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Brand: PULS
PULS QT40.241 24V 40A 960W Three-Phase DIN Rail Power Supply
Description
A 960 W three-phase supply for heavy 24 V loads
The PULS QT40.241 converts a 3-phase 380 to 480 V mains into 24 V at up to 40 A. It belongs to the Q-Series and combines 95.3 % full-load efficiency with a housing only 110 mm wide and 1.5 kg in weight. A 50 % BonusPower reserve (60 A, 1 440 W for up to 4 seconds) helps to start DC motors and capacitive loads, and a 110 A, 10 ms peak current helps to trip faulty branch fuses. Three input fuses are included, so no extra external protection hardware is needed on the supply itself.
The QT40.242 listed in the same datasheet is the extra-long-lifetime version of the same unit; the datasheet quotes about 93 000 h against 69 000 h calculated lifetime at 3AC 400 V, 24 V, 40 A and +40 C.
Technical specification
| Parameter | Specification |
|---|---|
| Order number | QT40.241 (QT40.242 = extra long lifetime version) |
| Output voltage | 24 V nominal, adjustable 24 to 28 V, factory setting 24.1 V plus/minus 0.2 % |
| Output current / power | 40 A and 960 W continuous (34.3 A at 28 V); BonusPower 60 A and 1 440 W for 4 s (51.5 A at 28 V) |
| Ripple and noise | max. 100 mVpp, 20 Hz to 20 MHz; line regulation 10 mV |
| AC input | 3AC 380 to 480 V, -15 % / +10 %; continuous 3 x 323 to 528 Vac, short time to 576 Vac for 5 s; 50 to 60 Hz plus/minus 6 % |
| Input current | 1.58 A at 3 x 400 Vac; 1.3 A at 3 x 480 Vac |
| Power factor / inrush | 0.92 at 400 Vac and 0.93 at 480 Vac; inrush 4.5 A peak, temperature independent |
| Efficiency / losses | 95.3 % and 47.3 W at 3 x 400 Vac; 95.2 % and 48.4 W at 3 x 480 Vac |
| Hold-up time | typ. 25 ms at 400 and 480 Vac |
| DC input | Not allowed – the datasheet states do not operate with a DC input voltage |
| Terminals | Input: screw, 6 mm2 solid / 4 mm2 stranded, 0.8 Nm; output: screw, 16 mm2 solid / 10 mm2 stranded, 2 Nm; DC-OK and shut-down: spring-clamp 1.5 mm2 |
| Control features | Current sharing for parallel use; remote adjustment of output voltage between about 14 and 28 V via the shut-down input; DC-OK relay contact; internal data logging |
| Environment | -25 C to +70 C operating (derating 24 W/C above +60 C); -40 C to +85 C storage; 5 to 95 % r.H.; altitude to 5000 m with derating above 2000 m |
| Dimensions / weight | 110 x 124 x 127 mm (W x H x D); 1 500 g; aluminium alloy body |
| MTBF / lifetime | MTBF (SN 29500) 375 000 h at 3AC 400 V, 24 V, 40 A, +40 C; calculated lifetime 69 000 h under the same conditions |
| Approvals (datasheet chapter 22) | UL 61010-2-201, IEC 61010-2-201, Marine (DNV), SEMI F47, KC; CE declaration of conformity |
Parallel use, remote control and diagnostics
The QT40 can be switched between Single Use and Parallel Use. In parallel mode the datasheet applies a deliberate output-voltage droop (typ. 1 V from 0 to 40 A) so that identical units share the current. The shut-down input at pins 15 and 16 doubles as a remote control for the output voltage: a control voltage (maximum +50 V) applied between pin 15 and the negative output moves the output between typically 14 V and 28 V. PULS advises not changing the voltage by more than 4 V more than 50 times a day to protect lifetime. A red overload LED, a green DC-OK LED and the relay contact give quick diagnosis, and internal data logging supports troubleshooting.
Installation notes
- Mount on 35 mm DIN rail; wall mounting with the ZM2.WALL bracket allows higher shock and vibration levels than DIN-rail mounting.
- Daisy-chaining of outputs is allowed only up to the terminal current limit given in the datasheet; use distribution terminals for higher currents.
- Cable rating: 60 C up to +45 C ambient, 75 C up to +60 C, 90 C up to +70 C; copper only.
- The unit is suitable for TN, TT and IT networks; grounding of one phase is allowed.
