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Application notes

PS3031-2440-0000

31

Version: 1.0

4

Application notes

4.1

Repeated pulse load

Typically a load current is not constant and varies with time. This power supply is designed to support loads
with a higher short-term power demand (extra power). The short-term duration is hardware-controlled by an
output power manager and is available repeatedly. If the extra power load lasts longer than the hardware
controller allows, the output voltage drops. Extra power is available again after the extra power recovery time
has elapsed (see 

Output [

}

 12]

 chapter).

To avoid this, the following conditions must be met:

• The power requirement of the pulse must be less than 150% of the rated output power.

• The duration of the pulse power must be shorter than the permitted extra power time. (see 

Output

power section [

}

 12]

)

• The average (RMS) output current must be below the specified continuous output current. 

If the effective current is higher, the device responds with a thermal shutdown after a certain time. The
maximum duty cycle curve (Fig. 

Repeated pulse loads, definitions

) can be used to check whether the

average output current is below the rated current.

• The duty cycle must be less than 0.75.

Fig. 21: Repeated pulse loads, definitions; Max. duty cycle curve

Key

P

0

Base load (W)

P

PEAK

Pulse load (over 100%)

T

0

Duration between pulses (s)

T

PEAK

Pulse duration (s)

Calculation:

Duty cycle

 = T

PEAK

 / (T

PEAK 

+ T

0

)

T

0

 = (T

PEAK

 - (DutyCycle x T

PEAK

)) / DutyCycle

Summary of Contents for PS3031-2440-0000

Page 1: ...Documentation EN PS3031 2440 0000 Power supply 24 V DC 40 A 3 phase 2020 11 12 Version 1 0 ...

Page 2: ......

Page 3: ...side and operating elements 23 3 14 EMC 25 3 15 Environment 26 3 16 Protective functions 27 3 17 Safety features 27 3 18 Dielectric strength 28 3 19 Declaration of conformity and approvals 29 3 20 Dimensions and weight 30 4 Application notes 31 4 1 Repeated pulse load 31 4 2 Peak current capability 33 4 3 External input protection 34 4 4 Operation on two phases of a 3 phase system 35 4 5 Output ci...

Page 4: ...Table of contents PS3031 2440 0000 4 Version 1 0 ...

Page 5: ... a short term peak current The output voltage can be switched off by means of the shutdown contact A DC OK LED an overload LED and a potential free relay contact monitor the status of the output voltage The power supply is part of the PS3000 family and has a width of 110 mm Overview of technical data Overview of technical data PS3031 2440 0000 Output voltage DC 24 V nominal Adjustment range 24 28 ...

Page 6: ...r are registered trademarks of and licensed by Beckhoff Automation GmbH Other designations used in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owners Patent Pending The EtherCAT Technology is covered including but not limited to the following patent applications and patents EP1590927 EP1789857 EP1456722 EP2137893 DE1020151057...

Page 7: ...s device is designed for installation in a housing and is intended for general professional use for example in industrial control systems or office communication and measuring equipment Do not use this power supply in installations where a malfunction could cause serious injury or danger to human life Exclusion of liability All the components are supplied in particular hardware and software config...

Page 8: ...or immediately after it has been switched off Hot sur faces can cause burns Further notes on installation requirements This device contains no serviceable parts Triggering of an internal fuse indicates an internal defect In the event of damage or malfunction during installation or operation switch off the device im mediately and return it to the factory for inspection Mount the device on a DIN rai...

Page 9: ...he nominal voltage range may be provided with tolerances e g AC 380 480 V 15 The calculated total range then indicates the working range of the device Example DC 12 V refers to a 12 V battery regardless of whether it is fully charged 13 7 Vdc or discharged 10 Vdc 400 Vac A value followed by the unit Vac or Vdc is an instantaneous value that does not contain any additional tolerances 50 Hz vs 60 Hz...

