TWERD PS300-WT 10kW, on-grid, 3-F

TWERD PS300-WT 10kW (on-grid, 3-phase)
A three-phase, transformerless inverter designed for operation with small wind or water turbines equipped with a synchronous generator with permanent magnets. In the on-grid version, it is used to feed energy into the 3×400 V 50 Hz grid, controls the generator load, and has anti-runaway protections and resistor braking circuits for the generator.

Manufacturer Information
The device is manufactured by TWERD Energy Electronics Plant Sp. z o.o. (TWERD) - a Polish manufacturer specializing in renewable energy converters, design, production, and service of photovoltaic and wind inverters. Technical and service documentation is available in the company's user manual.

Electrical and Technical Parameters

• Rated AC power: 10 kW
• WT input (AC) - generator operating range: 3×60…425 VAC, nominal generator voltage 3×400 VAC
• Max. input current from generator (IGEN-MAX): 20 A (10 kW version)
• Output voltage (grid): 3×400 V, 50 Hz
• Nominal output current (IOUT): 14.5 A
• Max. efficiency: 97 %
• THD of output current: < 3 %
• Switching frequency (carrier): 16 kHz
• Built-in relays for controlling braking resistors: capacity 30 A AC1 (internal relays controlling resistors for 3–10 kW versions)
• Power consumption in standby: 20 W

Mechanical and Mounting Parameters

• Dimensions (W × H × D): 426 mm × 490 mm × 214 mm (data from Fig. 3.1 for on-grid inverters 3–10 kW)
• Weight (with mounting frame): 33 kg
• Protection rating: IP65 (suitable for outdoor installation)
• Mounting position: vertical, with connections facing down (max. tilt ±15°)
• Cooling / mounting clearances: maintain a minimum of 20 cm of free space from the top and bottom and 10 cm from the sides; use additional ventilation in a closed enclosure