Siemens Micromaster 440 6SE6440-2UE17-5CA1 Frequency Inverter

Product Overview

The Siemens 6SE6440-2UE17-5CA1 (6SE64402UE175CA1) is a high-performance vector control frequency inverter from the MICROMASTER 440 family, specifically engineered for the 500V to 600V AC power class. This "Unfiltered" version is a versatile powerhouse designed for demanding industrial applications requiring sophisticated speed and torque control. Whether utilized for constant torque loads (0.75 kW) like conveyors and mixers, or squared torque loads (1.5 kW) like centrifugal pumps and fans, the 6SE6440-2UE17-5CA1 delivers exceptional dynamic response. Its robust overload capability—reaching 200% for short bursts—ensures localized process stability even during high-inertia startups, making it a critical asset for minimizing mechanical stress and extending motor service life.

Technical Configuration

The 6SE6440-2UE17-5CA1 features a sophisticated control architecture designed for maximum application flexibility.

• Vector Control Capabilities: Supports high-performance Sensorless Vector Control (SVC) and closed-loop vector control, providing precise torque management even at low frequencies.

• Dual Power Rating: Optimized for both Constant Torque (CT) and Variable/Squared Torque (VT) profiles, allowing a single drive to be adapted for different mechanical load characteristics.

• Braking Performance: Equipped with an integrated braking chopper for effective regenerative energy dissipation during rapid deceleration cycles.

• Modular Interface: The unit is supplied without an AOP or BOP (Advanced/Basic Operator Panel), providing a cost-effective solution for systems where commissioning is performed via PC-link or centralized fieldbus communication.

• Compact Footprint: The Size C frame design (IP20) is optimized for side-by-side mounting in control cabinets, featuring internal air cooling to maintain thermal stability up to 50 deg C.

Technical Specifications

Technical FAQs

How do I program the 6SE6440-2UE17-5CA1 if it comes without a keypad?

The drive can be commissioned using a PC with the Siemens STARTER software and a serial link/USB connection kit. Alternatively, you can temporarily plug in a Basic Operator Panel (BOP) from another Micromaster 440 unit to set the parameters.

Does this inverter require an external EMC filter?

As this is the "WITHOUT FILTER" version, it is intended for use on industrial power grids where integrated filtering is not required or where central plant filtering is already in place. If used in residential or sensitive environments, an external Class A or B line filter must be installed.

Can this drive be used for 50 Hz and 60 Hz networks?

Yes, the 6SE6440-2UE17-5CA1 is designed for a global input frequency range of 47 Hz to 63 Hz, making it compatible with both European and North American power standards.

Engineering & Installation Guide

• Input Protection: To protect the inverter's power bridge against transients and short circuits, use semi-conductor fuses (SIRET) or appropriately rated circuit breakers. Ensure the 500V-600V supply is correctly grounded to prevent common-mode voltage stress on the motor insulation.

• Thermal Clearances: For effective heat dissipation, maintain a minimum clearance of 100 mm above and below the unit. Avoid mounting the inverter directly above other heat-generating components like braking resistors or line reactors.

• Braking Resistor Sizing: When utilizing the internal braking chopper for rapid stops, ensure the external braking resistor has a minimum resistance value as specified in the Siemens MM440 manual. Using a resistor with too low a resistance can lead to catastrophic failure of the internal chopper transistor.