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qt40.361 q-series 36v, 26.7a, t hree p hase i nput p ower s upply ? 3ac 380-480v wide-range input ? three input fuses included ? width only 110mm, weight only 1.5kg ? 95.3% full load and excellent partial load efficiencies ? 50% bonuspower ? , 1440w for up to 4s ? 83a 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 -25c and +60c ? current sharing feature for parallel use ? remote control of output voltage ? dc-ok relay contact ? shut-down input ? 3 year warranty 1/27 g eneral d escription the most outstanding features of the dimension q- series din-rail power supplies are the extremely high efficiencies and the small size s, which are achieved by a synchronous rectification and other technological designs. large power reserves of 150% support the starting of heavy loads such as dc-moto rs 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 a nd 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 gr een dc-ok led and the red overload led. a large international approval package for a variety of applications makes this unit suitable for nearly every application. s hort - form d ata output voltage dc 36v nominal adjustment range 36 - 42v output current 26.7 C 22.9a continuous 40 C 34.4a short term (4s) output power 960w continuous 1440w short term (4s) output ripple < 130mvpp 20hz to 20mhz input voltage 3ac 380-480v -15%/+20% mains frequency 50-60hz 6% ac input current 1.65 / 1.35a at 3x400 / 480vac power factor 0.88 / 0.90 at 3x400 / 480vac ac inrush current typ. 4.5a peak efficiency 95.3 / 95.2% at 3x400 / 480vac losses 47.3 / 48.4w at 3x400 / 480vac temperature range -25c to +70c operational derating 24w/c +60 to +70c hold-up time typ. 25 / 25ms at 3x400 / 480vac dimensions 110x124x127mm wxhxd weight 1500g / 3.3lb o rder n umbers power supply qt40.361 36-42v standard unit accessory zm2.wall wall mount bracket yr40.482 redundancy module m arkings ind. cont. e q. ul 508 ul 60950-1 emc, lvd, rohs dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput i ndex page page 1. intended use .......................................................3 2. installation requirements ...................................3 3. ac-input ...............................................................4 4. input inrush current ...........................................5 5. dc-input ...............................................................5 6. output .................................................................6 7. hold-up time .......................................................8 8. dc-ok relay contact ..........................................9 9. shut-down input .................................................9 10. remote control of output voltage .................10 11. efficiency and power losses ..............................11 12. lifetime expectancy and mtbf .........................12 13. functional diagram ...........................................12 14. terminals and wiring ........................................13 15. front side and user elements ...........................14 16. emc ....................................................................15 17. environment ......................................................16 18. protection features ...........................................17 19. safety features ..................................................17 20. dielectric strength ............................................18 21. approvals .......................................................... 18 22. physical dimensions and weight ..................... 19 23. accessories ........................................................ 20 23.1. zm2.wall - wall mounting bracket .......20 23.2. yr40.482 - redundancy module ..............20 24. application notes ............................................. 21 24.1. repetitive pulse loading ..........................21 24.2. peak current capability ...........................22 24.3. external input protection .........................22 24.4. using only 2 legs of a 3-phase system ....23 24.5. charging of batteries ...............................24 24.6. output circuit breakers ............................24 24.7. parallel use to increase output power ....25 24.8. parallel use for redundancy ....................25 24.9. series operation .......................................26 24.10. inductive and capacitive loads ................26 24.11. back-feeding loads ..................................26 24.12. use in a tightly sealed enclosure ............26 24.13. mounting orientations ............................27 the information presented in this docume nt is believed to be a ccurate and reliable and ma y change without notice. no part of this document may be reproduc ed or utilized in any form without pe rmission in writing from the publisher. t erminology and a breviations pe and symbol pe is the abbreviation for p rotective e arth 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. t.b.d. to be defined, value or de scription will follow later. ac 400v a figure displayed with the ac or dc before the value represents a nominal voltage with standard tolerances (usually 15%) included. e.g.: dc 12v describes a 12v battery disregardi ng whether it is full (13.7v) or flat (10v) 400vac a figure with the unit (vac) at the end is a momentary figure without any additional tolerances included. 50hz vs. 60hz as long as not otherwise stated, ac 230v parameters are valid at 50hz mains frequency. may a key word indicating flexibility of choice with no im plied preference. shall a key word indicating a mandatory requirement. should a key word indicating flexibility of choi ce with a strongly pref erred implementation. dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 2/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 1. i ntended u se this device is designed for installation in an enclosure a nd is intended for the general professional use such as in industrial control, office, communicati on, and instrumentation equipment. do not use this power supply in equipment, where malfuncti on may cause severe personal injury or threaten human life. this device is designed for us e in non-hazardous, ordinary or unclassified locations. 