Page 10: ...input 3AC 400 V 3AC 480 V Input current Typ 1 65 A 1 35 A At 24 V 40 A per phase see Fig Input current over output current power factor over output current Power factor Typ 0 88 0 90 At 24 V 40 A see Fig Input current over output cur rent power factor over output current Start up delay Typ 500 ms 600 ms See Fig Input voltage range switch on behavior defini tions Rise time Typ 35 ms 35 ms At 24 V 4...

Page 11: ...limits the input inrush current to a very low value after power up and after short interruptions of the input voltage 3AC 400 V 3AC 480 V Input inrush current Max 6 A peak 6 A peak temperature independent Typ 4 5 A peak 4 5 A peak Inrush energy Max 1 5 A s 1 5 A s Start up delay Typ 500 ms 600 ms The charge current of the interference suppression capacitors during the first few microseconds after ...

Page 12: ...overcurrent capability typ 10 ms Dynamic overcurrent capability typ 25 ms Output current Typ 110 A up to 25 ms output voltage remains above 20 V see Fig Dynamic overcurrent ca pacity typ 10 ms Dynamic overcurrent capability typ 25 ms This peak current is available once per second for further peak current measurements see chapter Peak current capability 33 Output power continuous Nom 960 W At 24 28...

Page 13: ...utput current typ in Single Use mode output voltage over output current typ in Parallel Use mode Fig 5 Dynamic overcurrent capability typ 10 ms Dynamic overcurrent capability typ 25 ms Fig 6 Bonus time over output power Extra power recovery time Extra power is available as soon as the power is turned on and after an output short circuit or output overload ...

Page 14: ...Technical data mounting wiring PS3031 2440 0000 14 Version 1 0 Fig 7 Extra power after switching on extra power after short circuit or overload ...

Page 15: ... Fig Hold up time over input voltage Typ 25 ms 25 ms At 24 V 40 A see Fig Hold up time over input voltage Min 20 ms 20 ms At 24 V 40 A see Fig Hold up time over input voltage 1 Characteristic curves and figures for operation on only two external conductors of a 3 phase system can be found in chapter Operation on two phases of a 3 phase system 35 Fig 8 Hold up time over input voltage switch off beh...

Page 16: ...in when the output voltage exceeds 90 of the set voltage Contact load capacity Maximum 60 Vdc 0 3 A 30 Vdc 1 A 30 Vac 0 5 A ohmic load Minimum permissible load 1 mA at 5 Vdc Insulation voltage See the table in chapter Dielectric strength 28 Fig 9 Behavior of the DC OK relay contact Nature and source of the danger The DC OK function requires the output voltage to reach the rated set level after pow...

Page 17: ... permitted Information regarding the use of the shutdown input Please note the following Option C see diagram below requires current reduction capability of the voltage source Do not use a blocking diode The shutdown function does not include any safety functionality Fig 10 Activation of the shutdown input 3 8 Output voltage control The shutdown input can also be used to remotely adjust the output...

Page 18: ... 9 8 W At 24 V 0 A no load Typ 24 1 W 25 0 W At 24 V 20 A half load Typ 47 3 W 48 4 W At 24 V 40 A full load 1 The average efficiency is based on assumptions for a typical application with a power supply load of 25 of the nominal load for 25 of the time 50 of the nominal load for 25 of the time 75 of the nominal load for 25 of the time and 100 of the nominal load during the remaining time Fig 12 E...

Page 19: ...em NOTE Operation on two phases of a 3 phase system Please note the information in chapter Operation on two phases of a 3 phase system 35 2AC 400 V 2AC 480 V Efficiency Typ 94 4 94 7 At 24 V 40 A Losses Typ 56 9 53 7 At 24 V 40 A full load Fig 14 Efficiency over output current at 24 V losses over output current at 24 V ...

Page 20: ... in electrolytic capacitors The lifetime expectancy is stated in operating hours and is calculated according to the specifications of the capacitor manufacturer The manufacturer of the electrolytic capacitors only guarantees a maximum service life of up to 15 years 131 400 h Any number exceeding this value represents a calculated theoretical service life which can be used to compare devices 2 MTBF...

