Siemens Introduces Further Liquid-Cooled Modules For Sinamics S120 Low-Voltage Converters

For the first time, the Siemens Drive Technologies Division is offering liquid-cooled Active Interface Modules (AIM) and Active Line Modules (ALM) for the Sinamics S120 low-voltage converter. They cover the voltage range from 500 to 690 V, and have a power of 1700 kW. In addition to the already available air-cooled modules, there is now a liquid-cooled solution, which transfers its heat almost completely to the cooling liquid instead of dissipating it into the surroundings. This means that not only the room climate control, but also the associated unavoidable installation, maintenance and operating costs can be greatly reduced. As a fan is not required, the intrinsic consumption of the modules is also lower.

·    Liquid cooling reduces the need for room climate control

·    Saves energy and operating costs

In contrast to converters with a rectifier input on the line side,

Sinamics S120 converters with Active Line Modules can feed back and so save a great deal of energy. Active Interface Modules combine with the Active Line Modules to form a functional unit and, as a line connection, are essential for converter operation. The Active Interface Module filters out most of the harmonics to keep harmonic distortions very low on the line side. The new modules incorporate a liquid-cooled reactor, a liquid-cooled filter module and the associated connecting elements. This facilitates an efficient cooling design with liquid cooling throughout. Up to four identical modules can be connected in parallel so that up to 5700 kW can be reached on the motor side and up to 6460 kW on the line side. This enables the efficient converters to cover an even wider range of applications, and they are also ideally suited to applications with a high power requirement.

Redundant systems can be easily realizable.

Thanks to their compact design, the liquid-cooled converters are suitable for use in confined spaces, for example in ship propulsion systems, and in harsh environments, such as are encountered in the mining, oil and gas industries.