2. i nstallation r equirements this device may only be installed and put into opera tion by qualified personnel. this device does not contain serviceable parts. the tripping of an internal fuse is caused by an internal defect. if damage or malfuncti on should occur during installation or operation, i mmediately turn power off and send unit to the factory for inspection. mount the unit on a din-rail so that the output and input terminals are located on the bo ttom of the unit. for other mounting orientations see de -rating requirements in this document. see chapter 24.13 . this device is designed for convection cooling and does not require an external fan. do not obstruct airflow and do not cover ventilation grid (e.g. cable conduits) by more than 15%! keep the following installation clearance s: 40mm on top, 20mm on the bottom, 5mm on the left and right sides are recommended when the device is loaded permanently with more than 50% of th e rated power. increase this clearance to 15mm in case the adjacent device is a heat source (e.g. another power supply). warning risk of electrical shock, fi re, personal injury or death. - do not use the power supply without proper grounding (protective earth). us e the terminal on the input block for earth connection and not one of the screws on the housing. - turn power off before working on the devi ce. protect against inad vertent re-powering. - make sure that the wiring is correct by following all local and national codes. - do not modify or repair the unit. - do not open the unit as high voltages are present inside. - use caution to prevent any foreign objects from enteri ng the housing. - do not use in wet locations or in areas wh ere moisture or condens ation can be expected. - do not touch during power-on, and immediatel y after power-off. hot surfaces may cause burns. dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 3/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 3. ac-i nput ac input nom. 3ac 380-480v suitable for tn, tt and it mains networks, grounding of one phase is allowed except in ul 508 applications ac input range min. 3x 323- 576vac continuous operation allowed voltage l to earth ma x. 576vac continuous, iec 60664-1 input frequency nom. 50C60hz 6% turn-on voltage typ. 3x 305vac steady- state value, load independent, see fig. 3-1 shut-down voltage typ. 3x 275vac stead y-state value, load independent, see fig. 3-1 3ac 400v 3ac 480v input current typ. 1.65a 1.35a at 36v, 26.7a, symmetrical phase voltages, see fig. 3-3 power factor *) typ. 0.88 0.90 at 36v, 26.7a, see fig. 3-4 start-up delay typ. 500ms 600ms see fig. 3-2 rise time typ. 40ms 40ms at 36v , 26.7a, resistive load, 0mf see fig. 3-2 typ. 45ms 45ms at 36v, 26.7a, resistive load, 27mf see fig. 3-2 turn-on overshoot max. 750mv 750mv see fig. 3-2 *) the power factor is the ratio of the true (or real) power to the apparent power in an ac circuit. fig. 3-1 input voltage range fig. 3-2 turn-on behavior, definitions turn-on 4/27 323v rated input range v in p out 275v 576vac shut-down 305v start-up delay rise time overshoot - 5% output voltage input voltage l1 l2 l3 fig. 3-3 input current vs. output load at 36v fig. 3-4 power factor vs. output load at 36v power factor, typ. 27a 3 6 9 12 15 18 21 24 0 0 0.3 0.6 0.9 1.2 1.5 1.8a input current, typ. a: 3x 400vac b: 3x 480vac a b 0 3 6 9 12 15 18 21 24 27a 0.70 0.75 0.80 0.85 0.90 0.95 output current output current a: 3x 400vac b: 3x 480vac a b dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 4. i nput i nrush c urrent the power supply is equipped with an active inrush current limitation circuit, which li mits the input inrush current after turn-on to a negligible low valu e. the input current is usually smalle r than the steady sta te input current. 3ac 400v 3ac 480v inrush current *) max. 6a peak 6a peak over entire temperature range typ. 4.5a peak 4.5a peak over entire temperature range inrush energy max. 1.5a 2 s 1.5a 2 s over entire temperature range inrush delay typ. 500ms 600ms *) 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 25c ambient temperature input input current 2a/div 3x400vac 36vdc 5/27 output 100ms/div 5. dc-i nput do not operate this power supply with dc-input voltage. dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 6. o utput output voltage nom. 36v adjustment range min. 36-42v guaranteed max. 45v ***) at clockwise end position of potentiometer factory setting typ. 36.0v 0.2%, at fu ll load, cold unit, in single use mode typ. 36.0v 0.2%, at full load, cold unit, in parallel use mode typ. 37.5v at no load, cold unit, in parallel use mode line regulation max. 10mv 3x323-576vac load regulation max. 50mv in s ingle use mode: static value, 0a ? 26a, see fig. 6-1 typ. 1500mv in parallel use mode: static value, 0a ? 26a, see fig. 6-2 ripple and noise voltage max. 130mvpp 20hz to 20mhz, 50ohm output current nom. 26.7a contin uously available at 36v, see fig. 6-1 and fig. 6-2 nom. 22.9a continuously available at 42v, see fig. 6-1 and fig. 6-2 nom. 40a short term (4s) available bonuspower ?*) , at 36v, see fig. 6-1 , fig. 6-2 and fig. 6-4 nom. 34.3a short term (4 s) available bonuspower ?*) , at 42v, see fig. 6-1 , fig. 6-2 and fig. 6-4 typ. 73a up to 25ms, output voltage stays above 30v, see fig. 6-4 , this peak current is available once every second. see chapter 24.2 for more peak current measurements. output power nom. 960w contin uously available at 36-42v nom. 1440w *) short term available bonuspower ?*) at 36-42v bonuspower ? time typ. 4s duration until the output voltage dips, see fig. 6-3 bonuspower ? recovery time typ. 7s overload fr ee time to reset power manager, see fig. 6-5 overload behavior cont. current see fig. 6-1 short-circuit current **) min. 27a continuous, lo ad impedance 40mohm, see fig. 6-1 max. 30a continuous, lo ad impedance 40mohm, see fig. 6-1 min. 40a short-term (4s), load impedance 40mohm, see fig. 6-1 max. 45a short-term (4s), load impedance 40mohm, see fig. 6-1 typ. 33a continuous, load impedance <10mohm max. 37a continuous, load impedance <10mohm output capacitance typ. 4 700 f included in th e power supply *) bonuspower ? , short term power capability (up to typ. 4s) the power supply is designed to support loads with a higher short-term power requirement without damage or shutdown. the short- term duration is hardware controlled by an output power manager. this bonuspower ? is repeatedly available. detailed information can be found in chapter 24.1 . if the power supply is loaded longer with the bonuspower ? than shown in the bonus-time diagram (see fig. 6-3 ), the max. output power is automatically reduced to 960w. **) discharge current of output capacitors is not included. ***) this is the maximum output voltage which can occur at the clockwise end position of the potentiometer due to tolerances. i t is not guaranteed value which can be achieved. the typical value is about 42.5v. dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 6/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput fig. 6-1 output voltage vs . output current in single use mode, typ. fig. 6-2 output voltage