6SL3210-1PE27-5AL0 Siemens Power Module

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Description of 6SL3210-1PE27-5AL0

The Siemens 6SL3210-1PE21-1AL0 is a power module from the SINAMICS family of drives. It is a 3-phase AC input device designed for controlling motors with a rated output power of up to 4.00 kW. The module features an integrated internal air cooling system and complies with multiple international standards, including UL, cUL, and CE. It is suitable for standard drive applications with vector or V/f control and offers distinct overload capabilities for Low Overload (LO) and High Overload (HO) operating modes.The Siemens 6SL3210-1PE27-5AL0 is a high-power member of the SINAMICS family of drive modules. It operates from a 3-phase AC input and provides a rated output power of up to 37.00 kW for standard motor control. Designed for industrial applications, it features dual overload capabilities for Low Overload (LO) and High Overload (HO) operating modes. The module includes an integrated Class A filter and screw-type terminals for robust connections, complying with major international standards such as UL, cUL, and CE.

Parameter

Input (Line Side)
Number of phases: 3 AC
Line voltage: 380 ... 480 V ± 10 %
Line frequency: 47 ... 63 Hz
Rated current (LO): 70.00 A
Rated current (HO): 62.00 A

Output (Motor End)
Number of phases: 3 AC
Rated voltage: 400V IEC / 480V NEC
Rated power (LO): 37.00 kW / 50.00 hp
Rated power (HO): 30.00 kW / 40.00 hp
Rated current (LO): 75.00 A
Rated current (HO): 60.00 A
Max. output current: 120.00 A
Pulse frequency: 4 kHz
Output frequency (Vector control): 0 ... 200 Hz
Output frequency (V/f control): 0 ... 550 Hz

FAQ

What is the purpose of the DC link connection, and why is the cable length limited?
A: The DC link connection allows for the direct attachment of an external braking module or braking resistor. When a motor decelerates rapidly, it regenerates energy back to the drive, raising the DC link voltage. The external resistor dissipates this excess energy as heat. The 10 m cable length limit is critical to minimize parasitic inductance, which could cause voltage overshoots and potentially damage the drive's internal components or the connected resistor.

Why does this higher-power module have significantly longer permissible motor cable lengths than the FSB frame size modules?
A: Larger, higher-power modules typically feature more robust output stages and internal filtering designed to mitigate the effects of cable capacitance and reflected voltage waves. The FSD frame size allows for 200 m shielded and 300 m unshielded cables, compared to the much shorter limits on smaller FSB modules. This enables the drive to be installed further from the motor in larger facilities.

This module has a much higher displacement factor (cos φ = 0.99) and efficiency than smaller models. Why?
A: Higher-power drives inherently operate with a better fundamental power factor at their rated load. The displacement factor (cos φ) is primarily determined by the line-side rectifier, and its contribution to the total power factor (λ) becomes more dominant and closer to unity at higher power levels. The efficiency is also higher (0.98 vs. 0.97) because the proportion of fixed losses (like control electronics and fan power) relative to total throughput is smaller in a higher-power drive.