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
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