QT20.361

QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series POWER SUPPLY             3AC 380-480V Wide-range Input Also Specified for 2-Phase Operation 94.8% Full Load and Excellent Partial Load Efficiencies Width only 65mm, Weight only 870g 50% BonusPower®, 720W for up to 4s Active Power Factor Correction PFC Active Filtering of Input Transients Full Power Between -25°C and +60°C Extremely Low Input Inrush Current Surge DC-OK Relay Contact Quick-connect Spring-clamp Terminals 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 compact sizes which are achieved by a synchronous rectification and other unique design details. Output voltage Adjustment range Output current 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 and virtually no input inrush current make installation and usage simple with no jumper and switches necessary. Diagnostics are easy due to the DC-ok relay, a green DC-OK LED and the red overload LED. Unique quick-connect spring-clamp terminals allow a safe and fast installation and a large international approval package for a variety of applications makes this unit suitable for nearly every application. ORDER NUMBERS DC 36V 36 – 42V 13.3 – 11.4A 20 – 17.1A Output power 480W 720W Output ripple < 100mVpp Input voltage 3AC 380-480V Mains frequency 50-60Hz AC Input current 0.79 / 0.65A Power factor 0.94 / 0.95 AC Inrush current typ. 3A peak Efficiency 94.8 / 94.6% Losses 26.3 / 27.4W Temperature range -25°C to +70°C Derating 12W/°C Hold-up time typ. 22 / 22ms Dimensions 65x124x127mm Weight 870g / 1.92lb nominal continuous short term (4s) continuous short term (4s) 20Hz to 20MHz ±15% ±6% at 3x400 / 480Vac at 3x400 / 480Vac at 3x400 / 480Vac at 3x400 / 480Vac operational +60 to +70°C at 3x400 / 480Vac WxHxD MARKINGS Power Supply QT20.361 Accessory ZM1.WALL ZM14.SIDE YR40.482 Wall mount bracket Side mount bracket Redundancy module UL 508 IEC60950-1 UL 60950-1 Class I Div 2 Marine Marine Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 1/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series INDEX Page 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Intended Use .......................................................3 Installation Instructions ......................................3 AC-Input...............................................................5 Input Inrush Current ...........................................6 DC-Input...............................................................6 Output .................................................................7 Hold-up Time .......................................................9 DC-OK Relay Contact ..........................................9 Efficiency and Power Losses..............................10 Lifetime Expectancy and MTBF.........................11 Functional Diagram...........................................11 Terminals and Wiring ........................................12 Front Side and User Elements ...........................13 EMC ....................................................................14 Environment ......................................................15 Protection Features ...........................................16 Safety Features ..................................................16 Dielectric Strength ............................................17 Approvals and Fulfilled Standard .....................18 Regulatory Compliance .....................................18 Page 21. Physical Dimensions and Weight ..................... 19 22. Accessories ........................................................ 20 22.1. ZM1.WALL – Wall/Panel mounting .......... 20 22.2. ZM14.SIDE - Side Mounting Bracket ........ 21 22.3. YR40.482 - Redundancy Module .............. 22 23. Application Notes ............................................. 23 23.1. Repetitive Pulse Loading .......................... 23 23.2. Peak Current Capability ........................... 24 23.3. External Input Protection ......................... 24 23.4. Using only 2 Legs of a 3-Phase System .... 25 23.5. Charging of Batteries ............................... 25 23.6. Output Circuit Breakers............................ 26 23.7. Series Operation ....................................... 26 23.8. Parallel Use to Increase Output Power .... 27 23.9. Parallel Use for Redundancy .................... 27 23.10. Inductive and Capacitive Loads................ 27 23.11. Back-feeding Loads .................................. 28 23.12. Use in a Tightly Sealed Enclosure ............ 28 23.13. Mounting Orientations ............................ 29 The information given in this document is correct to the best of our knowledge and experience at the time of publication. If not expressly agreed otherwise, this information does not represent a warranty in the legal sense of the word. As the state of our knowledge and experience is constantly changing, the information in this data sheet is subject to revision. We therefore kindly ask you to always use the latest issue of this document (available under www.pulspower.com). No part of this document may be reproduced or utilized in any form without our prior permission in writing. Some parts of this unit are patent by PULS (US patent No 091662,063, Des. 424,529, …). TERMINOLOGY AND ABREVIATIONS PE and symbol 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”. T.B.D. To be defined, value or description will follow later. AC 400V A figure displayed with the AC or DC before the value represents a nominal voltage with standard tolerances included. E.g.: DC 12V describes a 12V battery disregarding 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 implied preference. shall A key word indicating a mandatory requirement. should A key word indicating flexibility of choice with a strongly preferred implementation. Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 2/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 1. INTENDED USE This device is designed for installation in an enclosure and is intended for commercial use, such as in industrial control, process control, monitoring, measurement equipment or the like. Do not use this device in equipment, where malfunctioning may cause severe personal injury or threaten human life without additional appropriate safety devices, that are suited for the end-application. If this device is used in a manner outside of its specification, the protection provided by the device may be impaired. 2. INSTALLATION INSTRUCTIONS WARNING - Risk of electrical shock, fire, personal injury or death. Turn power off before working on the device and protect against inadvertent re-powering. Do not open, modify or repair the device. Use caution to prevent any foreign objects from entering into the housing. Do not use in wet locations or in areas where moisture or condensation can be expected. Do not touch during power-on, and immediately after power-off. Hot surface may cause burns. Obey the following installation instructions: This device may only be installed and put into operation 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 malfunction should occur during installation or operation, immediately turn power off and send unit to the factory for inspection. Install device in an enclosure providing protection against electrical, mechanical and fire hazards. Install the device onto a DIN-rail according to EN 60715 with the input terminals on the bottom of the device. Other mounting orientations require a reduction in output current. Make sure that the wiring is correct by following all local and national codes. Use appropriate copper cables that are designed for a minimum operating temperature of 60°C for ambient temperatures up to +45°C, 75°C for ambient temperatures up to +60°C and 90°C for ambient temperatures up to +70°C. Use ferrules for wires on the input terminals. Ensure that all strands of a stranded wire enter the terminal connection. The device is designed for pollution degree 2 areas in controlled environments. No condensation or frost is allowed. The enclosure of the device provides a degree of protection of IP20. The enclosure does not provide protection against spilled liquids. The device is designed for overvoltage category II zones. Below 2000m altitude the device is tested for impulse withstand voltages up to 4kV, which corresponds to OVC III according to IEC 60664-1. The device is designed as “Class of Protection I” equipment according to IEC 61140. Do not use without a proper PE (Protective Earth) connection. The device is suitable to be supplied from TN, TT or IT mains networks. The continuous voltage between the input terminal and the PE potential must not exceed 400Vac. The device is not designed to be used on corner grounded delta systems. A disconnecting means shall be provided for the input of the device. The device is designed for convection cooling and does not require an external fan. Do not obstruct airflow and do not cover ventilation grid! The device is designed for altitudes up to 5000m (16400ft). Above 2000m (6560ft) a reduction in output current is required. Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and right side. Increase the 5mm to 15mm in case the adjacent device is a heat source. When the device is permanently loaded with less than 50%, the 5mm can be reduced to zero. The device is designed, tested and approved for branch circuits up to 20A without additional protection device. If an external fuse is utilized, do not use circuit breakers smaller than 6A B- or 3A C-Characteristic to avoid a nuisance tripping of the circuit breaker. Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 3/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series The maximum surrounding air temperature is +70°C (+158°F). The operational temperature is the same as the ambient or surrounding air temperature and is defined 2cm below the device. The device is designed to operate in areas between 5% and 95% relative humidity. Notes for use in hazardous location areas: The QT20.361 is suitable for use in Class I Division 2 Groups A, B, C, D locations. WARNING EXPLOSION HAZARDS! Substitution of components may impair suitability for this environment. Do not disconnect the unit or operate the voltage adjustment unless power has been switched off or the area is known to be non-hazardous. Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 4/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 3. AC-INPUT The unit is optimized to operate on a three phase system. An operation on only two legs of a three-phase system is possible with slightly different parameters. See chapter 22.4 for details. AC input AC input range Suitable mains systems Allowed voltage L to Earth Input frequency Turn-on voltage Shut-down voltage nom. Input current Power factor*) Start-up delay Rise time typ. typ. typ. typ. typ. 3AC 400V 0.79A 0.94 350ms 30ms 40ms 3AC 480V 0.65A 0.95 290ms 30ms 40ms Turn-on overshoot max. 500mV 500mV max. nom. typ. typ. Wide-range input Continuous operation Line (L) must not be earthed (grounded) Continuous, IEC 60664-1 ±6% Steady-state value, load independent, see Fig. 3-1 Steady-state value, load independent, see Fig. 3-1 At 36V, 13.3A, see Fig. 3-3 At 36V, 13.3A, see Fig. 3-4 See Fig. 3-2 At 36V, 13.3A, resistive load see Fig. 3-2 At 36V, 13.3A, resistive load with an additional 13mF capacitor 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 Input Voltage Rated input range L1 L2 L3 Turn-on Shut-down POUT Fig. 3-2 Turn-on behavior, definitions VIN 242V 263V 323V Start-up delay 552Vac Fig. 3-3 Input current vs. output load at 36V Input Current (A), typ. 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 - 5% Output Voltage c Va 00 4 3x Vac 480 3x 1.0 Power Factor, typ. 0.95 3x 480Vac 0.9 3x 400Vac 0.8 1.5 3 4.5 6 7.5 9 10.5 12 13.5 Rise Time Fig. 3-4 Power factor vs. output load at 36V 0.85 Output Current (A) Overshoot *) 3AC 380-480V 3x 323-552Vac TN, TT, IT 400Vac 50–60Hz 3x 263Vac 3x 242Vac 0.75 1.5 Output Current (A) 3 4.5 6 7.5 9 10.5 12 13.5 Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 5/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 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 and after short input voltage interruptions to a very low value. Inrush current*) Inrush energy Inrush delay *) max. typ. max. typ. 3AC 400V 10Apeak 3Apeak 1A2s 270ms 3AC 480V 10Apeak 3Apeak 1A2s 220ms 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 behavior at nominal load and 25°C ambient temperature 5. DC-INPUT Do not operate this power supply with DC-input voltage. Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 6/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 6. OUTPUT Output voltage Adjustment range Factory setting Line regulation Load regulation Ripple and noise voltage Output current – continuous Output current – up to 4s*) Output power – continuous Output power – up to 4s*) BonusPower® time BonusPower® recovery time Overload behavior Short-circuit current**) Output capacitance *) **) ***) nom. max. typ. max. max. max. nom. nom. nom. nom. nom. nom. typ. typ. 36V 36-42V 45V***) 36.0V 10mV 100mV 100mVpp 13.3A 11.4A 20A 17.1A 480W 720W*) 4s 7s min. max. min. max. typ. cont. current 13.5A 15.5A 20A 23A 500µF Guaranteed At clockwise end position of potentiometer ±0.2%, at full load, cold unit At 3x 323-552Vac voltage change Static value, 0A13.3A 20Hz to 20MHz, 50Ohm At 36V, see Fig. 6-1 At 42V, see Fig. 6-1 At 36V, see Fig. 6-1 and Fig. 6-2 At 42V, see Fig. 6-1 and Fig. 6-2 At 36-42V At 36-42V Duration until the output voltage dips, see Fig. 6-2 Overload free time to reset power manager, see Fig. 6-3 See Fig. 6-1 Continuous, load impedance 50mOhm, see Fig. 6-1 Continuous, load impedance 50mOhm, see Fig. 6-1 Short-term (4s), load impedance 50mOhm, see Fig. 6-1 Short-term (4s), load impedance 50mOhm, see Fig. 6-1 Included in the 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 shortterm duration is hardware controlled by an output power manager. This BonusPower® is repeatedly available. Detailed information can be found in chapter 22.1. If the power supply is loaded longer with the BonusPower® than shown in the bonus-time diagram (see Fig. 6-2), the max. output power is automatically reduced to 480W. 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. It is not guaranteed value which can be achieved. The typical value is about 43V. Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 7/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series Fig. 6-1 Output voltage vs. output current, typ. Output Voltage 50V Adjustment Range 42 36 30 B A A 20 B 10 Continuously available Short-term (4s) BonusPower B A Output Current 0 4 0 8 12 20 16 24A Fig. 6-2 Bonus time vs. output power Fig. 6-3 BonusPower® recovery time Bonus Time 5s max. 4 100% min. 3 t 2 Output Voltage 1 0 110 Limitation by Power Manager Power Demand Recovery Time Bonus Power disabled Bonus Time Output Power 120 130 140 t 150 160% The BonusPower® is available as soon as power comes on and after the end of an output short circuit or output overload. Fig. 6-4 BonusPower® after input turn-on Fig. 6-5 BonusPower® after output short Short of Output Input Voltage Output Voltage Output Voltage 150% Output Power 100% Bonus Power Output Power 150% Bonus Power 100% Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 8/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 7. HOLD-UP TIME Hold-up Time 3AC 400V 44ms 36ms 22ms 18ms typ. min. typ. min. Fig. 7-1 Hold-up time vs. input voltage 3AC 480V 44ms 36ms 22ms 18ms At 36V, 6.7A, see Fig. 7-1 At 36V, 6.7A, see Fig. 7-1 At 36V, 13.3A, see Fig. 7-1 At 36V, 13.3A, see Fig. 7-1 Fig. 7-2 Shut-down behavior, definitions Hold-up Time 50ms L1 L2 L3 36V, 6.7A, typ. 40 36V, 6.7A, min. Input Voltage 30 36V, 13.3A, typ. 20 36V, 13.3A, min. 10 Hold-up Time Input Voltage 0 320 360 400 - 5% Output Voltage 440 3x480Vac 8. DC-OK RELAY CONTACT This feature monitors the output voltage, which is produced by the power supply itself. It is independent of a back-fed voltage from a unit connected in parallel to the power supply output. Contact closes Contact opens As soon as the output voltage reaches the adjusted output voltage. As soon as the output voltage dips more than 10% below the adjusted output voltage. Short dips will be extended to a signal length of 250ms. Dips shorter than 1ms will be ignored. As soon as the output voltage exceeds 90% of the adjusted voltage. max. 