SIEMENS
7/163
Siemens D 21.4 · 2017
SINAMICS S120 drive system
Chassis format
Liquid-cooled units in chassis format
7
■
Overview
The SINAMICS S120 liquid-cooled drive units are specifically
designed to address the requirements relating to liquid cooling;
they are characterized by their high power density and optimized
footprint. Liquid cooling dissipates heat much more efficiently
than air cooling systems. As a result, liquid-cooled units are much
more compact than air-cooled units with the same power rating.
Since the heat losses generated by the electronic components
are almost completely dissipated by the liquid coolant, only very
small cooling fans are required. This means that the devices are
quiet in operation. Due to their compact dimensions and almost
negligible cooling air requirement, liquid-cooled units are the
preferred solution wherever installation space is restricted and/or
the ambient operating conditions are rough.
Control cabinets with liquid cooling are easy to implement as
sealed units with degrees of protection of IP55.
The product portfolio includes the following liquid-cooled
SINAMICS S120 built-in units:
•
Power Modules
•
Basic Line Modules
•
Active Line Modules
•
Active Interface Modules
•
Motor Modules
The associated system components such as line reactors, motor
reactors, dv/dt filters plus VPL and sine-wave filters are air-
cooled. Active Interface Modules are available in air-cooled and
liquid-cooled versions.
Highlights of the liquid-cooled units
•
Up to a 60 % smaller footprint than air-cooled drive converters
•
All main components such as power semiconductors, DC link
capacitors and balancing resistors are cooled by the cooling
circuit
•
Only a low flow rate is required
•
Uniform pressure drop of 0.7 bar
•
Automatic protective functions
•
Nickel-plated busbars
•
Low noise
•
Compatible with all components and functions and tools of the
SINAMICS system family
•
The power rating can be extended by connecting units in
parallel
•
No equipment fans
Cabinet units in liquid-cooled version
Liquid-cooled SINAMICS S120 drive units are also available
as cabinet units, including cooling system.
For further
information, please refer to the Catalog D 21.3.
© Siemens AG 2017