Page 21: ...Recommended tightening torque 1 Nm 9 lb in 2 3 Nm 20 5 lb in Not applicable e solid wire f stranded wire a with ferrule Wiring instructions Use suitable copper cables that are designed for at least the following operating temperatures 60 C for ambient temperatures up to 45 C and 75 C for ambient temperatures up to 60 C and 90 C for ambient temperatures up to 70 C Observe the national installation ...

Page 22: ...Technical data mounting wiring PS3031 2440 0000 22 Version 1 0 3 12 Functional wiring diagram Fig 16 Functional wiring diagram ...

Page 23: ...y contact is synchronized with the DC OK LED See chapter on DC OK relay contact 16 for more information Potentiometer for the output voltage Designation D Description Potentiometer cover Open the flap to adjust the output voltage Factory setting 24 1 V at rated output current Single Use mode Overload LED Designation E Description LED red On when the voltage at the output terminals is 90 of the set...

Page 24: ...Parallel Use Single Use mode Set the jumper to Parallel Use mode if power supplies are connected in parallel to increase the output power In order to distribute the load current between the individual power supplies Parallel Use mode regulates the output voltage so that the idle voltage is approx 4 higher than at nominal load See also chapter Parallel Use for power increase 38 A missing jumper cor...

Page 25: ... output lines IEC CISPR 16 1 2 IEC CISPR 16 2 1 5 dB higher than the AV limit value curve for the DC power connection according to EN 61000 6 31 Interfering radiation EN 55011 EN 55022 Class B Harmonic input current EN 61000 3 2 Requirements for Class A devices met Voltage fluctuations flicker EN 61000 3 3 Requirements met 2 This device complies with FCC Part 15 Operation is subject to the followi...

Page 26: ...r or the ambient temperature see Fig Output current over installation altitude IEC 62103 EN 50178 overvoltage category II Derating installation altitude 60 W 1000 m or 5 C 1000 m 2000 m see Fig Output current over installation altitude Overvoltage category III According to IEC 62103 50178 installation altitudes up to 2000 m II Installation altitudes between 2000 m and 6000 m Degree of pollution 2 ...

Page 27: ... MOV metal oxide varis tor Input fuse included Not user replaceable 1 In the event of a protection event audible noises may occur 3 17 Safety features Safety features Input output isolation double or reinforced isolation SELV IEC EN 60950 1 PELV IEC EN 60204 1 EN 62477 1 IEC 62103 IEC 60364 4 41 Protection class I PE protective conductor connection required Insulation resistance 5 MOhm between inp...

Page 28: ...ing the input to DC OK make sure that the maximum voltage between DC OK and the output is not exceeded column D We recommend connecting the DC OK pins and the output pins when performing the test A B C D Type test 60 s 2500 Vac 3000 Vac 500 Vac 500 Vac Component test 5 s 2500 Vac 2500 Vac 500 Vac 500 Vac Field test 5 s 2000 Vac 2000 Vac 500 Vac 500 Vac Setting the cut off current 10 mA 10 mA 40 mA...

Page 29: ...Technical data mounting wiring PS3031 2440 0000 29 Version 1 0 3 19 Declaration of conformity and approvals EU declaration of conformity UL Certificate UL508 Applicable for US and Canada ...

Page 30: ...ion depth required Weight 1500 g DIN rail Use 35 mm DIN rails according to EN 60715 or EN 50022 with a height of 7 5 or 15 mm The height of the DIN rail must be added to the depth of the device 127 mm to calculate the total installation depth required Housing material Housing Aluminum alloy Cover Steel Installation clearances See chapter on Safety instructions and installation requirements 8 Fig 2...

Page 31: ...met The power requirement of the pulse must be less than 150 of the rated output power The duration of the pulse power must be shorter than the permitted extra power time see Output power section 12 The average RMS output current must be below the specified continuous output current If the effective current is higher the device responds with a thermal shutdown after a certain time The maximum duty...

