Current Sensors solutions for Solar Applications
Current sensing for solar and power conversion
Solar power systems rely on precise power conversion to transform the DC electricity generated by photovoltaic panels into usable AC power for residential, commercial, and grid-connected applications. Within these architectures, accurate current measurement is essential to support efficiency, control, and dependable operation. Solar continues to be a major driver of renewable capacity growth, reinforcing the need for robust conversion and sensing technologies.
At LEM, we support designers with current sensing solutions that help improve the efficiency, reliability, and cost-effectiveness of solar inverters and associated conversion stages. LEM provides solutions throughout the full solar and power conversion application.
CTSRL 4 & CTSRL 6
Features
- 5 V supply voltage: ±5% (CTSRL 4), ±10% (CTSRL 6)
- Operating temperature range −40 °C and 105 °C
- Wide aperture
- High overload capability
- High insulation capability
- Reference pin with two modes, Ref In and Ref Out
- Degauss and test functions
Additional features for CTSRL 6:
- Phase current up to 450Arms
- Aperture dimension of 32 mm in diameter
Benefits
- High phase current
Typical applications
- Residual current measurement
- Leakage current measurement in PV inverters
- Failure detection in power sources
- Leakage current detection in stacked DC source (PFC power module)
Additional applications for CTSRL 6:
- Symmetrical fault detection (e.g. after motor inverters)
- Higher current monitoring applications up to 450 ARMS
HLSR 120-P/SP 59
Features
- Open loop multi-range current transducer
- Voltage output
- Single supply +5 V ± 5%
- Galvanic separation between primary and secondary
- Low power consumption
- Compact design for through-hole PCB mounting
- Factory calibrated
Benefits
- Small footprint
- Low offset drift
- High bandwidth
- Low response time
Typical applications
- AC variable speed and servo motor drives
- Static converters for DC motor drives
- Battery supplied applications
- Uninterruptible Power Supplies (UPS)
- Switched Mode Power Supplies (SMPS)
- Power supplies for welding applications
- Combiner box
- MPPT
LTS 350-PB, LTS 400-PB
Features
- Close loop (compensated)
- Current transducer using the Hall effect
- Insulating plastic case recognized according to UL 94-V0
- +12V single power supply with 1200A measurement range
- PCB mounting
- Aperture 23.5 mm
Benefits
- Excellent accuracy
- Very good linearity
- Low temperature drift
- Optimized response time
- Wide frequency bandwidth
- High immunity to external interference
- Current overload capability
Typical applications
- Motor controller
- Solar inverter
- Uninterruptible Power Supplies (UPS)
- Battery chargers
- Power conversion system (PCS)
LWSR 350-P
Features
- Closed loop multi-range current transducer
- Voltage output
- Unipolar supply voltage
Benefits
- Very low offset drift
- Very good di/dt
Typical applications
- Solar inverters
- AC variable speed and servo motor drives
- Battery supplied applications
- Uninterruptible Power Supplies (UPS)
- Switched Mode Power Supplies (SMPS)
- Power supplies for welding applications
GXM ANC
Features
- Automotive qualified AECQ 100 Grade 0
- Open loop multi-range current sensor: 50~200A
- Low electrical resistance: 0.27 mΩ
- Dual supply voltage: 5V or 3.3 V
- Over current detection
- Fixed output with Verf
- High bandwidth: 320kHz
- 1.5us response time
- Galvanic separation between primary and secondary with 8.2mm of dCI and 8.2mm of dCp
- Insulated test voltage: 5000V RMS (UL62638)
- Working Voltage for Basic Isolation: 1618Vdc/1144 Vrms
- Maximum surge current (Isurge): 20KA
- Wide body SOIC 10L package
- Working Temperature: -40°C ~ 150°C
Typical applications
- Solar System
- Servo and Drive
- Automation
- HVAC
- Automotive On Board Charger
- DCDC
- Power distribution
- Solar Inverter