lem reserves the right to carry out modifcations on its transducers, in order to improve them, without prior notice. www.lem.com page 1/3 090519/14 i pn = 50 a features closed loop (compensated) current transducer using the hall effect printed circuit board mounting isolated 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) power supplies for welding applications. application domain industrial. current transducer la 55-p for the electronic measurement of currents: dc, ac, pulsed..., with galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). electrical data i pn primary nominal current rms 50 a i pm primary current, measuring range 0 .. 70 a r m measuring resistance t a = 70c t a = 85c r m min r m max r m min r m max with 12 v @ 50 a max 10 100 60 95 ? @ 70 a max 10 50 60 1) 60 1) ? with 15 v @ 50 a max 50 160 135 155 ? @ 70 a max 50 90 135 2) 135 2) ? i sn secondary nominal current rms 50 ma k n conversion ratio 1 : 1000 v c supply voltage ( 5 %) 12 .. 15 v i c current consumption 10 (@ 15 v) + i s ma x accuracy @ i pn , t a = 25c @ 15 v ( 5 %) 0.65 % accuracy - dynamic performance data @ 12 .. 15 v ( 5 %) 0.90 % l linearity error < 0.15 % typ max i o offset current @ i p = 0, t a = 25c 0.2 ma i om magnetic offset current 3) @ i p = 0 and specifed r m , after an overload of 3 x i pn 0.3 ma i ot temperature variation of i o - 25c .. + 85c 0.1 0.6 ma - 40c .. - 25c 0.2 1.0 ma t ra reaction time to 10 % of i pn step < 500 ns t r response time to 90 % of i pn step < 1 s di/dt di/dt accurately followed > 200 a/s bw frequency bandwidth (- 1 db) dc .. 200 khz t a ambient operating temperature - 40 .. + 85 c general data t s ambient storage temperature - 40 .. + 90 c r s secondary coil resistance @ t a = 70c 80 ? @ t a = 85c 85 ? m mass 18 g standards en 50178: 1997 notes : 1) measuring range limited to 60 a max 2) measuring range limited to 55 a max 3) result of the coercive feld of the magnetic circuit. 16019
lem reserves the right to carry out modifcations on its transducers, in order to improve them, without prior notice. www.lem.com page 2/3 090519/14 current transducer la 55-p isolation characteristics v d rms voltage for ac isolation test, 50 hz, 1 min 2.5 kv v w impulse withstand voltage 1.2/50 s 5.7 kv min dcp creepage distance 5 mm dci clearance distance 5 mm cti comparative tracking index (group iiia) 175 applications examples according to en 50178 and iec 61010-1 standards and following conditions: over voltage category ov 3 pollution degree pd2 non-uniform feld safety this transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturers operating instructions. caution, risk of electrical shock when operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply). ignoring this warning can lead to injury and/or cause serious damage. this transducer is a build-in device, whose conducting parts must be inaccessible after installation. a protective housing or additional shield could be used. main supply must be able to be disconnected. en 50178 iec 61010-1 dcp , dci , rated isolation voltage nominal voltage single isolation 500 v 500 v reinforced isolation 250 v 250 v v w
lem reserves the right to carry out modifcations on its transducers, in order to improve them, without prior notice. www.lem.com page 3/3 090519/14 connection dimensions la 55-p (in mm. 1 mm = 0.0394 inch) top view front view left view mechanical characteristics general tolerance 0.2 mm primary through-hole 12.7 x 7 mm fastening & connection of secondary 3 pins 0.63 x 0.56 mm recommended pcb hole 0.9 mm remarks i s is positive when i p fows in the direction of the arrow. temperature of the primary conductor should not exceed 90c. dynamic performances (di/dt and response time) are best with a single bar completely flling the primary 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.
|
