Current Transducer LA 25-NP IPN = 5-6-8-12-25 A 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). 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 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 100 315 100 185 Ω Ω 25 mA 1-2-3-4-5 : 1000 ± 15 V 10 + IS mA 2.5 kV 600 V 1700 V Accuracy - Dynamic performance data X ε Typical accuracy @ IPN , TA = 25°C Linearity error L 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 IO IOM IOT tr di/dt f 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 <1 > 50 DC .. 150 mA mA mA mA mA mA µs A/µs kHz 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) • Closed loop (compensated) multirange current transducer using the Hall effect • Insulated plastic case recognized according to UL 94-V0. 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. 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) General data TA TS RP RS Features - 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. LEM 060327/13 Page 1/2 w w w .lem.com Dimensions LA 25-NP (in mm. 1 mm = 0.0394 inch) Model + SP N° Date code Bottom view Top view Right view Connection IN OUT Back view Number Primary current N o m i n a l Turns Primary Primary insertion Recommended of primary nominal maximum output current r a t i o resistance i n d u c t a n c e connections t u r n s IPN [ A ] IP ISN KN RP LP [A] [ mA ] [ mΩ ] [ µH ] 5 4 3 2 1 1 25 36 25 1/1000 0.3 0.023 OUT 6 7 8 9 10 5 4 3 2 1 2 12 18 24 2/1000 1.1 6 7 8 9 10 5 4 3 2 1 8 12 24 3/1000 2.5 6 7 8 9 10 5 4 3 2 1 6 9 24 4/1000 4.4 6 7 8 9 10 5 4 3 2 1 5 7 25 5/1000 6.3 • • • • General tolerance Fastening & connection of primary Fastening & connection of secondary Recommended PCB hole IN 0.58 OUT Mechanical characteristics IN 0.37 OUT 5 IN 0.21 OUT 4 IN 0.09 OUT 3 IN 6 7 8 9 10 Remarks ± 0.2 mm 10 pins 0.7 x 0.6 mm 3 pins ∅ 1 mm 1.2 mm • 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. LEM Page 2/2 w w w .lem.com