vs . output current in parallel use mode, typ. output voltage 0 0102030 6 12 18 42v 24 30 36 40 50a output current adjustment range a b a b a b short-term (4s) bonuspower continuously available output voltage (parallel use, typ.) 32v 02 03 0 34v 36v 38v 46v 40v 42v 44v 40a 10 adjustment range output current factory setting a b a b a b short-term (4s) bonuspower continuously available fig. 6-3 bonus time vs. output power fig. 6-4 dynamic overcurrent capability, typ. ma x . bonus time 0 100 120 130 140 150 170% 1 2 3 4 5s 110 160 output power m i n . output voltage (dynamic behavior, < 25ms) 0 0 6 12 18 42v 24 30 36 90 a 40 20 60 80 10 30 50 70 output current adjustment range fig. 6-5 bonuspower ? recovery time power demand 100% t limitation by power manager t output voltage bonus power disabled bonus time recovery time the bonuspower ? is available as soon as power comes on and after the end of an output short circuit or output overload. fig. 6-6 bonuspower ? after input turn-on fig. 6-7 bonuspower ? after output short 100% output voltage input voltage bonus power output 150% power short of output 100% output voltage bonus power output power 150% dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 7/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 7. h old - up t ime 3ac 400v *) 3ac 480v *) hold-up time typ. 50ms 50ms at 36v, 13.3a, see fig. 7-1 min. 40ms 40ms at 36v, 13.3a, see fig. 7-1 typ. 25ms 25ms at 36v, 26.7a, see fig. 7-1 min. 20ms 20ms at 36v, 26.7a, see fig. 7-1 *) curves and figures for operation on only 2 legs of a 3-phase system can be found in chapter 24.4 fig. 7-1 hold-up time vs. input voltage fig. 7-2 shut-down behavior, definitions 0 10 20 30 40 50ms 320 360 400 440 3x480vac input voltage hold-up time 36v, 13.3a, typ. 3 6 v , 2 6 . 7 a , t y p . 36v, 13.3a, min. 3 6 v , 2 6 . 7 a , m i n . - 5% hold-up time output voltage input voltage l1 l2 l3 dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 8/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 8. dc-ok r elay c ontact this feature monitors the output voltage, which is produced by the power suppl y itself. it is indepe ndent of a back-fed voltage from a unit connected in parallel to the power supply output. contact closes as soon as the output voltage reaches 90% of the adjusted output voltage. contact opens as soon as the output voltage dips more than 10% belo w the adjusted output voltage. short dips will be extended to a signal length of 250ms. dips shorter th an 1ms will be ignored. contact re-closes as soon as the output volt age exceeds 90% of th e adjusted voltage. contact ratings max 60vdc 0.3a, 30vdc 1a, 30vac 0.5a resistive load min 1ma at 5vdc mi n. permissible load isolation voltage see dielec tric strength table in section 20. fig. 8-1 dc-ok relay contact behavior 250ms 0.9* v adj < 1ms 10% 9/27 open v out = v adj open closed closed > 1ms 9. s hut - down i nput this feature allows a switch-off of the output of the power supply with a signal switch or an external voltage. the shut-down occurs immediately wh ile the turn-on is delayed up to 350ms. in a shut-down condition, the output voltage is <3v and the output power is <0.5w. the voltage between different minus pole output terminals must be below 1v when units are connected in parallel. in a series operation of multiple power supplies only wiring option a with individual signal switches is allowed. please note: - option c requires a current sink capability of the voltage source. do not use a blocking diode. - the shut-down function has no safety feature included. fig. 9-1 activation of the shut-down input 15 16 off: linked on : open shut- down input option a: 15 16 off: i > 0.3ma on : i < 0.1ma down input shut- option b: - collector) (via open i n.c. 15 16 off: u < 1v on : u = 4 -29v shut- down input option c: - (via external voltage + u n.c. dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 10. r emote c ontrol of o utput v oltage the shut-down input can also be used to remotely adjust the output voltage between typically 33vdc and 42vdc. all other functions of shut-dow n input remain the same. the control voltage is refe renced to the main ground (negative output voltage) fig. 10-1 remote control of the output voltage fig. 10-2 applying the control voltage output voltage 18v 0v 5v 21v 24v 27v 42v 30v 33v 39v control voltage 36v 10v potentiometer: 42v setting 36v setting 15 16 control voltage shut- down input 10/27 min. 0v max. +50v + n.c. - instructions: 1. set the unit into single use mode 2. set the output voltage adjustment (36- 42v) to the maximum desired voltage. 3. apply a control voltage to reduce the output voltage dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 11. e fficiency and p ower l osses efficiencies for 3-phase operation: 3ac 400v 3ac 480v efficiency typ. 95.3% 95.2% at 36v, 26.7a average efficiency *) typ. 94.7% 94.6% 25% at 6.7a, 25% at 13.3a, 25% at 20a. 25% at 26.7a power losses typ. 1.5w 1.5w with activated shut-down typ. 9.5w 9.8w at 36v, 0a (no load) typ. 24.1w 25.0w at 36v, 13.3a (half load) typ. 47.3w 48.4w at 36v, 26.7a (full load) *) the average efficiency is an assumption for a typical application where the power supply is loaded with 25% of the nominal load for 25% of the time, 50% of the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time and with 100% of the nominal load for the rest of the time. efficiencies when using only 2 legs of a 3-phase system: 2ac 400v 2ac 480v efficiency typ. 94.4% **) 94.7% **) at 36v, 26.7a power losses typ. 56.9w **) 53.7w **) at 36v, 26.7a (full load) **) curves can be found in chapter 24.4 fig. 11-1 efficiency vs. output current at 36v, typ. fig. 11-2 losses vs. output current at 36v, typ. efficiency 11/27 3 6 9 121518212427a 92 93 94 output current 95 96% 3x480vac 3x400vac power losses 0 3 6 9 12 15 18 21 27a 10 30 40 50 0 60w 24 20 output current 3x400vac 3x480vac fig. 11-3 efficiency vs. input voltage at 36v, 26.7a, typ. fig. 11-4 losses vs. input voltage at 36v, 26.7a, typ. efficiency 350 400 450 500 3x550vac 94.9 95.0 95.1 95.2 input voltage 95.3 95.4 95.5% power losses 350 400 450 500 3x550vac 46 47 44 45 input voltage 48 49 50w dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 12. l ifetime e xpectancy and mtbf 3ac 400v 3ac 480v calculated lifetime expectancy *) 363 000h *) 360 000h *) at 36v, 13.3a and 25c 128 000h 127 000h at 36v, 13.3a and 40c 202 000h *) 203 000h *) at 36v, 26.7a and 25c 71 000h 72 000h at 36v, 26.7a and 40c mtbf **) sn 29500, iec 61709 375 000h 369 000h at 36v, 26.7a and 40c 685 000h 678 000h at 36v, 26.7a and 25c mtbf **) mil hdbk 217f 158 000h 157 000h at 36v, 26.7a and 40c; ground benign gb40 211 000h 