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A Resistive load min. 1mA at 5Vdc Min. permissible load See dielectric strength table in section 18. Contact re-closes Contact ratings Isolation voltage Fig. 8-1 DC-ok relay contact behavior VOUT = VADJ 10% < 1ms open closed > 1ms 0.9* VADJ 250ms open closed Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 9/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 9. EFFICIENCY AND POWER LOSSES Efficiency Average efficiency*) typ. typ. 3AC 400V 94.8% 94.0% Power losses typ. typ. typ. 8.2W 14.9W 26.3W *) 3AC 480V 94.6% 93.4% 10.0W 16.4W 27.4W At 36V, 13.3A 25% at 3.4A, 25% at 6.7A, 25% at 10A and 25% at 13.3A At 36V, 0A (no load) At 36V, 10A (half load) At 36V, 13.3A (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. Fig. 9-1 Efficiency vs. output current at 36V, typ. Fig. 9-2 Losses vs. output current at 36V, typ. Efficiency Power Losses 96% 95 94 93 92 91 90 89 88 30W 25 20 (a) 3x 400Vac (b) 3x 480Vac (a) 4 6 8 10 0 14A Fig. 9-3 Efficiency vs. input voltage at 36V, 13.3A, typ. 6 8 10 12 14A Fig. 9-4 Losses vs. input voltage at 36V, 13.3A, typ. 95.2 27.5 95.0 27.0 94.8 26.5 94.6 26.0 25.5 Input Voltage 350 4 28W 95.4% 94.2 2 Power Losses Efficiency 94.4 Output Current 0 12 (a) 3x 400Vac (b) 3x 480Vac (b) (a) 5 Output Current 2 15 10 (b) 400 450 Input Voltage 25.0 500 3x550Vac 350 400 450 500 3x550Vac Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 10/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 10. LIFETIME EXPECTANCY AND MTBF Calculated lifetime expectancy*) MTBF**) SN 29500, IEC 61709 MTBF**) MIL HDBK 217F 3AC 400V 250 000h *) 89 000h 144 000h *) 51 000h 1 194 000h 690 000h 389 000h 284 000h 3AC 480V 242 000h *) 86 000h 135 000h *) 48 000h 1 159 000h 670 000h 371 000h 271 000h At 36V, 6.7A and 25°C At 36V, 6.7A and 40°C At 36V, 13.3A and 25°C At 36V, 13.3A and 40°C At 36V, 13.3A and 25°C At 36V, 13.3A and 40°C At 36V, 13.3A and 25°C; Ground Benign GB25 At 36V, 13.3A and 40°C; Ground Benign GB40 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 calculated according to the capacitor’s manufacturer specification. The manufacturer of the electrolytic capacitors only guarantees a maximum life of 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 Mean Time Between Failure, 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 every 100 hours if 10 000 units are installed in the field. However, it can not be determined if the failed unit has been running for 50 000h or only for 100h. *) 11. FUNCTIONAL DIAGRAM Fig. 11-1 Functional diagram L1 L2 L3 Output Voltage Regulator Input Filter Input Rectifier Inrush Limiter Transient Filter Temperature Shutdown PFC Converter Output Power Manager Output OverVoltage Protection Power Converter Output Voltage Monitor Output Filter VOUT + + Overload LED DC-ok LED DC ok Relay DC-ok Contact Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 11/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 12. TERMINALS AND WIRING The terminals are IP20 Finger safe constructed and suitable for field and factory wiring. All terminals Quick-connect spring-clamp terminals Max. 6mm2 Max. 4mm2 Max. AWG10 Max. 2.8mm (including ferrules) Typ. 10mm / 0.4inch Not applicable Not applicable Type Solid wire Stranded wire American Wire Gauge Wire diameter Wire stripping length Screwdriver Recommended tightening torque Instructions: a) Use appropriate copper cables that are designed for minimum operating temperatures of: 60°C for ambient up to 45°C and 75°C for ambient up to 60°C minimum 90°C for ambient up to 70°C minimum. b) Follow national installation codes and installation regulations! c) Ensure that all strands of a stranded wire enter the terminal connection! d) Do not use the unit without PE connection. e) Ferrules are allowed. Daisy chaining: Daisy chaining (jumping from one power supply output to the next) is allowed as long as the average output current through one terminal pin does not exceed 27A. If the current is higher, use a separate distribution terminal block as shown in Fig. 12-2. Fig. 12-1 Daisy chaining of outputs Power Supply + + - - Output Fig. 12-2 Using distribution terminals Power Supply + + - - Output Load + - Power Supply + + - - Output Power Supply + + - - Output Distribution Terminals Load + - max 27A continuous! Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 12/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 13. FRONT SIDE AND USER ELEMENTS Fig. 13-1 Front side A Input Terminals (Quick-connect spring-clamp terminals) L1, L2, L3 Line input ...PE (Protective Earth) input Output Terminals (Quick-connect spring-clamp terminals, two pins per pole) + Positive output – Negative (return) output C Output Voltage Potentiometer Multi turn potentiometer; Open the flap to set the output voltage. Factory set: 36.0V at full output current D DC-OK LED (green) On, when the voltage on the output terminals is >90% of the adjusted output voltage. E Overload LED (red) - On, when the voltage on the output terminals is 2000m (6500ft), see Fig. 15-2 IEC 62103, EN 62477-1, altitudes up to 2000m For altitudes from 2000m to 6000m IEC 62103, EN 62477-1, not conductive 30W/1000m or 5°C/1000m III II 2 Degree of pollution *) Operational temperature is the same as the ambient or surrounding temperature and is defined as the air temperature 2cm below the unit. Curves and figures for operation on only 2 legs of a 3-phase system can be found in chapter 22.4. **) Do not energize while condensation is present. Fig. 15-1 Output current vs. ambient temp. Fig. 15-2 Output current vs. altitude Allowed Output Current at 36V Allowed Output Current at 36V 20A for typ. 4s 16.6 13.3 continuous 10 20A 13.3 6.7 3.3 3.3 Ambient Temperature 0 20 40 60 70°C continuous 10 6.7 0 -25 for typ. 4s 16.6 A A... Tamb < 60°C B... Tamb < 50°C C... Tamb < 40°C 2000 C Altitude 0 0 B 4000 6000m Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 15/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 16. PROTECTION FEATURES Output protection Output over-voltage protection Degree of protection Penetration protection Over-temperature protection Input transient protection Internal input fuse *) Electronically protected against overload, no-load and short-circuits*) typ. 49Vdc In case of an internal power supply defect, a redundant max. 53Vdc circuit limits the maximum output voltage. The output shuts down and automatically attempts to restart. IP 20 EN/IEC 60529 > 3.5mm E.g. screws, small parts yes Output shut-down with automatic restart MOV (Metal Oxide Varistor) Not included In case of a protection event, audible noise may occur. 17. SAFETY FEATURES Input / output separation*) Class of protection Isolation resistance PE resistance Touch current (leakage current) *) SELV PELV I > 500MOhm < 0.1Ohm typ. 0.44mA / 0.94mA typ. 0.62mA / 1.31mA max. 0.54mA / 1.12mA max. 0.78mA / 1.62mA IEC/EN 60950-1 IEC/EN 60204-1, EN 62477-1, IEC 62103, IEC 60364-4-41 PE (Protective Earth) connection required Input to output, 500Vdc At 3x400Vac, 50Hz, TN-,TT-mains / IT-mains At 3x480Vac, 60Hz, TN-,TT-mains / IT-mains At 3x440Vac, 50Hz, TN-,TT-mains / IT-mains At 3x528Vac, 60Hz, TN-,TT-mains / IT-mains double or reinforced insulation Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 16/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 18. DIELECTRIC STRENGTH 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 conducted in the field using the appropriate test equipment which applies the voltage with a slow ramp (2s up and 2s down). Connect all phase terminals together as well as all output poles before conducting the test. When testing, set the cut-off current settings to the value in the table below. Type test 60s A 2500Vac B 3000Vac C 500Vac D 500Vac Factory test 5s 2500Vac 2500Vac 500Vac 500Vac Field test 5s 2000Vac 2000Vac 500Vac 500Vac > 10mA > 10mA > 30mA > 1mA Fig. 18-1 Dielectric strength Input L1 L2 L3 Cut-off current setting B A DC-ok B*) D Output Earth C + - To fulfil the PELV requirements according to EN 60204-1 § 6.4.1, we recommend that either the + pole, the – pole or any other part of the output circuit shall be connected to the protective earth system. This helps to avoid situations in which a load starts unexpectedly or can not be switched 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 recommend connecting DC-OK pins and the output pins together when performing the test. Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 17/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 19. APPROVALS AND FULFILLED STANDARD UL Certificate Listed equipment for category NMTR - Industrial Control Equipment Applicable for US and Canada E-File: E198865 CB Scheme Certificate General safety requirements for Information Technology Equipment (ITE) UL 508 IEC 60950-1 UL 60950-1 UL Certificate Recognized component for category QQGQ - Information Technology Equipment (ITE) Applicable for US and Canada E-File: E137006 CSA Certificate Power Supplies for Hazardous Location Applicable for Canada and US CSA Class: 5318-01 (Canada), 5318-81 (USA) Temperature Code: T3 Groups: A, B, C and D DNV-GL Certificate DNV-GL Type approved product Certificate: 12508-10HH Temperature: Class D Humidity: Class B Vibration: Class C EMC: Class A Enclosure: Class A ABS Design Assessment Certificate ABS (American Bureau of Shipment) assessed product Certificate: 17-HG1599236-PD Class I Div 2 Marine (DNV GL) Marine (ABS) Paint Wetting Impairment Substances Test (or LABS-Test) Tested for Zone 2 and test class C1 according to VDMA 24364-C1-L/W for solvents and water-based paints VDMA 24364 20. REGULATORY COMPLIANCE EU Declaration of Conformity REACH Directive EAC TR Registration The CE mark indicates conformance with the - EMC directive - Low-voltage directive Manufacturer's Statement EU-Directive regarding the Registration, Evaluation, Authorisation and Restriction of Chemicals EAC Certificate EAC EurAsian Conformity - Registration Russia, Kazakhstan and Belarus 8504408200, 8504409000 Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 18/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 21. PHYSICAL DIMENSIONS AND WEIGHT Width Height Depth Weight DIN-Rail Housing material Installation clearances 65mm 2.56’’ 124mm 4.88’’ 127mm 5.0’’ The DIN-rail height must be added to the unit depth to calculate the total required installation depth. 