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DU/dt filters

DU/dt filters are used for filtering voltage increase rate and voltage peak value in motor input. With Trafox DU/dt filters, lengths up to 100–300 m can be reached, facilitating even the most demanding installations. The extensive standard selection of different current ranges ensures an optimal filter choice.

The features, dimensions, structure and mounting options of the filters can be tailored according to the customer’s objectives and needs.

Additional information: 

DUDT FILTERS DU/dt Filters Brochure, ENG (pdf)

Technical data

Operating voltage range: 3 x 200–690 Vac ±10%
Motor frequency: – 0–70 Hz without derating
– 70–320 Hz with derating
Maximum switching frequency: 4 kHz
Typical voltage spike: 50% of DC link voltage
Voltage loss: < 5V at nominal current
Ambient temperature: -20–40°C in operation
Storage temperature: -20–70°C
Humidity: <95 % RH, no condensation
Overload capacity: 1.5 x rated current for 1 min, once per 60 min
Insulation class: H 180°C
Flammability of materials: UL 94
Standard: EN 61558-2-20
Protection class: IP00
Regulatory compliance: LVD 2006/95/EC
Certifications: CE, UL/ur, ROHS