LDT481 Series is a high power switching mode power supplies with three phase input voltage 400 500 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 compactness and high power are needed. LDT481 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 400 500 VAC Overload 150% High Efficiency and compact size Constant current or hiccup mode limitation, user settable User 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 END OF LIFE2 LDT481 Series LDT481-12 400 - 500 VAC / 520 - 725 VDC 3 12 VDC 40 A LDT481-24 400 - 500 VAC / 520 - 725 VDC 3 24 VDC 20 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. Rated, three phase (UL certified) 400 500 VAC 1 Input AC Voltage Range Operating 340 550 VAC Input DC Voltage Range 520 725 VDC Input Frequency 47 - 63 Hz Vin = 400 VAC 1.3 A Input AC Current Vin = 500 VAC 1.1 A Vin = 520 VAC 1.2 A Input DC Current Vin = 725 VAC 0.9 A Inrush Peak Current 50 A Touch (Leakage) Current 0.15 mA Internal Protection Fuse None, external fuse must be provided It is strongly recommended to provide external surge Recommended External Protection Fuse 3x 10 AT or 3x MCB 10 A C curve arresters (SPD) according to local regulations 1 In case of 2-phase operation, reduce the output load to 50% of the nominal value. Output Power 480 W LDT481-12 12 VDC (12 15 VDC) LDT481-24 24 VDC (23 28 VDC) Rated Voltage (Adjustable Voltage Range) LDT481-48 48 VDC (45 55 VDC) LDT481-72 72 VDC (72 85 VDC) LDT481-12 40 A LDT481-24 20 A Continuous Current LDT481-48 10 A LDT481-72 6.7 A LDT481-12 44 A LDT481-24 22 A Overload Limit (Constant Current Mode) LDT481-48 11 A LDT481-72 7.5 A LDT481-12 60 A LDT481-24 30 A Overload Limit (Hiccup Mode) (max. 5s) LDT481-48 15 A LDT481-72 10 A LDT481-12 2.5% Load Regulation LDT481-24 1.0% LDT481-48 / LDT481-72 0 .5% LDT481-12 150 mVpp 2 Ripple & Noise LDT481-24 / LDT481-48 / LDT481-72 1 0 0 mVpp Hold up Time 20 ms tech.support psbel.com END OF LIFE