Page 32: ... line at PPEAK 150 and a horizontal line where the vertical line crosses the curve P0 50 Read the maximum duty cycle from the duty cycle axis 0 37 Calculate the required pause length T0 base load Result Required pause length 1 7 s Max repetition rate pulse pause length 2 7 s T0 TPEAK DutyCycle x TPEAK DutyCycle 1 s 0 37 x 1 s 0 37 1 7 s Further examples of pulse load tolerance PPEAK P0 TPEAK T0 14...

Page 33: ...th circuit breakers or fuses In the event of a short circuit or overload in a circuit the fuse or circuit breaker needs a certain amount of overcurrent to open in time This prevents a voltage drop in adjacent circuits The additional current peak current is supplied by the power converter and the built in large size output capacitors of the power supply The capacitors are discharged during such an ...

Page 34: ...quired if the supply line has a protection that is higher than this Also check the local regulations and requirements Local regulations may apply in some countries If an external fuse is required or used minimum requirements must be taken into account to avoid false tripping of the circuit breaker A circuit breaker with a minimum value of 6 A with B or C characteristic should be used ...

Page 35: ...eriods leads to thermal shutdown of the system Operation below 340 Vac with an output current of more than 30 A can also cause a thermal shutdown When switching on there may be some start up attempts until the output power is fully available EMI behavior hold up time losses and output ripple are different from three phase operation Therefore check the suitability for your individual application Th...

Page 36: ... This requires power supplies with high reserve current and large output capacitors In addition the impedance of the faulty branch must be sufficiently small for the current to actually flow The following table contains typical test results that show which circuit breakers with B and C characteristics trip magnetically depending on the wire cross section and the wire length Fig 26 Test circuit Max...

Page 37: ...cking diode 4 7 Series connection Power supplies of the same type can be connected in series to increase the output voltages As many devices can be connected in series as necessary as long as the sum of the output voltages does not exceed 150 Vdc Voltages with a potential higher than 60 Vdc are no longer regarded as safety extra low voltage and can be dangerous Such voltages must be protected with...

Page 38: ...etting is also the Single Use mode If more than three devices are connected in parallel a fuse or circuit breaker with a rated current of 50 A or 63 A is required at each output Alternatively a diode can be used Restrictions Maintain an installation distance of 15 mm left right between two power supplies Do not install the power supplies above each other In Parallel Use mode power supplies should ...

Page 39: ...r of the housing and there are no other heat generating objects in the housing The load is placed outside the housing The temperature sensor inside the housing is placed at the center of the right side of the power supply at a distance of 2 cm The following measurement results can be used as a reference to estimate the temperature rise within the housing Housing size 254x180x165 mm Rittal housing ...

Page 40: ...9 Installation position A standard installation position Fig 30 Installation position B upside down Fig 31 Installation position C table mounting Fig 32 Installation position D horizontal clockwise Fig 33 Installation position E horizontal counterclockwise ...

Page 41: ...ing PS3031 2440 0000 ZS5301 0002 ZS5301 0002 Bracket for wall mounting This bracket is used to mount the devices to a wall or panel without using a DIN rail Fig 34 ZS5301 0002 isometric view 5 2 Documentation issue status Version Comment 1 0 First release Corrections 0 1 Preliminary documentation for PS3031 2440 0000 ...

Page 42: ...ckhoff components there Beckhoff Support Support offers you comprehensive technical assistance helping you not only with the application of individual Beckhoff products but also with other wide ranging services support design programming and commissioning of complex automation systems and extensive training program for Beckhoff system components Hotline 49 5246 963 157 Fax 49 5246 963 9157 e mail ...

Page 43: ......

Page 44: ...Beckhoff Automation GmbH Co KG Hülshorstweg 20 33415 Verl Germany Phone 49 5246 9630 info beckhoff com www beckhoff com More Information www beckhoff com ps3031 2440 0000 ...

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