210 000h at 36v, 26.7a and 25c; ground benign gb25 *) the calculated lifetime expectancy shown in the table indicates the minimum operating hours (service life) and is determined by the lifetime expectancy of the built-in electrolytic capacitors. lifetime expectancy is specified in operational hours and is calcu lated according to the capacitors manufacturer specification. the manufacturer of the electrolytic capacitors only guarantees a maximum life o f up to 15 years (131 400h). any number exceeding this value is a calculated theoretical lifetime which can be used to compare devices. **) mtbf stands for m ean t ime b etween f ailure, which is calculated according to statistical device failures, and indicates reliability of a device. it is the statistical representation of the likelihood of a unit to fail and does not necessarily represent the life of a product. the mtbf figure is a statistical representation of the likelihood of a device to fail. a mtbf figure of e.g. 1 000 000h means that statistically one unit will fail ev ery 100 hours if 10 000 units ar e installed in the field. how ever, it can not be determined if the failed unit has been running for 50 000h or only for 100h. 13. f unctional d iagram fig. 13-1 functional diagram + + - - v out dc-ok contact output over- voltage protection pfc converter input fuses input filter input rectifier inrush limiter transient filter output voltage regulator power converter output filter dc ok relay output voltage monitor output power manager temper- ature shut- down overload led dc-ok led l2 l3 l1 single / parallel shut- down input shut- down 13 14 15 16 dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 12/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 14. t erminals and w iring the terminals are ip20 finger sa fe constructed and suitable for field and factory wiring. input output dc-ok, shut-down type screw termination screw termin ation spring-clamp termination solid wire 0.5-6mm 2 0.5-16mm 2 0.15-1.5mm 2 stranded wire 0.5-4mm 2 0.5-10mm 2 0.15-1.5mm 2 american wire gauge awg 20-10 awg 22-8 awg 26-14 max. wire diameter 2.8mm (including ferrules) 5.2mm (including ferrules) 1.5mm (including ferrules) wire stripping length 7mm / 0.28inc h 12mm / 0. 5inch 7mm / 0.28inch screwdriver 3.5mm slotted or cross- head no 2 3.5mm or 5mm slotted or cross-head no 2 3mm slotted (to open the spring) recommended tightening torque 1nm, 9lb .in 2.3nm, 20.5lb.in not applicable instructions: a) use appropriate copper cables that are designed for minimum operating temperatures of: 60c for ambient up to 45c and 75c for ambient up to 60c minimum 90c for ambient up to 70c minimum. b) follow national installation c odes and installation regulations! c) ensure that all strands of a strande d wire enter the terminal connection! d) do not use the unit without pe connection. e) unused terminal compartments should be securely tightened. f) ferrules are allowed. daisy chaining: daisy chaining (jumping from one power s upply output to the next) is allowed as long as the average output current through one terminal pin does not exceed 54a. if the current is higher, use a separate distribution terminal block as shown in fig. 14-2 . fig. 14-1 daisy chaining of outputs fig. 14-2 using distribution terminals load + - power supply + + - - output power supply + + - - output max 54a! distribution terminals load + - power supply + + - - output power supply + + - - output dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 13/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 15. f ront s ide and u ser e lements fig. 15-1 front side a input terminals (screw terminals) l1, l2, l3 line input ...pe (protective earth) input b output terminals (screw terminals, two pins per pole) + positive output C ne gative (return) output c parallel use single use selector set jumper to parallel use wh en power supplies are connected in parallel to increase the output power. in order to achieve a sharing of the load current between the individual power supplies, the parallel use regulat es the output voltage in such a manner that the voltage at no load is approx. 4% higher than at nominal load. see also chapter 24.7 . a missing jumper is equal to a single use mode. d output voltage potentiometer multi turn potentiometer; open the flap to se t the output voltage. factory set: 48.0v at full out put current, single use mode. e dc-ok led (green) on, when the voltage on the output terminals is >90% of the adjusted output voltage f overload led (red) - on, when the voltage on the output terminals is <90% of the adjusted output voltage, or in case of a short circuit in the output. - flashing, when the shut-down has been activated or the unit has switched off due to over-temperature. - input voltage is required g dc-ok relay contact the dc-ok relay contact is sync hronized with the dc-ok led. see chapter 8 for details. h shut-down and remote control input allows the power supply to be s hut down. can be activated with a switch contact or an external voltage. the remote control input allows adjusting the output voltage. see chapter 9 and 10 for details. indicators, leds overload led dc-ok led dc-ok contact normal mode off on closed during bonuspower ? off on closed overload (vout < 90%) on off open output short circuit on off open temperature shut-down flashing off open active shut-down input flashing off open no input power off off open dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 14/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 16. emc the power supply is suitable for applicat ions in industrial environm ent as well as in reside ntial, commercia l and light industry environment without any restrictions. a detailed emc re port is available on request. all results assume a three phase operation f the power supply. emc immunity according generic standards: en 61000-6-1 and en 61000-6-2 electrostatic discharge en 61000-4-2 contact discharge air discharge 8kv 15kv criterion a criterion a electromagnetic rf field en 61000-4-3 80mhz-2.7ghz 10v/m criterion a fast transients (burst) en 61000-4-4 input lines output lines dc-ok signal (coupling clamp) 4kv 2kv 2kv criterion a criterion a criterion a surge voltage on input en 61000-4-5 l1 ? l2, l2 ? l3, l1 ? l3 l1 / l2 / l3 ? pe 2kv 4kv criterion a criterion a surge voltage on output en 61000-4-5 + ? - + / - ? pe 1kv 1kv criterion a criterion a surge voltage on dc-ok en 61000-4-5 dc-ok signal ? pe 1kv criterion a conducted disturbance en 61000-4- 6 0.15-80mhz 10v criterion a mains voltage dips (dips on three phases) en 61000-4-11 0% of 380vac (0vac) 0% of 480vac (0vac) 0vac, 20ms 0vac, 20ms criterion a, criterion a mains