mounting board, compact pluggable layout

Core Functions

• Magnetic balance closed-loop Hall principle isolates high-power primary current and low-voltage control circuit, eliminate high voltage interference risk
• Real-time sampling inverter output current, DC bus rectifier current, generator excitation current for drive control board closed-loop torque regulation
• Transmit proportional analog measuring signal to ABB PPC380AE01 / UFC718AE01 main control board for over-current, overload fault protection judgment
• Wide temperature built-in compensation circuit suppress measurement drift under cabinet temperature fluctuation, ensure long-term stable sampling precision
• Ultra-fast response captures instantaneous short-circuit surge current, trigger drive hardware interlock trip to protect IGCT, power diode power semiconductors
• Integrated PCB assembly realizes one-piece replacement, no separate wiring of sensor and carrier board, greatly shorten field maintenance downtime

Application Scenarios

• Thermal power plant ACS6000 medium voltage inverter power unit current sampling board replacement maintenance
• Coal mine hoist, metallurgical rolling mill high-power drive system real-time current monitoring spare parts
• Petrochemical compressor, circulating pump medium voltage converter rectifier bridge current detection assembly
• Hydroelectric generator excitation cabinet, wind power booster station power quality monitoring sampling module
• Yokogawa Centum VP, Foxboro DCS drive control cabinet current measurement integrated board stock
• Energy, mining, chemical heavy industry automation system LEM current sensor long-term backup inventory