Increased peak current in the N3 modification in the HRP‑150/300/600 series from MEAN WELL


For a number of applications where the load has large inrush currents, it is very important to choose the right power source with this feature in mind. The power supply selected according to the rated power of the load, as a rule, does not have time to start such a load and the power supply goes into protection. As an example of such a load, these are electric motors of various types. Therefore, for such cases it is necessary to use a power supply with a very large power reserve, which is a suboptimal choice. Therefore, for such applications, MEAN WELL has developed a special modification with increased peak power based on a series of high-reliability HRP power supplies.

The HRP series power supplies of the N3 modification are AC/DC converters in a housing design designed for embedding, with an output voltage of the standard series – 12, 24, 36, 48V DC, rated power of 150, 300 and 600W – HRP-150N3, HRP-300N3 and HRP-600N3 series. A distinctive feature of the N3 modification is the increased output power – up to 300-350% of the nominal for use with loads with large starting currents. The second distinctive feature, as in general for the HRP series, is high reliability – this is the main quality that the manufacturer highlights in these series.

Внешний вид блоков питания серий HRP-300N3Appearance of HRP-300N3 series power supplies

HRP series power supplies of modification N3 have a built-in power Factor Corrector (Power Factor Corrector, PFC), a built-in output current limiting circuit (constant current limiting circuit) with a current limitation level of 330-380% (depending on the series) for 5 seconds, the main types of protection: short circuit, overload, overvoltage, overheating. The HRP-150N3 series power supplies are cooled by natural ventilation, and the HRP-300N3 and HRP-600N3 units use forced ventilation due to an integrated cooling fan with intelligent control. All HRP series power supplies of the N3 modification have a warranty period of 5 years.

The calculation of the permissible output power for the HRP power supply of the N3 modification is carried out from the following ratios:

Расчет допустимой выходной мощностиCalculation of permissible output power

For each HRP-N3 series, a graph of the dependence of the peak power duration on its magnitude at different input voltage levels is determined. For example, for HRP-300N3, this dependence has the form:

Длительность импульса пиковой мощности в зависимости от ее величиныThe duration of the peak power pulse, depending on its magnitude

Calculation examples for different series are given in the Specification, which allows for an adequate power calculation and the selection of a suitable model from the HRP series of modification N3, depending on the load parameters.

The HRP series power supplies of the N3 modification are designed primarily for use with loads with large starting currents – electric motors and electromechanical devices. They can be used as general–purpose AC/DC converters in various fields of application - industrial machines and robots, industrial automation devices, mechanical and electrical equipment, diagnostic devices and laboratory devices, telecommunications equipment and others.

Main technical characteristics and features of HRP series power supplies of modification N3

  • Extended input voltage range: 85...264V (AC),120...370V (DC).
  • Rated output power (by series): 150, 300, 600W.
  • Standard output voltages: 12, 24, 36, 48V.
  • Built-in Power Factor Corrector.
  • Built-in output current limiting circuit (constant current limiting circuit) at the level of 330-380% of the rated current for 5 seconds.
  • Output voltage monitoring function (remote sense function).
  • Protection: short circuit, overload, overvoltage, overheating.
  • Extended operating temperature range: -40°C – for a load with rated power, from -10°From up to +70°C – for all types of load.
  • Cooling due to natural ventilation (HRP-150N3), forced ventilation (HRP-300N3, HRP-600N3).
  • LED operation indicator.
  • The warranty period is 5 years.

More detailed technical specifications are provided in the Specifications for power supplies of the HRP series modification N3, and for questions related to the selection and use of products of MEAN WELL, please contact the email address .