voltage dips (dips on two phases) en 61000-4-11 40% of 380vac (152vac) 40% of 480vac (192vac) 70% of 380vac (266vac) 70% of 480vac (336vac) 200ms 200ms 500ms 500ms criterion a criterion a criterion a criterion a voltage interruptions en 61000-4-11 0% of 200vac (=0v) 5000ms criterion c voltage sags semi f47 0706 dips on two phases according to section 7.2. of the semi f47 standard 80% of 380vac (304vac) 70% of 380vac (266vac) 50% of 380vac (160vac) 1000ms 500ms 200ms criterion a criterion a criterion a powerful transients vde 0160 over entire load range 1550v, 1.3ms criterion a criterions: a: power supply shows normal operation behavior within the defined limits. c: temporary loss of function is possible. power supply may shut-down and restarts by itself. no damage or hazards for the powe r supply will occur. emc emission according generic standards: en 61000-6-3 and en 61000-6-4 conducted emission input lines en 55011, en 55022, fcc part 15, cispr 11, cispr 22 class b conducted emission output lines iec/cispr 16-1-2, iec/cispr 16-2- 1 5db higher than average limits for dc power port according en 61000-6-3 **) radiated emission en 55011, en 55022 class b harmonic input current en 61000-3- 2 fulfilled for class a equipment voltage fluctuations, flic ker en 61000-3-3 fulfilled *) this device complies with fcc part 15 rules. operation is subjected to fo llowing two conditions: (1) this device may not cause ha rmful interference, and (2) this device must accept any interferenc e received, including interference that may cause undesired operation. *) tested with constant current loads, non pulsing **) restrictions apply for applications in residential, commercial and light-industrial environments, where local dc power netw orks according to en 61000-6-3 are involved. no restricti ons for all kinds of industrial applications. dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 15/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput switching frequencies the power supply has three converters with three different switching frequencies included. one is nearly cons tant. the others are variable. switching frequency 1 105khz resonant converter, nearly constant switching frequency 2 1khz to 150khz boost converter, load dependent switching frequency 3 40khz to 300khz pfc conv erter, input voltage and load dependent 17. e nvironment operational temperature *) -25c to +70c (-13f to 158f) reduce output power according fig. 17-1 storage temperature -40 to +85c (-40 f to 185f) for storage and transportation output de-rating 24w/c 60-70c (140f to 158f) humidity **) 5 to 95% r.h. iec 60068-2-30 vibration sinusoidal 2-17.8h z: 1.6mm; 17.8-500hz: 1g ***) 2 hours / axis iec 60068-2-6 shock 15g 6ms, 10g 11ms ***) 3 bumps / direction, 18 bumps in total iec 60068-2-27 altitude 0 to 2000m (0 to 6 560ft) without any restrictions 2000 to 6000m (6 560 to 20 000ft) reduce output power or ambient temperature, see fig. 17-2 iec 62103, en 50178, overvoltage category ii altitude de-rating 60w/1000m or 5c/1000m > 2000m (6500ft), see fig. 17-2 over-voltage category iii iec 62103, en 50178, altitudes up to 2000m ii altitudes from 2000m to 6000m degree of pollution 2 iec 62103, en 50178, not conductive labs compatibility the unit does not re lease any silicone or other labs-criti cal substances and is suitable for use in paint shops. *) operational temperature is the same as the ambient or surrounding temperature and is defined as the air temperature 2cm bel ow the unit. curves and figures for operation on only 2 legs of a 3-phase system can be found in chapter 24.4 . **) do not energize while condensation is present. ***) higher levels allowed when using the wall mounting bracket zm2.wall fig. 17-1 output current vs. ambient temp. fig. 17-2 output current vs. altitude allowed output current at 36v 16/27 0 -25 0 20 40 70c 5 10 15 20 35 40a continuous 60 ambient temperature short-term (4s) 25 30 allowed output current at 36v 0 0 2000 4000 10 20 30 25 35 40a 6000m altitude 5 15 c o n t i n u o u s s h o r t - t e r m ( 4 s ) a c a... tamb < 60c b... tamb < 50c c... tamb < 40c b dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 18. p rotection f eatures output protection electronically protected against overload , no-load and short-circuits *) output over-voltage pr otection typ. 45.5vdc max. 48vdc in case of an internal pow er supply defect, a redundant circuit limits the maximum output voltage. the output shuts down and automatically attempts to restart. degree of protecti on ip 20 en/iec 60529 caution: for use in a contro lled environment according to csa 22.2 no 107.1-01. penetration protection > 5mm e.g. screws, small parts over-temperature protection yes output shut-down with automatic restart input transient protection mo v (metal oxide varistor) internal input fuse included not user replaceable *) in case of a protection event, audible noise may occur. 19. s afety f eatures input / output separation *) selv iec/en 60950-1 pelv iec/en 60204-1, en 50178, iec 62103, iec 60364-4-41 double or reinforced insulation class of protection i pe (protect ive earth) connection required isolation resistance > 5mohm input to output, 500vdc pe resistance < 0.1ohm touch current (leakage current) typ. 0.35ma / 0. 64ma 3x400vac, 50hz, tn-,tt-mains / it-mains typ. 0.45ma / 0.91ma 3x480vac, 60hz, tn-,tt-mains / it-mains max. 0.45ma / 0.78ma 3x440vac, 50hz, tn-,tt-mains / it-mains max. 0.60ma / 1.20ma 3x528vac, 60hz, tn-,tt-mains / it-mains *) double or reinforced insulation dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 17/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 20. d ielectric s trength the output voltage is floating and has no ohmic connection to the ground. type and factory tests are conducted by the manufacturer. field tests may be c onducted in the field using the appropr iate test equipment which applies the voltage with a slow ramp (2s up and 2s down). connect all phase terminals togeth er as well as all ou tput poles before conducting the test. when testing, set the cut-off current settings to the value in the table below. fig. 20-1 dielectric strength a b c d type test 60s 2500vac 3000vac 500vac 500vac factory test 5s 2500vac 2500vac 500vac 500vac field test 5s 2000vac 2000vac 500vac 500vac cut-off current setting > 10ma > 10ma > 40ma > 1ma a d c b b *) l1 input earth l3 l2 dc-ok 13 14 output 15/16 +/- shut-down to fulfil the pelv requirements acco rding to en 60204-1 6.4.1, we recommend that either the + pole, the C pole or any other part of the output circuit shall be conne cted to the protective earth system. this helps to avoid si tuations in which a load starts unexpectedly