Braking Module Booksize; Description - Siemens Sinamics S120 Manual

DC link components

8.2 Braking Module Booksize

8.2 Braking Module Booksize
8.2.1

Description

The Braking Module Booksize is always used together with an external braking resistor. It
has the following tasks:
● Specific stop of the drives in the event of a line failure
(e.g. emergency retraction or EMERGENCY OFF category 1).
● Limit the DC link voltage for brief periods of generator operation (e.g. if the regenerative
feedback capability of the Line Module is deactivated or is not adequately dimensioned).
The Braking Module includes the necessary power electronics and control. When the
Braking Module is in operation, the power which is fed back into the DC link is dissipated via
an external braking resistor.
External braking resistors
Braking resistors without thermostatic switch 6SN1113-1AA00-0DA0 (P
6SL3100-1BE31-0AA0 (P
The cable lengths between the Braking Module and braking resistor is limited to a maximum
of 10 m.
The scope of delivery of the braking resistor 6SN1113-1AA00-0DA0 includes a shielded
connection cable (3 m, 3 x 1.5 mm
Rapid discharge
Furthermore, the Braking Module Booksize can used with a braking resistor to quickly
discharge the DC link capacitors The DC link is discharged in a controlled manner via the
braking resistor once the infeed unit has been switched off and the line-up has been
disconnected from the line supply (e.g. via the main switch or line contactor). The function
can be activated via a digital input on the Braking Module. A quick discharge makes sense,
for example, when maintenance tasks are to be performed at the Motor Module and/or motor
installation (reduction of the discharge time).
NOTICE
Damage to the Motor Module or connected motors for a fast discharge
For a fast discharge, the Motor Module or the connected motors can be damaged.
• For a rapid discharge, fully disconnect the drive system from the line supply.
• The motors must be at a standstill.
516
= 1.5 kW) can be operated at the Braking Module Booksize.
N
).
2
= 0.3 kW) and
N
Booksize Power Units
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6