Current transducer for electronic measurement of DC, AC, and pulsed currents, featuring galvanic separation between primary and secondary circuits. Utilizes closed loop (compensated) Hall effect technology in an insulating plastic case recognized according to UL 94-V0, offering excellent accuracy, very good linearity, optimized response time, wide frequency bandwidth, no insertion losses, high immunity to external interference, and current overload capability. Suitable for industrial applications.
Voltage±12 to 15V
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Technical Specifications
LEM LA-55-P technical specifications.
General
| Primary Nominal RMS Current | 50A |
| Primary Current Measuring Range | 0 to ±70A |
| Measuring Resistance at ±12 V, ±50 A (min/max) | 10 to 100Ω |
| Measuring Resistance at ±12 V, ±70 A (min/max) | 10 to 50Ω |
| Measuring Resistance at ±15 V, ±50 A (min/max) | 50 to 160Ω |
| Measuring Resistance at ±15 V, ±70 A (min/max) | 50 to 90Ω |
| Secondary Nominal RMS Current | 50mA |
| Turns Ratio (Np/Ns) | 1:1000 |
| Supply Voltage | ±12 to 15V |
| Current Consumption at ±15 V (min) | 8 + IsmA |
| Current Consumption at ±15 V (typ) | 10 + IsmA |
| Current Consumption at ±15 V (max) | 12 + IsmA |
| Error at IPN, TA=25°C at ±15V | ±0.65% |
| Error at IPN, TA=25°C at ±12-15V | ±0.90% |
| Linearity Error | < 0.15% |
| Electrical Offset Current at Ip=0, TA=25°C | ±0.2mA |
| Magnetic Offset Current (after overload) | ±0.3mA |
| Temperature Variation of Io (-25°C to +85°C) | ±0.1 to ±0.6mA |
| Temperature Variation of Io (-40°C to -25°C) | ±0.2 to ±1.0mA |
| Delay Time (10% of final output for IPN step) | < 500ns |
| Delay Time (90% of final output for IPN step) | < 1µs |
| Frequency Bandwidth (-1 dB) | DC to 200kHz |
| Ambient Operating Temperature | -40 to +85°C |
| Ambient Storage Temperature | -40 to +90°C |
| Resistance of Secondary Winding at TA=70°C | 80Ω |
| Resistance of Secondary Winding at TA=85°C | 85Ω |
| Mass | 18g |
| RMS Voltage for AC Insulation Test (50Hz/1min) | 2.5kV |
| Impulse Withstand Voltage (1.2/50µs) | 5.7kV |
| Creepage Distance | 5mm |
| Clearance | 5mm |
| Comparative Tracking Index (Group I) | 600 |
Compliance
| En 50178: 1997 | Standard |
| Ul 508: 2010 | Standard |
| Iec 61010-1 | Standard |
| RoHS | Compliant |
| Certification | UL 94-V0 (Insulating Plastic Case) |
| Insulation (basic) - En 50178 Rated Voltage | 300 V |
| Insulation (basic) - Iec 61010-1 Nominal Voltage | 300 V |
| Insulation (reinforced) - En 50178 Rated Voltage | 150 V |
| Insulation (reinforced) - Iec 61010-1 Nominal Voltage | 150 V |
Datasheet
LEM LA-55-P Datasheet
Download the complete datasheet for LEM LA-55-P to view detailed technical specifications.
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