or can not be swit ched off when unnoticed earth faults occur. b*) when testing input to dc-ok ensure that the max. voltage between dc-ok and the output is not exceeded (column d). we recomm end connecting dc-ok pins and the output pins together when performing the test. 21. a pprovals ec declaration of conformity the ce mark indicates conformance with the - emc directive 2004/108/ec, - low-voltage directive (lvd) 2006/95/ec and - rohs directive 2011/65/ec. iec 60950-1 2 nd edition cb scheme, information technology equipment applicable for altitudes up to 2000m. ul 508 ind. cont. eq. listed for use as industri al control equipment; u.s.a. (ul 508) and canada (c22.2 no. 107-1-01); e-file: e198865 ul 60950-1, 2 nd edition recognized for use as information technology equipment, level 5; u.s.a. (ul 60950-1) and canada (c22.2 no. 60950-1); e-file: e137006 applicable for altitudes up to 2000m. dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 18/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 22. p hysical d imensions and w eight weight 1500g / 3.3lb din-rail use 35mm din-rails according to en 60715 or en 50022 with a height of 7.5 or 15mm. the din-rail height must be added to the unit depth (127mm) to calculate the total required installation depth. installation clearances see chapter 2 fig. 22-1 front view fig. 22-2 side view dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 19/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 23. a ccessories 23.1. zm2.wall - w all mounting bracket this bracket is used to mount specific dimension units onto a flat surface without utilizing a din-rail. 23.2. yr40.482 - r edundancy m odule the yr40.482 is equipped with two input ch annels (20a each), wh ich are individually decoupled by utilizing mosfet technology. the output current ca n go as high as 40a. using mosfets instead of diodes reduces the heat generation and the voltage drop between input and output. each power supply needs it own redundancy modu le, since the current of each power supply is greater than the max. ra ting of 20a of one input of the redundancy module. both inputs should be connected in parallel. the yr40.482 does not require an a dditional auxiliary voltage a nd is self-powered even in case of a short circuit across the output. fig. 23-1 typical 1+1 redundant configuration for 26.7a with a dual redundancy module 36v 26.7a load failure monitor l1 l2 l3 pe + + - - 36v, 26.7a parallel use single use dc- ok qt40.361 36v power supply 20/27 l1 l2 pe i i i i i i l3 yr40.482 redundancy module input 1 input 2 output + - + - + - yr40.482 redundancy module input 1 input 2 output + - + - + - l1 l2 l3 pe + + - - 36v, 26.7a parallel use single use dc- ok qt40.361 36v power supply dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 24. a pplication n otes 24.1. r epetitive p ulse l oading typically, a load current is not constant and varies over time. this power suppl y is designed to support loads with a higher short-term power demand (=bonuspower ? ). the short-term duration is ha rdware controlled by an output power manager and is available on a repeated basis. if the bonuspower ? load lasts longer than the hardware controller allows it, the output volt age will dip and the next bonuspower ? is available after the bonuspower ? recovery time (see chapter 6 ) has elapsed. to avoid this, the following rules must be met: a) the power demand of the pulse must be be low 150% of the nominal output power. b) the duration of the pulse power must be shorter than the allowed bonuspower ? time. (see output section) c) the average (r.m.s.) output current must be below the specified cont inuous output current. if the r.m.s. current is higher, the unit will respond wi th a thermal shut-down afte r a period of time. use the maximum duty cycle curve ( fig. 24-2 ) to check if the average output cu rrent is below the nominal current. d) the duty cycle must be below 0.75. fig. 24-1 repetitive pulse loads, definitions fig. 24-2 max. duty cycle curve 21/27 100% p peak t peak t 0 max. 150% 100 p 0 150% 0 0.2 0.4 0.6 0.75 duty cycle 110 120 130 140 p 0 = 1 0 % p 0 = 5 0 % p 0 = 7 5 % p 0 = 1 0 0 % p peak p 0 base load (w) p peak pulse load (above 100%) t 0 duration between pulses (s) t peak pulse duration (s) d uty c ycle t 0 = t peak - (d uty c ycle x t peak ) t peak + t 0 t peak d uty c ycle = example: a load is powered continuously with 480w (= 50% of the rated output load). fr om time to time a peak power of 1440w (= 150% of the rated out put load) is needed for 1 second. the question is: how often can this pulse be supplied without overloading the power supply? - make a vertical line at p peak = 150% and a horizontal line where the vertical line crosses the p 0 = 50% curve. read the max. duty cycle fro m the duty cycle-axis (= 0.37) - c alculate the required pause (base load) length t 0 : - r esult: the required pause length = 1.7s - max. repetition rate = pulse +pause length = 2.7s more examples for pulse load compatibility: p peak p 0 t peak t 0 p peak p 0 t peak t 0 1440w 960w 1s >25s 1440w 480w 0.1s >0.16s 1440w 0w 1s >1.3s 1440w 480w 1s >1.6s 1200w 480w 1s > 0.75s 1440w 480w 3s >4.9s d uty c ycle t 0 = t peak - (d uty c ycle x t peak ) 0.37 1s - (0.37 x 1s) == 1 . 7 s dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 24.2. p eak c urrent c apability the power supply can deliver peak currents (up to several m illiseconds) which are higher than the specified short term currents. this helps to start current demanding loads. solenoids, contactors and pneumatic modules often have a steady state coil and a pick-up coil. the inrush current demand of the pick-up coil is several times higher than the steady-state current and usually exceeds the nominal ou tput current (including the bonuspower ? ). the same situation applies when starting a capacitive load. the peak current capability also ensures the safe operati on of subsequent circuit breakers of load circ uits. the load branches are often individually protected with circuit breakers or fuses. in ca se of a short or an overload in one branch circuit, the fuse or circuit breaker need a certain amount of over-current to open in a timely manner. this avoids voltage loss in adjacent circuits. the extra current (peak current) is supplie d by the power converter and the built -in large sized output capacitors of the power supply. the capacito rs get discharged during such an event, which causes a vo ltage dip on the output. the following two examples show typical voltage dips: fig. 24-3 peak load with 2x the nominal current for 50ms, typ. fig. 24-4 peak load with 5x the nominal current for 5ms, typ. 10ms/div output voltage output current 36v 0a 53.4a 27.6v 1ms/div output voltage output current 36v 0a 133.5a 17.5v 53.4a peak load (resistive) for 50ms output voltage dips from 36v to 27.6v. 133.5a peak load (resistive) for 5ms output voltage dips from 36v to 17.5v. please note: the dc-ok relay triggers when the voltage dips more than 10% for longer than 1ms. peak current voltage dips typ. from 36v to 27.6v at 53.4a for 50ms, resistive load typ. from 36v to 17v at 133. 