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Siemens MICROMASTER 6SE6440-2UD31-8DA1

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6SE6440-2UD31-8DA1

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The Siemens 6SE6440-2UD31-8DA1 is a variable frequency AC drive from the MICROMASTER series. With an output power of 18.5 kW in low overload (LO) mode and 22 kW in high overload (HO) mode, this drive is engineered for precise control of motor functions.

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Technical specifications for 6SE6440-2UD31-8DA1

ManufacturerSiemens
Product TypeAC Drive (Variable Frequency Drive)
Product LineMICROMASTER
Part Number6SE6440-2UD31-8DA1
UPC783087635784
Weight35.31 lbs (16.02 kg)
Rated Output Power (LO/HO)18.5 kW (LO) / 22 kW (HO)
Input Voltage Range380 - 480 V ±10%
Input Frequency Range47 - 63 Hz
Output Frequency Limits0 - 650 Hz (Restricted to 550 Hz in Production)
Rated Output Current (LO/HO)38 A (LO) / 37 A (HO)
Overload Handling140% for 3 sec, 110% for 57 sec (LO) / 150% for 60 sec (HO)
Power Efficiency Rating0.95
Switching Frequency4000 Hz
Operational Efficiency96%
Cooling SystemInternal Cooling Fan
Enclosure Protection LevelIP20 (UL Open Type)
Physical Dimensions (H x W x D)520 mm x 275 mm x 245 mm
Unit Mass16 kg
Input/Output Connections6 Digital Inputs, 3 Relay Outputs, 2 Analog Inputs, 2 Analog Outputs
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The Siemens 6SE6440-2UD31-8DA1 is a robust AC drive belonging to the MICROMASTER series, designed to enhance motor control efficiency. It is rated to deliver power in low overload mode (LO) at 18.5 kW and in high overload mode (HO) at 22 kW. This variable frequency drive operates over a voltage input range of 380 to 480 V with a permissible fluctuation of ±10%, accommodating diverse power systems.

In terms of input frequency, it supports a range between 47 to 63 Hz, making it versatile for different applications. The device can output frequencies from 0 up to 650 Hz, though in production configurations, this is restricted to 550 Hz for performance stability.

For current ratings, it supplies 38 A in the low overload mode while in the high overload mode, it provides 37 A. This drive includes an impressive overload handling capability, allowing for temporary overloads of 140% for 3 seconds or 110% for nearly a minute (57 seconds) in LO mode, and 150% for up to 60 seconds in HO mode.

Efficiency is a key feature with a power efficiency rating of 0.95 and an operational efficiency of 96%. Cooling is achieved through an internal fan, ensuring the unit remains within optimal temperature ranges during operation.

The enclosure is rated at IP20 (UL Open Type), suitable for indoor applications. With physical dimensions of 520 mm in height, 275 mm in width, and 245 mm in depth, the unit has a mass of 16 kg, making it manageable for installation. Input and output configurations include 6 digital inputs, 3 relay outputs, 2 analog inputs, and 2 analog outputs, delivering comprehensive connectivity options for versatile automation applications.