LA25-NP

Current Transducer LA 25-NP For the electronic measurement of currents : DC, AC, pulsed, mixed, with a galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). IPN = 5-6-8-12-25 A 16080 Electrical data IPN IP RM Primary nominal r.m.s. current Primary current, measuring range Measuring resistance @ with ± 15 V ISN KN VC IC Vd Vb @ ± 25 At max @ ± 36 At max 25 At 0 .. ± 36 At TA = 70°C TA = 85°C RM min RM max RM min RM max 100 320 100 190 100 315 100 185 Ω Ω Features • Closed loop (compensated) multirange current transducer using the Hall effect • Insulated plastic case recognized according to UL 94-V0. Secondary nominal r.m.s. current Conversion ratio Supply voltage (± 5 %) Current consumption R.m.s. voltage for AC isolation test, 50 Hz, 1 mn R.m.s. rated voltage 1), safe separation basic isolation 25 mA 1-2-3-4-5 : 1000 ± 15 V 10 + IS mA 2.5 kV 600 V 1700 V Advantages • • • • • • • 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. Accuracy - Dynamic performance data X ε L Typical accuracy @ IPN , TA = 25°C Linearity error Offset current 2) @ IP = 0, TA = 25°C Residual current 3) @ IP = 0, after an overload of 3 x IPN Thermal drift of IO 0°C .. + 25°C + 25°C .. + 70°C - 25°C .. + 85°C - 40°C .. + 85°C Response time 4) @ 90 % of IPN di/dt accurately followed Frequency bandwidth (- 1 dB) ± 0.5 < 0.2 Typ ± 0.05 ± 0.05 ± 0.06 ± 0.10 Max ± 0.15 ± 0.15 ± 0.25 ± 0.35 ± 0.5 ± 1.2 % % mA mA mA mA mA mA µs A/µs kHz IO IOM IOT Applications • AC variable speed drives and servo motor drives tr di/dt f 50 DC .. 150 • Static converters for DC motor drives • Battery supplied applications • Uninterruptible Power Supplies (UPS) • Switched Mode Power Supplies (SMPS) General data TA TS RP RS R IS m Notes : Ambient operating temperature Ambient storage temperature Primary resistance per turn @ TA = 25°C Secondary coil resistance @ TA = 70°C @ TA = 85°C Isolation resistance @ 500 V, TA = 25°C Mass Standards 1) 2) 3) 4) - 40 .. + 85 °C - 45 .. + 90 °C < 1.25 mΩ 110 Ω 115 Ω > 1500 MΩ 22 g EN 50178 : 1997 • Power supplies for welding applications. Pollution class 2 Measurement carried out after 15 mn functioning The result of the coercive field of the magnetic circuit With a di/dt of 100 A/µs. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. 060327/13 Page 1/2 LEM w w w .lem.com Dimensions LA 25-NP (in mm. 1 mm = 0.0394 inch) Model + SP N° Date code Bottom view Right view Top view Connection IN OUT Back view Number of primary turns Primary current nominal maximum Nominal output current Turns ratio Primary resistance Primary insertion inductance Recommended connections IPN [ A ] 25 IP [A] ISN [ mA ] KN 1/1000 RP [ mΩ ] 0.3 LP 0.023 [ µH ] 54321 IN 1 36 25 OUT 6 7 8 9 10 54321 IN 2 12 18 24 2/1000 1.1 0.09 OUT 6 7 8 9 10 54321 IN 3 8 12 24 3/1000 2.5 0.21 OUT 6 7 8 9 10 54321 IN 4 6 9 24 4/1000 4.4 0.37 OUT 6 7 8 9 10 54321 IN 5 5 7 25 5/1000 6.3 0.58 OUT 6 7 8 9 10 Mechanical characteristics • • • • General tolerance Fastening & connection of primary Fastening & connection of secondary Recommended PCB hole ± 0.2 mm 10 pins 0.7 x 0.6 mm 3 pins ∅ 1 mm 1.2 mm Remarks • IS is positive when IP flows from terminals 1, 2, 3, 4, 5 to terminals 10, 9, 8, 7, 6 • This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. 060327/13 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. Page 2/2 LEM w w w .lem.com