l dt 481 series is a high power switching mode power supplies with three phase input voltage 400 C 500 vac, delivering 480 w of output power, covering output voltages from 24 to 72 v (model dependent). their compact size, high efficiency and excellent reliability together with easy installation make them fit demanding applications where compactnes s and high power are needed. ldt 481 series are suitable for selv and pelv circuitry ( up to 48 vdc models ) and are designed to be mounted on din rail and installed inside a protective enclosure. ? 3 phase ac input 4 00 C 50 0 vac ? overload 150% ? high efficiency and c ompact size ? up to 50c operating temperature with no derating ? u ser settable current limitation ( hiccup or constant mode ) ? easy parallelable for power increase ? natural convection cooling ? 72 v output model as standard ? automation ? process control ? communication ? instrumentation equipment
2 ldt 481 series tech.support@psbel.com ldt481 - 12 400 - 500 vac / 520 - 725 vdc 3 12 v dc 40 a ldt481 - 24 400 - 500 vac / 520 - 725 vdc 3 24 vdc 2 0 a ldt481 - 48 400 - 500 vac / 520 - 725 vdc 3 48 vdc 10 a ldt481 - 72 400 - 500 vac / 520 - 725 vdc 3 72 vdc 6.7 a technical parameters are typical, measured in laboratory environment at 25c and 400 vac / 50 hz, at nominal values, after minimum 5 minutes of operation. input ac voltage range 1 rated, three phase (ul certified) operating 4 00 C 500 vac 340 C 550 vac input dc voltage range 52 0 C 725 vdc input frequency 47 - 63 hz input ac current vin = 400 vac 1.3 a vin = 500 vac 1 .1 a input d c current vin = 520 vac 1 .2 a vin = 725 vac 0.9 a inrush peak current 50 a touch (leakage) current 0. 1 5 ma internal protection fuse none, external fuse must be provided recommended external protection it is strongly recommended to provide external surge arresters (spd) according to local regulations fuse 3x 10 at or 3x mcb 10 a c curve 1 in case of 2 phase operation, reduce the output load to 50% of the nominal value. output power 480 w rated voltage (adjustable voltage range ) ldt481 - 12 ldt481 - 24 ldt481 - 48 ldt481 - 72 12 vdc (12 C 15 vdc) 24 vdc (23 C 28 vdc) 48 vdc (45 C 55 vdc) 72 vdc (72 C 85 vdc) continuous current ldt481 - 12 ldt481 - 24 ldt481 - 48 ldt481 - 72 40 a 20 a 10 a 6.7 a overload limit ( constant current mode ) ldt481 - 12 ldt481 - 24 ldt481 - 48 ldt481 - 72 44 a 22 a 1 1 a 7.5 a overload limit ( hiccup mode ) (max. 5s) ldt481 - 12 ldt481 - 24 ldt481 - 48 ldt481 - 72 60 a 30 a 15 a 10 a load regulation ldt481 - 12 ldt481 - 24 ldt481 - 48 / ldt481 - 72 2.5 % 1.0% 0.5% ripple & noise 2 ldt481 - 12 ldt481 - 24 / ldt481 - 48 / ldt481 - 72 150 mvpp 100 mvpp hold up time 20 ms
ldt 481 series 3 asia - pacific +86 755 298 85888 europe, middle east +353 61 225 977 north america +1 408 785 5200 ? 2016 bel power solutions & protection bcd.00 845_ a b protections overload, short circuit: constant current or hiccup mode (user settable) thermal protection output overvoltage output over voltage protection ldt481 - 12 ldt481 - 24 ldt481 - 48 ldt481 - 72 18 vdc 33 vdc 68 vdc 100 vdc status signals dc ok - green led overload - red led dc ok - dry contact (no, 24 vdc / 1 a) parallel connection 3 possible for power or redundancy (with external oring module) efficiency ldt481 - 12 ldt481 - 24 / ldt481 - 48 ldt481 - 72 > 87 .5 % > 93 .5 % > 94 % dissipated power ldt481 - 12 ldt481 - 24 / ldt481 - 48 ldt481 - 72 < 69 w < 34 w < 31 w 2 ripple and noise are measured with 20 mhz bandwidth, probe terminated with a 0.1 f mkp parallel capacitor. 3 pay attention, set the current limitation mode jumper on c.c. mode when connecting more units in parallel. note: power rating, losses, efficiency, ripple, thermal behaviour and start - up may change outside of the nominal rated input range. contact factory for details. operating temperature ul certified up to 50 c (start - up type tested: - 40 c ) 4 - 40 to + 70c storage temperature - 40 to + 8 0c derating - 4.5 w/c over 50 c humidity non - condensing 5 - 95% rh life time expectancy a t 25 c ambient 75% load 63200 h (7.2 years) overvoltage category pollution degree iii (en50178) 2 (iec60664 - 1) protection class class i isolation voltage input to output input to ground output to ground 4.2 kvdc 2.2 kvdc 0.75 kvdc standards & approvals ul508 (certified ) en60950 (reference) en50178 (reference) emc standards emc emission en55011 (cispr11) en55022 (cispr22) class a class a emc immunity en61000 - 4 - 2 en61000 - 4 - 3 en61000 - 4 - 4 en61000 - 4 - 5 en61000 - 4 - 11 level 3 level 3 level 3 level 4 level 2 protection degree en60529 ip20 vibration sinusoidal iec 60068 - 2 - 6 5 - 17.8 hz: 1.6 mm; 17.8 - 500 hz: 2g 2hours / axis (x,y,z) shock iec 60068 - 2 - 27 30 g 6 ms, 20 g 11 ms; 3 bumps / direction, 18 bumps total) 4 possible at n ominal voltage with load derati n g .
4 ldt 481 series tech.support@psbel.com input connection o utput connection 3 phase: l1 = phase 1 l2 = phase 2 l3 = phase 3 = e arth ground + = positive dc - = negative dc dry contact = nc dc: l1 = + positive dc l2 = - negative dc l3 = do not connect = e arth ground signaling: dc ok: dry contact no com 1 ac/dc input 2 dc output (load) 3 diagnostic output (dry contact, nc output ok) 4 green led: output ok 5 red led: overload 6 output voltage adjustment 7 selectable limitation mode weight 1.3 k g dimensions 8 0 x 127 x 137.5 mm mounting rail iec 60715/h15/th35 - 7.5( - 15) connection terminals screw type header (16 C 10 awg) screw type head e r (10 C 6 awg) ) for output on 12 v model 1.5 C 6 mm 2 6 - 1 6 mm 2 case material alumin um figure 1 . mechanical dr awing nuclear and medical applications - products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. technical revisions - the appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. specifications are subject to change without notice.
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