LEM LZSR Current Transducer Sensors
LEM LZSR Current Transducer Sensors are designed for precise measurement of DC, AC, and pulse currents, ranging from 80ARMS to 200ARMS, while ensuring galvanic isolation between primary and secondary circuits. These sensors offer outstanding performance with ultra-low offset drift as low as 3ppm/K, a significant improvement over previous generations that relied on traditional Hall-effect chips. Additional features include reference access, an overcurrent detection output, and operation on a +5V power supply, making the components highly efficient for various industrial applications.
Available in two configurations, the LZSR-P version features an aperture for primary conductor insertion, while the LZSR-TP version integrates primary conductors for direct PCB soldering. Utilizing Hall-effect ASIC closed-loop sensor technology, LEM LZSR sensors provide high peak current measurement capabilities of up to three times the nominal value, ensuring accuracy and reliability. Specifically adapted for 70kW to 120kW solar inverters, these sensors are an ideal choice for renewable energy systems, offering stable and precise current monitoring.
Features
- Closed-loop multi-range current transducer
- Voltage output
- Unipolar supply voltage
- Internal reference voltage provided on an additional pin
- Overcurrent detection output (threshold set at 1.93 × IPN) available as a standard option on an additional pin
- PCB mounting for LZSR-TP versions
- Measuring range up to 3x primary nominal
- Very low offset drift
- Very good dv/dt immunity
- Unique compact size for all ranges (37.75mm × 48.2mm × 19.4mm)
Applications
- AC variable speed and servo motor drives
- Battery-supplied applications
- Uninterruptible Power Supplies (UPS)
- Switched Mode Power Supplies (SMPS)
- Power supplies for welding applications
- Solar inverters
Specifications
- 7V maximum supply voltage (UCmax)
- 10A x IPN maximum primary current (IPmax)
- 110°C maximum primary conductor temperature (TBmax)
- 4kV electrostatic discharge voltage (HBM) (UESD HBM)
- 1000V AC/DC primary involved potential
- +85°C maximum surrounding air temperature (TA)
- 5VDC transducer supply voltage (UC)
- 0 to 5V output voltage (Uout)