870g / 1.92lb Use 35mm DIN-rails according to EN 60715 or EN 50022 with a height of 7.5 or 15mm. Body: Aluminium alloy Cover: zinc-plated steel See chapter 2 Fig. 20-1 Front view Fig. 20-2 Side view Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 19/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 22. ACCESSORIES 22.1. ZM1.WALL – WALL/PANEL MOUNTING This bracket is used to mount the QT20 power supply on a wall/panel without utilizing a DINRail. The two aluminum brackets and the black plastic slider of the unit have to be detached, so that the steel brackets can be mounted. Fig. 21-1 Wall/panel mounting Fig. 21-2 Mounting Dimensions - Wall mounting bracket Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 20/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 22.2. ZM14.SIDE - SIDE MOUNTING BRACKET This bracket is used to mount the QT20 power supply sideways with or without utilizing a DINRail. The two aluminum brackets and the black plastic slider of the unit have to be detached, so that the steel brackets can be mounted. For sideway DIN-rail mounting, the removed aluminum brackets and the black plastic slider need to be mounted on the steel bracket. Fig. 21-3 Side mounting without DINrail brackets Fig. 21-4 Side mounting with DIN-rail brackets Fig. 21-5 Mounting Dimensions Side mounting bracket Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 21/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 22.3. YR40.482 - REDUNDANCY MODULE The YR40.482 redundancy module is equipped with two input channels (20A each), which are individually decoupled by utilizing MOSFET technology. The output current can go as high as 40A. Using MOSFET instead of diodes reduces the heat generation and the voltage drop between input and output. The YR40.482 does not require an additional auxiliary voltage and is self-powered even in case of a short circuit across the output. Due to the low power losses, the unit is very slender and only requires 46mm width on the DIN-rail. Fig. 21-7 Typical N+1 Redundant configuration for 40A with two dual redundancy modules and four power supplies Fig. 21-6 Typical 1+1 Redundant configuration for 13.3A with one dual redundancy module und two power supplies 40A Load 13.3A Load ++ -- DC36V,13.3A OK QT20.361 L1 L2 L3 PE I L1 L2 L3 PE I I + - Output YR40.482 Redundancy Module Input Input 1 2 + - + - ++ Failure Monitor -- DC36V,13.3A OK ++ QT20.361 QT20.361 L1 L2 L3 PE I I -- DC36V,13.3A OK L1 L2 L3 PE I I I + - Output YR40.482 Redundancy Module Input Input 1 2 + - + - I ++ -- ++ -- DC36V,13.3A OK DC36V,13.3A OK QT20.361 QT20.361 L1 L2 L3 PE L1 L2 L3 PE I I I I I + - Output YR40.482 Redundancy Module Input Input 1 2 + - + - I ++ -- DC36V,13.3A OK Failure Monitor QT20.361 L1 L2 L3 PE I I I L1 L2 L3 PE Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 22/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 23. APPLICATION NOTES 23.1. REPETITIVE PULSE LOADING Typically, a load current is not constant and varies over time. This power supply is designed to support loads with a higher short-term power demand (=BonusPower®). The short-term duration is hardware 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 voltage 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 below 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 continuous output current. If the R.M.S. current is higher, the unit will respond with a thermal shut-down after a period of time. Use the maximum duty cycle curve (Fig. 22-2) to check if the average output current is below the nominal current. d) The duty cycle must be below 0.75. Fig. 22-1 Repetitive pulse loads, definitions Fig. 22-2 Max. duty cycle curve P0 = 10% P0 = 50% P0 = 75% Duty Cycle PPEAK TPEAK T0 0.75 max. 150% 0.6 100% 0.4 P0 = 100% 0.2 P0 0 100 P0 PPEAK T0 TPEAK Example: Base load (W) Pulse load (above 100%) Duration between pulses (s) Pulse duration (s) 110 DutyCycle = T0 = 120 130 PPEAK 140 150% Tpeak Tpeak + T0 Tpeak - (DutyCycle x Tpeak) DutyCycle A load is powered continuously with 240W (= 50% of the rated output load). From time to time a peak power of 720W (= 150% of the rated output 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 PPEAK = 150% and a horizontal line where the vertical line crosses the P0 = 50% curve. Read the max. duty cycle from the duty cycle-axis (= 0.37) - Calculate the required pause (base load) length T0: - Result: The required pause length = 1.7s T0= - Max. repetition rate = pulse +pause length = 2.7s Tpeak - (DutyCycle x Tpeak) DutyCycle = 1s - (0.37 x 1s) 0.37 = 1.7s More examples for pulse load compatibility: PPEAK 720W 720W 600W P0 480W 0W 240W TPEAK 1s 1s 1s T0 >25s >1.3s > 0.75s PPEAK 720W 720W 720W P0 240W 240W 240W TPEAK 0.1s 1s 3s T0 >0.16s >1.6s >4.9s Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 23/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 23.2. PEAK CURRENT CAPABILITY The power supply can deliver peak currents (up to several milliseconds) 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 output current (including the BonusPower®). The same situation applies when starting a capacitive load. The peak current capability also ensures the safe operation of subsequent circuit breakers of load circuits. The load branches are often individually protected with circuit breakers or fuses. In case 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 supplied by the power converter and the built-in large sized output