- Datasheet chapter 26.4 gives derating curves for operation on only two legs of a 3-phase system.
GCC applications and related items
Three-phase 24 V power is typical for large PLC panels, compressor and pump skids, packaging lines and substation auxiliary supplies on 400 V networks. The 3AC 380 to 480 V range covers both the 400 V grids of Oman and the Gulf and 480 V skid supplies delivered with imported process equipment. The datasheet lists the ZM2.WALL bracket, the UF20.241 buffer unit and the YR80.241 redundancy module as accessories. See the Power Modules category for related supplies.
Selection and installation notes
A DIN-rail power supply is selected from the load current plus a margin of about twenty to thirty percent for start-up and ageing. Protect the input with the fuse or breaker the maker names, leave the clearances above and below for cooling, keep the output wiring short and check the output voltage under load. Where redundancy matters, use a decoupling module and two supplies rather than one larger unit.
Information needed for a quotation
Send the full model code, the quantity, the delivery location in Oman or the GCC, the intended use and any accessories needed, so that the complete package can be quoted together.
Documents and supply information
The manufacturer data sheet is attached to this page and should be read together with the project specification and the site risk assessment before a purchase is confirmed. Ratings, standards and dimensions are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.
Frequently asked questions
Can the QT40.241 be fed from a 480 V network?
Yes. The rated input is 3AC 380 to 480 V, and 480 V supply is covered by the 3 x 323 to 528 Vac continuous range.
What is the difference between QT40.241 and QT40.242?
The QT40.242 is the extra long lifetime version of the same unit; the datasheet quotes a longer calculated lifetime for it.
Can I connect two QT40.241 units in parallel?
Yes, the unit has a Parallel Use mode with current sharing, selected by a switch on the front.
Can it run from DC?
No. The datasheet states that this power supply must not be operated with a DC input voltage.
Is Seven Star LLC the manufacturer?
No. Seven Star LLC is an independent supplier in Muscat; send us the order code and quantity for a quotation.
Datasheets & Documents
- Datasheet PULS QT40.241 datasheet (Aug. 2024, Rev. 3.1) Download
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About brand
PULS is a Munich-based manufacturer of industrial DIN rail power supplies, founded in 1980 by Bernhard Erdl. The company develops and produces 24 V single-phase and three-phase power supplies, DC/DC converters, buffer and redundancy modules and DC-UPS units for control cabinets.
Seven Star LLC is an independent supplier in Muscat. We list PULS power supplies and supplementary modules for PLC cabinets, pumping stations, compressor packages and utility panels in Oman and the GCC.
PULS product series
DIMENSION power supplies on this site include the CP10.241 (24 V, 10 A), the CS10.241 with auto-select input, the QS20.241 (24 V, 20 A) and the three-phase CT5.241, QT40.241 and semi-regulated XT40.241 for 40 A. Higher-featured models offer PowerBoost or BonusPower reserves and a DC-OK signal.
Supplementary units include the MLY10.241 dual diode redundancy module, the YR40.242 MOSFET redundancy module for 40 A, the UF20.241 capacitor buffer module that bridges supply interruptions of about 200 ms, and the UB10.241 DC-UPS control unit used with batteries.
Where PULS power supplies are used
24 V supply for PLCs, I/O, sensors and actuators in machine and process control panels, redundant supplies for critical systems, and buffered supplies for controllers that must ride through short mains dips.
Ordering PULS products: what we need
Send the full order code, such as QS20.241, together with the input voltage and phases, output current, ambient temperature and any approvals required, such as UL, marine, ATEX, IECEx or Class I Div 2, which apply only to selected models.
Browse PULS products by category: Power Modules.
Related products
Frequently Asked Questions
Can the QT40.241 be fed from a 480 V network?
Yes. The rated input is 3AC 380 to 480 V, and 480 V supply is covered by the 3 x 323 to 528 Vac continuous range.
What is the difference between QT40.241 and QT40.242?
The QT40.242 is the extra long lifetime version of the same unit; the datasheet quotes a longer calculated lifetime for it.
Can I connect two QT40.241 units in parallel?
Yes, the unit has a Parallel Use mode with current sharing, selected by a switch on the front.
Can it run from DC?
No. The datasheet states that this power supply must not be operated with a DC input voltage.
Is Seven Star LLC the manufacturer?
No. Seven Star LLC is an independent supplier in Muscat; send us the order code and quantity for a quotation.
Reviews
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