QT40.481 48V, 20A, THREE PHASE INPUT POWER SUPPLY 3AC 380-480V Wide-range Input Three Input Fuses Included Width only 110mm, Weight only 1.5kg 95.4% Full Load and Excellent Partial Load Efficiencies 50% BonusPower®, 1440W for up to 4s 55A Peak Current for 25ms for Easy Fuse Tripping Active PFC (Power Factor Correction) Active Filtering of Input Transients Negligible Low Input Inrush Current Surge Full Power Between -25°C and +60°C Current Sharing Feature for Parallel Use Internal Data Logging for Troubleshooting Included. Remote Control of Output Voltage DC-OK Relay Contact Shut-down Input 3 Year Warranty GENERAL DESCRIPTION SHORT-FORM DATA The most outstanding features of the DIMENSION QSeries DIN-rail power supplies are the extremely high efficiencies and the small sizes, which are achieved by a synchronous rectification and other technological designs. Output voltage Adjustment range Output current A large international approval package for a variety of applications makes this unit suitable for nearly every application. DC 48V 48 - 54V 20 – 17.8A 30 – 26.7A Output power 960W 1440W Output ripple < 150mVpp Input voltage 3AC 380-480V Mains frequency 50-60Hz AC Input current 1.65 / 1.35A Power factor 0.88 / 0.90 AC Inrush current typ. 4.5A peak Efficiency 95.4 / 95.2% Losses 46.3 / 48.4W Temperature range -25°C to +70°C Derating 24W/°C Hold-up time typ. 25 / 25ms Dimensions 110x124x127mm Weight 1500g / 3.3lb ORDER NUMBERS Large power reserves of 150% support the starting of heavy loads such as DC-motors or capacitive loads. In many cases this allows the use of a unit from a lower wattage class which saves space and money. High immunity to transients and power surges as well as low electromagnetic emission makes usage in nearly every environment possible. The integrated output power manager, the three input fuses and near zero input inrush current make installation and usage simple. Diagnostics are easy due to the DC-ok relay, a green DC-OK LED and the red overload LED. Power Supply Wall mount bracket Buffer unit Redundancy module Nov. 2013 / Rev. 2.1 DS-QT40.481-EN All parameters are specified at 48V, 20A, 3x400Vac, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0

QT40.481 48V, 20A, THREE PHASE INPUT The information presented in this document is believed to be accurate and reliable and may change without notice. No part of this document may be reproduced or utilized in any form without permission in writing from the publisher. PE is the abbreviation for Protective Earth and has the same meaning as the symbol Earth, Ground This document uses the term “earth” which is the same as the U.S. term “ground”. To be defined, value or description will follow later. A figure displayed with the AC or DC before the value represents a nominal voltage with standard tolerances...

QT40.481 48V, 20A, THREE PHASE INPUT 1. INTENDED USE This device is designed for installation in an enclosure and is intended for the general professional use such as in industrial control, office, communication, and instrumentation equipment. Do not use this power supply in equipment, where malfunction may cause severe personal injury or threaten human life. This device is designed for use in hazardous, non-hazardous, ordinary or unclassified locations. 2. INSTALLATION REQUIREMENTS This device may only be installed and put into operation by qualified personnel. This device does not contain serviceable...

□innefUSIOfU Q-Series 48V, 20A, THREE PHASE INPUT suitable for TN, TT and IT mains networks, grounding of one phase is allowed except in UL 508 continuous operation Allowed voltage L to earth Input frequency Turn-on voltage Shut-down voltage typ. 3x 305Vac steady-state value, load independent, see Fig. 3-1 typ. 3x 275Vac steady-state value, load independent, see Fig. 3-1 Input current typ. 1.65A 1.35A at 48V, 20A, symmetrical phase voltages, Power factor*' Start-up delay Rise time Turn-on overshoot *) The power factor is the ratio of the true (or real) power to the apparent power in an AC circuit....

QT40.481 48V, 20A, THREE PHASE INPUT 4. INPUT INRUSH CURRENT The power supply is equipped with an active inrush current limitation circuit, which limits the input inrush current after turn-on to a negligible low value. The input current is usually smaller than the steady state input current. Inrush current*) Inrush energy Inrush delay *) over entire temperature range over entire temperature range over entire temperature range The charging current into EMI suppression capacitors is disregarded in the first microseconds after switch-on. Fig. 4-1 Typical turn-on behaviour at nominal load and 25°C...

QT40.481 48V, 20A, THREE PHASE INPUT 6. OUTPUT Output voltage Adjustment range Ripple and noise voltage Output current Output power BonusPower® time BonusPower® recovery time Overload behavior Short-circuit current**) Output capacitance *) Line regulation Load regulation Factory setting guaranteed at clockwise end position of potentiometer ±0.2%, at full load, cold unit, in “single use” mode ±0.2%, at full load, cold unit, in “parallel use” mode at no load, cold unit, in “parallel use” mode 3x323-576Vac in “single use” mode: static value, 0A 20A, see Fig. 6-1 in “parallel use” mode: static value,...

QT40.481 48V, 20A, THREE PHASE INPUT Fig. 6-2 Output voltage vs. output current in “parallel use” mode, typ. Fig. 6-1 Output voltage vs. output current in “single use” mode, typ. Output Voltage Output Voltage (Parallel Use, typ.) Adjustment Range Adjustment Range Continuously available Short-term (4s) BonusPower Factory setting Continuously available Short-term (4s) B BonusPower Output Current Output Current Fig. 6-3 Bonus time vs. output power Fig. 6-4 Dynamic overcurrent capability, typ. Output Voltage (dynamic behavior, < 25ms) Bonus Time Adjustment Range Output Power Output Current Fig. 6-5...