6SL3210-1KE26-0AF1 – General title: Motor inlet valve (line choke) for SINAMICS G120 drive, input class C, 3AC 380-480V, 7.5 kW (10 hp), with built-in EMC filter.

Brand: Siemens
Product family: SINAMICS G120 – Siemens’ popular and versatile series of variable frequency drives (VFDs) for controlling AC motors.

Ordering code breakdown

The code 6SL3210-1PE21-4UL0 is interpreted as follows:

6SL3: Identifier prefix for Siemens automation systems (here SINAMICS).

210: Indicates the standard Power Module.

1PE21: The main part of the code that determines the technical specifications (voltage, power, input class).

4UL0: Version/specific features (e.g. filter type, degree of protection, certifications).

Key and technical specifications: 6SL3210-1KE26-0AF1

Unit type: Motor input valve (Line Reactor / DC Choke)

This is a line reactor that is placed at the DC input of the drive link. This component is an optional but very important component to improve the performance and protection of the Power Module of the SINAMICS G120 drive.

Input class: Input Class C

This class means “DC power supply”. This means that the choke is designed for when the input source to the drive is rectified and of DC type (e.g. from a rectifier or DC power supply unit). It is not designed for direct connection to a three-phase AC network.

Input voltage range: 3AC 380-480V

Suitable for use in common industrial voltage systems in this voltage range (typically 400V).

Rated power: 7.5kW (about 10HP)

This choke is specifically designed to mate with the 7.5kW G120 Power Module. It is not recommended to use a choke with a lower or higher rated power.

Built-in EMC filter:

This model is equipped with a built-in electromagnetic interference (EMC) filter. This filter helps reduce harmonics and noise generated by the drive, ensuring that the system complies with EMC standards (typically Class C3 for industrial environments).

Main functions and benefits of this choke (Line Reactor):

Current harmonic reduction: Smooths the input current and reduces the total harmonic distortion (THDi), which is beneficial for the health of the power grid and generators.

Voltage spike protection: By limiting the rate of increase of the current (di/dt), it acts as a buffer against sudden voltage spikes in the grid and protects the drive power module.

Power factor improvement: Helps improve the input power factor of the drive.

Noise and electromagnetic interference reduction: With the built-in filter, it minimizes noise emission to the grid.

Drive life extension: Extends the life of the drive by reducing electrical stress on the DC link capacitors and other components.

Important installation and application notes:

Mandatory pairing: This choke is designed only for use with the SINAMICS G120 series Power Module with a power of 7.5 kW/10 hp and a voltage range of 380-480V.

Input source type: It must be connected to a DC source (directly or via a rectifier). Connecting it directly to three-phase AC power will cause damage.

Installation environment: Like other electrical components, it must be installed in a dry, cool, dust-free and vibration-free environment.

Follow the instructions: Installation and wiring must be carried out in strict accordance with the installation manual for SINAMICS G120 and this choke.

Typical applications:

This choke is installed in systems where the quality of the input power is poor or where there is a need for harmonic reduction and additional drive protection. Such as:

Industrial pumps and fans

Conveyor systems

Manufacturing machinery

Factories with dedicated generators

Summary:

6SL3210-1PE21-4UL0 is a line choke (inlet valve) with built-in EMC filter for the SINAMICS G120 drive with a power of 7.5 kW. This part is a vital accessory for improving power quality, protecting the drive against network fluctuations and reducing electromagnetic interference in industrial systems. Before purchasing and installing, make sure that your power supply is DC type and is fully compatible with the Power Module of your drive.

Final advice: For more technical details, exact connections and safety information, please refer to the SINAMICS G120 main catalog or the Technical Documentation of this specific code on the Siemens website.