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PULS
PULS

Power supply 1-phase, 24 V dc Dimension Q series

  • Output current 40 A
  • Up to 94.6% efficiency
  • High short-circuit currents
  • Remote function
  • Protective filters

Product description

Pulse Dimension Q is a series power supply with very high performance. The efficiency is high over a wide load range, which results in reduced power consumption and longer life regardless of load current. An average efficiency is 93.8% with a peak value of 94.6%. The power loss at idle is only 12 W.

The bonus power provides 50% extra reserve with retained 24 V dc (60 A) which is an advantage when connected loads have high starting currents and to bridge temporary current peaks. The bonus power is limited to 4 seconds to avoid constant overloading of the power supply and wiring. In addition to the bonus effect leave the unit a very high short-circuit current (for a number of milliseconds) that helps to secondary fuses. If the overload remains after 4 sec. Ports end in the so called, hiccup mode. When the output voltage drops below 21 V dc shut the unit by the end of the 18's. And then make a new start attempt. If the overload / short connection is gone restarts the power supply automatically. If the overload / short circuit persists, the unit output current of approx. 2 sec and then again turn off.

Heavy transient ensure operation also in very störrik electrical environment and also has QS40.244 active inrush current protection, which means a very low starting current, even if the unit has been in operation for a longer time. Especially useful for redundant / parallel-connected systems.

Simple diagnostics via DC-OK relay that falls on the output voltage deviates more than 10% from the set value, a green LED indicates DC-OK, the red LED indicates overload.
The unit can also be remote controlled for on / off function, three different connection options available. Can be used instead of expensive DC contactors when you need to break up the 24 VDC side. Note. remote control function has no safety circuit and therefore should not be used in the security context.
Active PFC reduces power consumption and harmonics close to zero. Moreover, the current distribution in the phases were much more even at the voltage asymmetry.

 

Output characteristics

Remote function

Bonus power

The power supply has bonus power that enables high power extraction with retained 24 V dc for 4 seconds, which is a major advantage when connected loads have high starting currents, for example. engines. How often you can use the bonus effect depends on the application. With the below chart and formula estimated the repeat time available for each individual application. The bonus power is available as soon as the power supply is started and after a short circuit

 

Bonus power

Work cycle

Bonus effect diagram power supply QT20.241

Duty cycle diagram power supply QT20.241

Po

Nominal load current

Ppeak

Peak current

To

Time between bonus effect

Tpeak

Peak current time

Work cycle

Tpeak/(Tpeak+To)

To=

Tpeak-(duty cycle)*Tpeak)/work cycle

Ex. Peak current (Ppeak) 50 A = 125%. Peak time is 3 seconds. Nominal load current (Po) is 30 A. 30 A = 75% of In. According to the diagram, the working cycle about 0.45. To = 3 - (0.45 * 3) / 0.45 = 3.6. Maximum repeat time of bonus power is 3.6 seconds.

 

 

Indicators

Overload
LED

DC-OK
LED

DC-OK
contact

Normal operation

Off

On

Closed

During bonus poweroutput

Off

On

Closed

Overload (Hick-up)

Flashing

Off

Open

Short circuit

Flashing

Off

Open

Over temperature

Flashing

Off

Open

Remote shutdown

Flashing

Off

Open

No input voltage

Off

Off

Open

Ex. Peak current (Ppeak) 50 A = 125%. Peak time is 3 seconds. Nominal load current (Po) is 30 A. 30 A = 75% of In. According to the diagram, the working cycle about 0.45. To = 3 - (0.45 * 3) / 0.45 = 3.6. Maximum repeat time of bonus power is 3.6 seconds.

 

Articles

Variant

QS40.241
POWER SUPPLY 24VDC 40A

Specifications

Input voltage range Wide-range
Number of phases 1
Input voltage AC 100-240 V
Input voltage ac min 90 V AC
Input voltage ac max 264 V AC
Inrush current at 120 V ac typical 17 A
Inrush current at 230 V ac typical 11 A
Power Factor at 120 V AC, full load. Typical 0,99
Power Factor at 230 V AC, full load. Typical 0,99
Supply Frequency 50-60 Hz +-6%
Power Consumption At 120 V AC 8,6 A
Power Consumption At 230 V AC 4,5 A
Type Power Supply AC-DC
Output voltage 24 V DC
Output voltage min 24 V DC
Output voltage max 28 V DC
Output Current 40 A
Effect 960 W
Power Reduction Of 60 To 70 ° C 24 W/°C
Ripple. max 100 mV pp
Temperature Range Without Derating From -25 °C
Temperature Range Without Derating To 60 °C
Efficiency At 120 V AC, full load. Typical 93,6 %
Efficiency At 230 V AC. Typical 93,9 %
Efficiency At 230 V AC, full load. Typical 94,6 %
Lifetime at 120 V ac, full load and +40 ° C 64000 h
Lifetime at 230 V ac, full load and +40 ° C 84000 h
MTBF (IEC 61709) 230 V AC, Maximum Load, 40 ° C 300000 h
Width 125 mm
Height 124 mm
Depth 127 mm
Weight 1,9 kg
Clamp type Spring-clamp
Series Dimension Q
Approvals ABS, ATEX, CB, CE, CSA, EAC, GL, IECEx, UL
DC relay output Yes
Material Protection Aluminium
Hold-up time at 120 V AC, full load. Typical. 27 ms
Hold-up time at 230 V AC, full load. Typical. 27 ms
IP Class IP20
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