5a for 2ms, resistive load typ. from 36v to 17.5v at 13 3.5a for 5ms, resistive load 24.3. e xternal i nput p rotection the unit is tested and approved for branch circuits up to 30a (u.s.a.) and 32a (iec). an external protection is only required if the supplying branch has an ampacity greater than this. check also local codes and local requirements. in some countries local re gulations might apply. if an external fuse is necessary or utilized, minimum requirements need to be considered to avoid nuisance tripping of the circuit breaker. a mi nimum value of 6a b- or c-characteristic breaker should be chosen. dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 22/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 24.4. u sing only 2 l egs of a 3-p hase s ystem no external protection devices are re quired to protect ag ainst a phase-loss failure. dc l1 l2 l3 open ac l1 l2 l3 pe power supply this power supply can also be permanently operated on two legs of a 3- phase system. however, it is not recommended for this power class since the supplying 3-phase network can become unbalanced. the output power must be reduced acco rding to the curves below when operation on only two legs of a 3-pha se system. a long-term exceeding of these limits will result in a th ermal shut-down of the unit. a use below 340vac with more than 22a output cu rrent can also result in a thermal shut-down. during power-on, some start-up attempts can occur until a permanent output power is available. emc performance, hold-up time, losses and output ripple differ from a three phase ope ration. therefore, check suitability of your in dividual application. such use is not included in th e ul approval. additional tests might be necessa ry when the complete system has to be approved according to ul 508 or ul60950-1. the screw of the terminal which remain s unused must be securely tightened. fig. 24-5 output current vs. ambient temperature fig. 24-6 hold-up time vs. input voltage allowed output current for use on only two legs of a 3-phase system 23/27 ambient temperature 0 -25 0 20 70c 5 10 20 30a 40 60 b a c 15 25 a . . . 2 x 4 6 0 t o 5 5 2 v a c b . . . 2 x 3 4 0 t o 4 6 0 v a c c . . . m a x . 6 0 s e c o n d s 0 10 20 30 320 360 400 440 3x480vac 50ms hold-up time for use on only two legs of a three phase system 36v, 13.3a, typ. input voltage 3 6 v , 2 6 . 7 a , t y p . 40 36v, 13.3a, min. 3 6 v , 2 6 . 7 a , m i n . fig. 24-7 efficiency vs. output current at 36v fig. 24-8 losses vs. output current at 36v power losses for use on only two legs of a 3-phase system 0 3 6 9 12151821 27a efficiency for use on only two legs of a 3-phase system 3 6 9 121518212427 a 92 93 94 output current 95 96% 2x400vac 2x480vac 20 10 40 50 output current 60w 24 2x400vac 2x480vac 30 dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 24.5. c harging of b atteries the power supply can be used to char ge lead-acid or maintenance free batte ries. (three 12v batteries in series) instructions for charging batteries: a) set output voltage (measured at no load and at the battery end of the cable) very precisely to the end-of-charge voltage. end-of-charge voltage 41.7v 41.25v 40.8v 40.35v battery temperature 10c 20c 30c 40c b) use a 32a or 40a circuit breaker (or blocking diode) between th e power supply and the battery. c) ensure that the output current of the power supply is below the allowe d charging current of the battery. d) use only matched batteries when putting 12v types in series. e) the return current to the power s upply (battery discharge current) is typ. 25ma when the power supply is switched off (except in case a blocking diode is utilized). 24.6. o utput c ircuit b reakers standard miniature circuit breakers (mcbs or ul 1077 circuit breakers) are commonl y used for ac-supply systems and may also be used on dc branches. mcbs are designed to protect wires and ci rcuits. if the ampere value and the char acteristics of the mcb are adapted to the wire size that is used, the wiring is considered as thermally safe rega rdless of whether the mcb opens or not. to avoid voltage dips and under-voltage situations in adjacent 36v branches wh ich are supplied by the same source, a fast (magnetic) tripping of the mcb is desired. a quick shutdown within 10ms is necessary corresponding roughly to the ride-through time of plc's. this re quires power supplies with high current reserves and large output capacitors. furthermore, the impedance of the faulty branch must be sufficiently small in or der for the current to actually flow. the best current reserve in the power su pply does not help if ohms law does not permit current flow. the following table has typical test results showing which b- and c-characteristic mcbs magneti cally trip depending on the wire cross section and wire length. fig. 24-9 test circuit maximal wire length *) for a fast (magnetic) tripping: 0.75mm2 1.0mm2 1.5mm2 2.5mm2 c-2a 51m 63m 101m 143m c-3a 43m 57m 84m 129m c-4a 34m 44m 64m 103m c-6a 15m 21m 32m 49m c-8a 8m 11m 14m 25m c-10a 5m 7m 9m 17m c-13a 2m 3m 4m 8m b-6a 33m 43m 56m 102m b-10a 18m 24m 37m 55m b-13a 9m 19m 30m 47m mcb power supply 24/27 ac dc + - load + - b-16a 4m 6m 9m 14m wire length s1... fault simulation switch s1 *) dont forget to consider twice the distance to the load (or cable length) when calculating the total wire length (+ and C wi re). dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 24.7. p arallel u se to i ncrease o utput p ower power supplies from the same series (q-s eries) can be para lleled to increase the output power. the output voltage sh all be adjusted to the same value (100mv) in single use mode with the same load conditions on all units, or the units can be left with the factor y settings. after the adjustments, the jumper on the front of the unit sh all be moved from single use to parallel use, in order to achieve lo ad sharing. the parallel use mode regulates the output voltage in such a manner that the voltage at no load is approx. 