L61/L62, L64/L65, Braking Units; General Information - Siemens SINAMICS S120 Equipment Manual

8.27

L61/L62, L64/L65, braking units

8.27.1

General information

Availability of option
This option is available for the following S120 Cabinet Modules:
● Basic Line Module
● Smart Line Module
● Active Line Module
● Motor Module in chassis format
Description
Braking units may be required for drives that support regenerative operating conditions but
have no other facility for feeding energy back into the supply system.
The braking unit comprises two components:
● A Braking Module that is installed in the Power Module
● A braking resistor to be mounted externally (degree of protection IP20)
The braking unit functions as an autonomous unit, and does not require an external power
supply.
The Braking Modules are installed in the air outlet channel of the Basic Line Module, Smart
Line Module, Active Line Module, or Motor Module.
During the braking process, the kinetic energy is converted into heat in the externally
mounted braking resistor.
A maximum cable length of 100 mm is permissible between the Braking Module and the
braking resistor. This allows the braking resistor to be mounted externally so that heat losses
can be released outside the converter enclosure. The braking resistor is connected directly
to the Braking Module terminals.
The application threshold of the Braking Module can be adjusted to the plant-side
requirements using a threshold switch.
Note
Higher braking powers are available on request.
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
8.27 L61/L62, L64/L65, braking units
Options
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