capacitors of the power supply. The capacitors get discharged during such an event, which causes a voltage dip on the output. The following two examples show typical voltage dips: Fig. 22-3 Peak load with 2x the nominal current for 50ms, typ. Fig. 22-4 Peak load with 4x the nominal current for 5ms, typ. 26.6A Peak load (resistive) for 50ms Output voltage dips from 36V to 24.4V. 53.3A Peak load (resistive) for 5ms Output voltage dips from 36V to 24.8V. Please note: The DC-OK relay triggers when the voltage dips more than 10% for longer than 1ms. Peak current voltage dips typ. typ. typ. from 36V to 24.4V from 36V to 28V from 36V to 24.8V At 26.6A for 50ms, resistive load At 53.3A for 2ms, resistive load At 53.3A for 5ms, resistive load 23.3. EXTERNAL INPUT PROTECTION The unit is tested and approved for branch circuits up to 15A (U.S.A.) and 16A (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 regulations 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 minimum value of 6A B- or 3A C-Characteristic breaker should be chosen. Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 24/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 23.4. USING ONLY 2 LEGS OF A 3-PHASE SYSTEM No external protection devices are required to protect against a phase-loss failure. L1 L2 L3 PE This power supply can also be permanently operated on two legs of a 3phase system. However, it is not recommended for this power class since the supplying 3-phase network can become unbalanced. Power Supply AC L1 L2 open The output power must be reduced according to the curves below when operation on only two legs of a 3-phase system. A long-term exceeding of these limits will result in a thermal shut-down of the unit. L3 DC EMC performance, hold-up time, losses and output ripple differ from a three phase operation. Therefore, check suitability of your individual application. Such use is not included in the UL approval. Additional tests might be necessary when the complete system has to be approved according to UL 508 or UL60950-1. Fig. 22-5 Output current vs. ambient temperature 2-phase operation Fig. 22-6 Hold-up time – 2-phase operation Hold-up Time for Use on only Two Legs of a Three Phase System Allowed Output Current at 36V 20A 16.6 13.3 10 6.7 3.3 0 -25 50ms for typ. 4s 36V, 6.7A, typ. 40 continuous B A 40 36V, 13.3A, min. 10 Ambient Temperature 20 36V, 13.3A, typ. 20 A... 2x 460 to 552Vac B... 2x 340 to 460Vac 0 36V, 6.7A, min. 30 Input Voltage 0 60 70°C 320 360 400 440 2x480Vac 23.5. CHARGING OF BATTERIES The power supply can be used to charge lead-acid or maintenance free batteries. (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 41.3V 40.75V 40.2V Battery temperature 10°C 20°C 30°C 40°C b) Use a 20A circuit breaker (or blocking diode) between the power supply and the battery. c) Ensure that the output current of the power supply is below the allowed charging current of the battery. d) Use only matched batteries when putting 12V types in series. e) The return current to the power supply (battery discharge current) is typ. 15mA when the power supply is switched off (except in case a blocking diode is utilized). Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 25/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 23.6. OUTPUT CIRCUIT BREAKERS Standard miniature circuit breakers (MCB’s or UL1077 circuit breakers) are commonly used for AC-supply systems and may also be used on DC branches. MCB’s are designed to protect wires and circuits. If the ampere value and the characteristics of the MCB are adapted to the wire size that is used, the wiring is considered as thermally safe regardless of whether the MCB opens or not. To avoid voltage dips and under-voltage situations in adjacent 36V branches which 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 requires power supplies with high current reserves and large output capacitors. Furthermore, the impedance of the faulty branch must be sufficiently small in order for the current to actually flow. The best current reserve in the power supply does not help if Ohm’s law does not permit current flow. The following table has typical test results showing which B- and C-Characteristic MCBs magnetically trip depending on the wire cross section and wire length. Fig. 22-7 Test circuit Power Supply AC MCB + + Wire length DC S1... Fault simulation switch *) Load S1 Maximal wire length*) for a fast (magnetic) tripping: 0.75mm² 1.0mm² 1.5mm² 2.5mm² 69m 86m 123m 200m C-2A 21m 28m 39m 63m C-3A 9m 13m 18m 29m C-4A B-6A B-10A 11m 1m 16m 1m 24m 1m 33m 1m Don’t forget to consider twice the distance to the load (or cable length) when calculating the total wire length (+ and – wire). 23.7. SERIES OPERATION Power supplies of the same type can be connected in series for higher output voltages. It is possible to connect as many units in series as needed, providing the sum of the output voltage 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. Unit A Avoid return voltage (e.g. from a decelerating motor or battery) which is applied to the output terminals. Unit B AC DC + AC Keep an installation clearance of 15mm (left / right) between two power supplies and avoid installing the power supplies on top of each other. Do not use power supplies in series in mounting orientations other than the standard mounting orientation (input terminals on the bottom of the unit). + - DC + - Load - Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies. Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 26/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 23.8. PARALLEL USE TO INCREASE OUTPUT POWER Unit A Power supplies from the same series (Q-Series) can be paralleled to increase the output power. The output voltage shall be adjusted to the same value (±100mV) or the units can be left with the factory settings. AC DC If more than three units are connected in parallel, a fuse or circuit breaker with a rating of 20A is required on each output. Alternatively, a diode or redundancy module can also be utilized. + + Unit B AC + - Load - Keep an installation clearance of 15mm (left / right) between two power supplies and avoid installing the power supplies on top of each other. Do DC not use power supplies in parallel in mounting orientations other than the standard mounting orientation (input terminals on the bottom of the unit) or in any other condition where a derating of the output current is required (e.g. altitude, above 60°C, …). Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies. 23.9. PARALLEL USE FOR REDUNDANCY Power supplies can be paralleled for redundancy to gain higher system availability. Redundant systems require a certain amount of extra power to support the load in case one power supply unit fails. 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 load 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 13.3A are paralleled to build a 53.2A redundant system. For N+1 redundancy the same restrictions apply as for increasing the output power, see also chapter 22.8. 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 becomes a load for the other power supplies and the output voltage can not be maintained any more. This can be avoided by utilizing redundancy modules, which have decoupling devices (diodes or MOSFETs) included. Further information and wiring configurations can be found in chapter 21.3. Recommendations for building redundant power systems: a) b) c) Use separate input fuses for each power supply. A separate source for each supply when possible increases the reliability of the redundant system. Monitor the individual power supply units. Therefore, use the DC-OK relay contact of the QT20 power supply. It is desirable to set the output voltages of all units to the same value (± 100mV) or leave it at the factory setting. 23.10. INDUCTIVE AND CAPACITIVE LOADS The unit is designed to supply any kind of loads, including capacitive and inductive loads. Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 27/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 23.11. BACK-FEEDING LOADS Loads such as decelerating motors and inductors can feed voltage back to the power supply. This feature is also called return voltage immunity or resistance against Back- E.M.F. (Electro Magnetic Force). This power supply is resistant and does not show malfunctioning when a load feeds 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 48Vdc. The absorbing energy can be calculated according to the built-in output capacitor which is specified in chapter 6. 23.12. USE IN A TIGHTLY SEALED ENCLOSURE When the power supply is installed in a tightly sealed enclosure, the temperature inside the enclosure will be higher than outside. In such situations, the inside temperature defines the ambient temperature 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: Load: Input: Temperature inside enclosure: Temperature outside enclosure: Temperature rise: Rittal Typ IP66 Box PK 9519 100, plastic, 180x180x165mm 36V, 10.7A; (=80%) load is placed outside the box 3x 400Vac 55.7°C (in the middle of the right side of the power supply with a distance of 2cm) 23.8°C 31.9K Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 28/29 QT20.361 36V, 13.3A, THREE PHASE INPUT Q-Series 23.13. MOUNTING ORIENTATIONS Mounting orientations other than all terminals on the bottom require a reduction in continuous output power or a limitation in the maximum allowed ambient temperature. The amount of reduction influences the lifetime expectancy of the power supply. Therefore, two different derating curves for continuous operation can be found below: Curve A1 Curve A2 Recommended output current. Max allowed output current (results in approximately half the lifetime expectancy of A1). Fig. 22-8 Mounting Orientation A (Standard orientation) Output Current 13.3A OUTPUT A1 10 Power Supply 6.7 3.3 INPUT Ambient Temperature 0 10 Fig. 22-9 Mounting Orientation B (Upside down) 20 30 50 40 60°C Output Current 13.3A INPUT 10 A2 Power Supply 6.7 A1 OUTPUT 0 3.3 Ambient Temperature 10 Fig. 22-10 Mounting Orientation C (Table-top mounting) 20 30 50 40 60°C Output Current 13.3A A2 10 A1 6.7 3.3 Ambient Temperature 0 10 50 40 60°C Output Current OUTPUT Power Supply 10 A2 6.7 A1 3.3 Ambient Temperature 0 10 20 30 50 40 60°C Output Current INPUT Power Supply 13.3A OUTPUT Fig. 22-12 Mounting Orientation E (Horizontal ccw) 30 13.3A INPUT Fig. 22-11 Mounting Orientation D (Horizontal cw) 20 10 A2 6.7 A1 3.3 Ambient Temperature 0 10 20 30 40 50 60°C Dez. 2020 / Rev. 2.1 DS-QT20.361-EN All parameters are typical values specified at 36V, 13.3A, 3x 400Vac, 50Hz, symmetrical mains voltages, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. www.pulspower.com Phone +49 89 9278 0 Germany 29/29