LA25-NP 

LA25-NP 

制造商：: LEM

LEM LA25-NP 

规格

Product Introduction

This current transducer is designed for the electronic measurement of currents: DC, AC, pulsed, etc., with galvanic separation between the primary circuit and the secondary circuit. It operates as a closed loop (compensated) current transducer using the Hall effect.

Features

  • Closed loop (compensated) current transducer using the Hall effect
  • Insulating plastic case recognized according to UL 94-V0
  • Excellent accuracy
  • Very good linearity
  • Low temperature drift
  • Optimized response time
  • Wide frequency bandwidth
  • No insertion losses
  • High immunity to external interference
  • Current overload capability

Applications

  • AC variable speed drives 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

Specifications Table

Primary nominal RMS current 25 At
Primary current, measuring range 0~±36 At
Measuring resistance @ TA = 70 °C, with ±15 V @ ±25 At 100~320 Ω
Measuring resistance @ TA = 85 °C, with ±15 V @ ±25 At 100~315 Ω
Measuring resistance @ TA = 70 °C, with ±15 V @ ±36 At 100~190 Ω
Measuring resistance @ TA = 85 °C, with ±15 V @ ±36 At 100~185 Ω
Secondary nominal RMS current 25 mA
Turns ratio (NP/NS) 1-2-3-4-5 : 1000
Supply voltage (±5 %) ±15 V
Current consumption 10 + IS mA
Total error @ IPN, TA = 25 °C ±0.5 %
Linearity error < 0.2 %
Electrical offset current @ IP = 0, TA = 25 °C ±0.05~±0.15 mA
Magnetic offset current @ IP = 0 and specified RM, after an overload of 3 × IPN ±0.05~±0.15 mA
Temperature variation of IO, 0 °C … +25 °C ±0.06~±0.25 mA
Temperature variation of IO, +25 °C … +70 °C ±0.10~±0.35 mA
Temperature variation of IO, −25 °C … +85 °C ±0.5 mA
Temperature variation of IO, −40 °C … +85 °C ±1.2 mA
Delay time to 90 % of the final output value for IPN step < 1 µs
Frequency bandwidth (−1 dB) DC~150 kHz
Ambient operating temperature −40~+85 °C
Ambient storage temperature −45~+90 °C
Resistance of primary winding @ TA = 25 °C < 1.25 mΩ
Resistance of secondary winding @ TA = 70 °C 110 Ω
Resistance of secondary winding @ TA = 85 °C 115 Ω
Insulation resistance @ 500 V, TA = 25 °C > 1500 MΩ
Mass 22 g
Standards EN 50178: 1997, UL 508: 2010
RMS voltage for AC insulation test, 50 Hz, 1 min 2.5 kV
Impulse withstand voltage 1.2/50 µs 9 kV
Clearance 10.63 mm
Comparative tracking index (group IIIa) 175
Rated insulation voltage, basic insulation (EN 50178) 1000 V
Rated insulation voltage, reinforced insulation (EN 50178) 500 V
Nominal voltage, basic insulation (IEC 61010-1) 1000 V
Nominal voltage, reinforced insulation (IEC 61010-1) 300 V
General tolerance ±0.2 mm
Fastening and connection of primary 10 pins 0.7 × 0.6 mm
Fastening and connection of secondary 3 pins 1 mm

To learn more, please download the PDF.

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