Question about item
Description
24 volts, 18,8 amps, 451 watts — built-in power supply in a metal case
The MEAN WELL HRP-450-24 is an enclosed built-in power supply with 24 V and 451 W, universal input and active power factor correction. The output is adjustable from 21.6 to 28.8 V. A fan switches on depending on load and temperature.
- Is it right for my project?
- Technical data
- Connection
- Safety
- Scope of delivery
- Frequently asked questions
Is it right for my project?
What this power supply is made for
- 24 V pixel strips, 24 V LED modules and controllers that need 24 V
- Installation in control cabinets, distribution boards and enclosures: 218 × 105 × 41 mm
- Universal input 85–264 V AC / 120–370 V DC — the same unit for mains worldwide
- Exact voltage at the load: output adjustable from 21.6 to 28.8 V
- Remote sense leads (+S/−S) compensate for the voltage drop on the supply lead, DC-OK reports operation to a controller
What it is not for
- 5 V devices — see the 5 volt power supplies
- 12 V devices — see the 12 volt power supplies
- Outdoor use, damp environments or use without an enclosure: it is a built-in power supply for dry rooms, not a weatherproof unit
- Connection by non-specialists: the 230 V mains connection must be made by a qualified electrician
Also required: a mains lead with earth conductor, an installation location with protection against contact and fusing of the outputs.
18.8 AOutput current at 24 V
451 WOutput power
41 mmHeight
> 0.95Power factor at 230 V AC (active PFC)
Protected and monitored
- Overload: current limiting from 105–135 % of rated power, recovers automatically
- Overvoltage: shutdown at 30–34,8 V at the output, restart by switching off and on again
- Overtemperature: shutdown, then automatic restart
- Fan switches on depending on load and temperature
- Connector CN100 additionally provides the DC-OK signal and the remote sense connections +S and −S
Connection
Up and running in four steps
- Work de-energised. Before any installation, disconnect the system from the mains and secure it against being switched back on.
- Mount. The standard mounting orientation is horizontal. Keep ventilation openings clear and keep 10–15 cm away from other heat sources; other mounting orientations and high ambient temperatures require derating per the datasheet. Only use fixing screws of the length stated in the datasheet.
- Connect the output. Loads to −V and +V, distribute the current across all output terminals. Choose the conductor cross-section according to the current per lead — the table is in the installation manual; fuse each feed individually.
- Connect the mains and switch on. Connect L, N and the earth conductor; the earth conductor (FG) must be connected to earth. After switching on, measure the voltage at the load and adjust at the potentiometer if necessary.
Caution: The output voltage must suit your loads. Never set the potentiometer above the value stated by their manufacturer.
Safety
Safety instructions
- Risk of electric shock: installation and mains connection by a qualified electrician only; have faults checked by a specialist. Do not open the case.
- Do not install in places with high humidity or near water.
- Do not operate at high ambient temperature or near sources of fire. Operating temperature −40 to +70 °C; at high temperatures and in other mounting orientations the load must be reduced (derating curve in the datasheet).
- Output current and output power must not exceed the rated values (18.8 A, 451 W).
- The power supply is a component for installation in end equipment; electromagnetic compatibility must be re-verified in the finished installation.
The complete instructions are in the manufacturer's installation manual in the Documents section.
Scope of delivery
- MEAN WELL HRP-450-24 switching power supply
Mains lead, fuses, loads and mounting material are not included.
Documents
The HRP-450 series datasheet and the installation manual in German and English are in the Documents section on this page.
The pictures show a unit of the HRP-450 series and the derating curve from the datasheet.
Frequently asked questions
Can I adjust the output voltage?
Yes, at the potentiometer next to the terminal strip in the range 21.6 to 28.8 V. Only adjust so far that the load receives the voltage stated by its manufacturer.
Is the power supply noisy?
The fan does not run permanently but switches on depending on load and temperature. At low load and in a cool environment it stays off.
Which standards has the unit been tested to?
According to the manufacturer, UL 62368-1 and — tested by TÜV — EN 62368-1. The details are in the datasheet in the Documents section.
Technical data
| Item information | Value |
|---|---|
| Output power: | 451 W |
| Ambient operating temperature: | −40 to +70 °C (derating per datasheet) |
| Output voltage: | 24 V DC (adjustable 21.6–28.8 V) |
| Enclosure: | Metal, enclosed |
| Input voltage: | 85–264 V AC / 120–370 V DC, 47–63 Hz |
| Output current: | 0–18.8 A |
| Mounting: | Built-in, screw mounting |
| Dimensions: | 218 × 105 × 41 mm |
| Weight: | 1.19 kg |
| Ripple & noise: | max. 150 mVp-p |
| Efficiency: | typ. 88 % |
| Power factor: | > 0.95 at 230 V AC (active PFC) |
| Protection functions: | Short circuit, overload, overvoltage, overtemperature |
| Cooling: | Fan, load- and temperature-controlled |
| Signals: | DC-OK, remote sense +S/−S |
| Shipping weight: | 1,50 kg |
Product safety information
Manufacturer information:
MEAN WELL EUROPE N.V.
Langs de Werf 8
NL-1185 XT Amstelveen
Niederlande
info@meanwell.eu
https://www.meanwell.eu
Langs de Werf 8
NL-1185 XT Amstelveen
Niederlande
info@meanwell.eu
https://www.meanwell.eu