4% higher than at nom inal load. see also chapter 6 . if no jumper is plugged in, the unit is in single use mode. factory setti ng is also single use mode. unit b - + load + - ac dc ac dc - + unit a if more than three units are connected in parallel, a fuse or circui t breaker with a rating of 32a or 40a is required on each output. alternatively, a diode or redundancy module can also be utilized. keep an installation clearance of 15mm (left / right) be tween two power supplies and avoid installing the power supplies on top of each other. do not use power supplies in paralle l in mounting orientations other than the standard mounting orientation (te rminals on the bottom of the unit) or in any ot her condition where a derating of the output current is required (e.g. altitude, above 60c, ). pay attention that leakage current, emi, inrush current, ha rmonics will increase when usin g multiple power supplies. 24.8. p arallel u se for r edundancy power supplies can be paralleled fo r redundancy to gain higher system ava ilability. redundant systems require a certain amount of extra power to support th e load in case one power supply unit fa ils. the simplest way is to put two power supplies in parallel. this is called a 1+1 redundancy. in case one power supply unit fails, the other one is automatically able to support the lo ad current without any interruption. redundant systems for a higher power demand are usually built in a n+1 method. e.g. five power supplies, each rated for 25a are paralleled to build a 100a redundant system. for n+1 redundancy the same restrictions apply as for in creasing the output power, see also chapter 24.7 . please note: this simple way to build a redundant system does not cover failures such as an internal short circuit in the secondary side of the power supply. in such a case, the defective unit beco mes a load for the other power supplies and the output voltage can not be mainta ined any more. this can be avoided by utilizing redundancy modules, which have decoupling devices (diode s or mosfets) included. further information and wiring configurati ons can be found in chapter 23.2 . recommendations for building redundant power systems: a) use separate input fuses for each power supply. a separate s ource for each supply when possible increases the reliability of the redundant system. b) set the power supply in to parallel use mode. c) monitor the individual power supply un its. therefore, use th e dc-ok relay contact of the qt40 power supply. d) it is desirable to set the output voltages of all units to the same value ( 100m v) or leave it at the factory setting. dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 25/27
qt40.361 q-series 36v, 26.7a, t hree p hase i nput 24.9. s eries o peration power supplies of the same type can be connected in series for higher output voltages. it is possible to connec t as many units in series as needed, providing the sum of the output volt age does not exceed 150vdc. voltages with a potential above 60vdc are not selv any more and can be dangerous. such voltages must be installed with a protection against touching. 26/27 earthing of the output is required when the sum of the output voltage is above 60vdc. avoid return voltage (e.g. from a decelerating motor or battery) which is applied to the output terminals. keep an installation clearance of 15 mm (left / right) between two power supplies and avoid installing the power supplies on top of each other. do not use power supp lies in series in mounting orientations other than the sta ndard mounting orientat ion (terminals on the bottom of the unit). unit b - + load + - ac dc ac dc - + unit a earth (see notes) pay attention that leakage current, emi, inrush current, ha rmonics will increase when usin g multiple power supplies. 24.10. i nductive and c apacitive l oads the unit is designed to supply any kind of load s, including capacitive and inductive loads. 24.11. b ack - feeding l oads loads such as decelerating motors and induc tors can feed voltage back to the power supply. this feature is also called return voltage immunity or resi stance against back- e.m.f. (e lectro m agnetic f orce). this power supply is resistant and does not show malfunctioning when a load f eeds back voltage to the power supply. it does not matter whether the power supply is on or off. the maximum allowed feed-back- voltage is 50vdc. the absorbin g energy can be calculated according to the built-in large sized output capacitor wh ich is specified in chapter 6 . 24.12. u se in a t ightly s ealed e nclosure when the power supply is installed in a tightly sealed encl osure, the temperature inside the enclosure will be higher than outside. in such situations, th e inside temperature defi nes the ambient temperatur e for the power supply. the following measurement results can be used as a reference to estimate the temperature rise inside the enclosure. the power supply is placed in the middle of the box , no other heat producing items are inside the box enclosure: rittal typ ip66 box pk 9522 100, plastic, 254x180x165mm load: 36v, 21.4a; (=80%) lo ad is placed outside the box input: 230vac temperature inside enclosure: 50.2c (i n the middle of the right side of the pow er supply with a distance of 2cm) temperature outside enclosure: 21.2c temperature rise: 29.0k dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany
qt40.361 q-series 36v, 26.7a, t hree p hase i nput dec. 2016 / rev. 1.3 ds-qt40.361-en all parameters are specified at 36v, 26.7a, 3x400vac, 25c ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com phone +49 89 9278 0 germany 24.13. m ounting o rientations mounting orientations ot her than all terminals on the bottom require a reduction in continuous output power or a limitation in the maximum allowed ambien t temperature. the amount of reduction influences the lifetime expectancy of the power supply. therefore, tw o different derating curves for cont inuous operation can be found below: curve a1 recommended output current. curve a2 max allowed output current (res ults in approximately half the lifetime expectancy of a1). fig. 24-10 mounting orientation a (standard orientation) power supply input output output current 0 10 20 30 40 60c 7 14 21 28a 50 a 1 ambient temperature fig. 24-11 mounting orientation b (upside down) power supply output input output current 10 20 30 40 60c 50 a 2 ambient temperature a 1 0 7 14 21 28a fig. 24-12 mounting orientation c (table-top mounting) output current 10 20 30 40 60c 50 ambient temperature a 1 a 2 0 7 14 21 28a fig. 24-13 mounting orientation d (horizontal cw) power supply output input output current 10 20 30 40 60c 50 ambient temperature a 1 a 2 0 7 14 21 28a fig. 24-14 mounting orientation e (horizontal ccw) power supply output input output current 10 20 30 40 60c 50 ambient temperature a 1 a 2 0 7 14 21 28a 27/27

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