RSG WNG Series Product Image

WNG Series Open Frame Power Supplies

Custom designed fan-cooled open-frame 5kW/ 10kW power supplies for pitch control systems in wind turbines.

Supplier: RSG

Technology type: Open / U-Frame Power Supplies

The basic construction of this switch-mode power supply consists of a bridge rectifier and a push-pull converter. It works as a constant current source with voltage limitation and supplies an inverter and a buffer capacitor. It is designed for a permanent output of up to 5kW. The WNG series can produce 10kW peak output power for 10 seconds. When the maximum current is reached, the output power is limited in accordance with a characteristic curve controlled by the processor.

Due to the installation environment in the hub of wind turbines, the WNG series was designed, tested and certified for high mechanical demands.

Each pitch control system in a wind turbine contains three power supplies as the WNG.

Range features

A high level overview of what this range offers

  • Input: 3-phase 360-440VAC, Imax <150A peak (@ 400VAC)
  • Output: 90VDC, 55A (100A for 10s), Inom = 3x 20A
  • Isolation voltage I/O: 3kVAC
  • Input filter: acc. EN55022 Level A
  • Continuous short circuit protection
  • Maintenance-free

What's in this range?

All the variants in the range and a comparison of what they offer


Input voltage

Output current

Output voltage

Output power


360 ~ 440VAC

55 (100 for 10s)ADC

75 ~ 120VDC

5kW (10 for 10s)

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