LZSR

LEM enlarges the measuring range of single supplied +5 V current sensors up to 450Apk

LZSR - Solar current sensors

The LZSR product family is tailored for precise measurements of DC, AC, and pulse currents, spanning from 80 to 200 ARMS, all while maintaining galvanic isolation.

LZSR current sensors boast remarkable features, including low offset drift reaching as low as 3 ppm/K, a significant improvement over previous generations utilizing traditional Hall effect chips, along with reference access, overcurrent detection output, and a +5V power supply.

While LZSR-P versions are equipped with apertures for primary conductor insertion, LZSR-TP versions integrate primary conductors for direct soldering onto printed circuits.

Leveraging Hall effect ASIC closed-loop sensors, the LZSR current sensor family delivers high peak measurements, up to three times the nominal value, ensuring dependable and accurate current assessments in various industrial applications.

LZSR sensors are particularly adapted to 70-120kW solar inverters.

LZSR – Features and benefits

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 standard option on an additional pin
PCB mounting for LZSR-TP versions

Main characteristics

Measuring range up to 3x primary nominal
Very low offset drift
Very good dv/dt immunity
Unique compact size for all ranges (37.75 × 48.2 × 19.4mm)

Typical applications

LZSR sensors are extensively utilized across diverse industrial applications due to their capacity to accurately measure DC, AC, and pulse currents. Some instances of these applications include:

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

LEM LZSR – Download & Technical Characteristic

Product	Document	Primary nominal RMS voltage	Supply Voltage range	Op. Temperature
LZSR 80-P	Datasheet	80 A	5 to 5	-40 to 85°C
LZSR 100-P	Datasheet	100 A	5 to 5	-40 to 85°C
LZSR 100-TP	Datasheet 3D	100 A	5 to 5	-40 to 85°C
LZSR 150-P	Datasheet	150 A	5 to 5	-40 to 85°C
LZSR 150-P/SP1	Datasheet 3D	150 A	5 to 5	-40 to 85°C
LZSR 150-TP	Datasheet	150 A	5 to 5	-40 to 85°C
LZSR 200-P/SP1	Datasheet	200 A	5 to 5	-40 to 85°C
LZSR 200-TP/SP1	Datasheet	200 A	5 to 5	-40 to 85°C

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