LEM LF1005-SSP16

Description

Technical Specifications

• Nominal Primary Current: 1000 A RMS
• Measuring Range: 0 to ±2100 A
• Secondary Nominal Current: 200 mA
• Conversion Ratio: 1:5000
• Supply Voltage Range: ±15 V to ±24 V DC (±10%)
• Accuracy Class: ±0.4% at 25°C
• Linearity Error: <0.1%
• Response Time: <1 µs to 90% of final value
• Frequency Bandwidth: DC to 150 kHz
• Primary Aperture: 40.5 × 13 mm rectangular
• Secondary Connector: JST B 3P-VH connector
• Operating Temperature Range: -40°C to +85°C
• Weight: 600 g

Functional Features

• Closed-loop null-balance Hall effect principle delivers high accuracy and fast response
• Full galvanic isolation between primary and secondary circuits
• Excellent linearity and low temperature drift across operating range
• Wide frequency bandwidth supports DC to high-frequency AC current measurement
• High immunity to external magnetic field interference
• Robust overload capability for transient fault conditions

Application Scenarios

• Industrial variable speed drives and motor control systems
• Railway traction and auxiliary power monitoring
• Power supply and power converter current monitoring
• Battery management and DC power system measurement
• Renewable energy generation and grid integration systems

Material & Construction

• Flame-retardant plastic housing compliant with UL 94-V0
• Laminated magnetic core with precision air gap for Hall element placement
• Potted internal electronics for vibration and moisture resistance
• Integrated electrostatic shield between primary and secondary circuits

Operating Principle

• Primary current flowing through the transducer aperture generates a magnetic field concentrated by the magnetic core.
• A Hall effect sensor positioned in the core air gap detects the magnetic field and produces a proportional voltage signal.
• A secondary compensation coil generates an opposing magnetic field that cancels the primary field, maintaining zero flux in the core (closed-loop null balance).
• The resulting secondary current is directly proportional to the primary current, scaled by the winding turns ratio.

Installation Requirements

• Panel mount installation with appropriate mounting hardware
• Pass primary conductor through the transducer aperture centered in the opening
• Connect secondary output to measurement circuitry via the JST connector
• Connect DC power supply with correct polarity and adequate filtering
• Maintain adequate clearance for high-voltage primary circuit safety

Certifications EN 50155 railway compliant, UL recognized, CE marked