LA125-P

Current Transducer LA 125-P For the electronic measurement of currents : DC, AC, pulsed..., with a galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). IPN = 125 A Electrical data IPN IP RM Primary nominal r.m.s. current Primary current, measuring range Measuring resistance @ with ± 12 V with ± 15 V ISN KN VC IC Vd @ ± 125 A max @ ± 200 A max @ ± 125 A max @ ± 200 A max 125 0 .. ± 200 TA = 70°C TA = 85°C RM min RM max RM min RM max 5 5 25 25 52 20 74 34 14 14 40 40 1) 50 18 72 4 0 1) A A Features •Closed loop (compensated) current transducer using the Hall effect Ω Ω Ω Ω •Printed circuit board mounting •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 125 mA 1 : 1000 ± 12 .. 15 V 16 (@ ± 15 V) + IS mA 3 kV Advantages •Excellent accuracy •Very good linearity •Low temperature drift •Optimized response time •Wide frequency bandwidth •No insertion losses •High immunity to external interference Accuracy - Dynamic performance data X Accuracy @ IPN , TA = 25°C L ε @ ± 15 V (± 5 %) @ ± 12 .. 15 V (± 5 %) Linearity ± 0.60 ± 0.80 < 0.15 Max ± 0.40 ± 0.50 ± 0.50 ± 0.60 % % % mA mA mA mA ns µs A/µs kHz •Current overload capability. IO I OM IOT tra tr di/dt f Typ Offset current @ IP = 0, TA = 25°C Residual current 2) @ IP = 0, after an overload of 3 x IPN Thermal drift of IO 0°C .. + 70°C ± 0.15 - 25°C .. + 85°C ± 0.15 Reaction time @ 10 % of IP max Response time 3) 4) @ 90 % of IP max di/dt accurately followed 4) Frequency bandwidth 4) (- 1 dB) Applications •AC variable speed drives and servo motor drives < 500 200 DC .. 100 •Static converters for DC motor drives •Battery supplied applications •Uninterruptible Power Supplies (UPS) •Switched Mode Power Supplies (SMPS) General data TA TS RS m Ambient operating temperature Ambient storage temperature Secondary coil resistance @ Mass Standards 1) 2) 3) 4) TA = 70°C TA = 85°C 5) - 25 .. + 85 - 40 .. + 90 32 33.5 40 EN 50178 °C °C Ω Ω g •Power supplies for welding applications. Notes : 5) Measuring range limited to ± 180 A max The result of the coercive field of the magnetic circuit With a di/dt of 100 A/µs The primary conductor is best filling the through-hole and/or the return of the primary conductor is above the top of the transducer A list of corresponding tests is available 980716/5 LEM Components w w w .lem.com Dimensions LA 125-P Bottom view (in mm. 1 mm = 0.0394 inch) Left view Standard 00 or N° SP.. Year Week Secondary terminals Terminal - : supply voltage - 12 .. 15 V Terminal M : measure Terminal + : supply voltage + 12 .. 15 V Terminal : NC swiss made Connection Front view Mechanical characteristics •General tolerance ± 0.2 mm •Primary through-hole 17 x 11 mm •Fastening & connection of secondary 4 pins 0.63 x 0.56 mm Recommended PCB hole •Supplementary fastening Recommended PCB hole Recommended screws LEM code 0.9 mm 2 holes ∅ 1.75 mm 2.4 mm K A 22 x 6 47.30.60.006.0 Remarks •IS is positive when IP flows in the direction of the arrow. •Temperature of the primary conductor should not exceed 90°C. •Dynamic performances (di/dt and response time) are best with a primary bar in low position in the through-hole. •In order to achieve the best magnetic coupling, the primary windings have to be wound over the top edge of the device. •This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.