SIEMENS
9/23
Siemens MD 50.1 · 2015
Motor integrated frequency inverter SINAMICS G110M
0.37 kW to 4 kW
DC link components – braking resistors
9
■
Overview
Fig. 9/20
SINAMICS G braking resistors FSA and FSB
Excess energy in the DC link is dissipated in the braking resis-
tors in regenerative operation.
The braking resistors are intended for use with SINAMICS G110M,
which have an integrated braking chopper, but cannot regenerate
energy to the line supply. For regenerative operation, e.g. the
braking of a rotating mass with high moment of inertia, a braking
resistor must be connected to convert the resulting energy into
heat.
The braking resistors can be mounted on the side of the Control
Unit housing at the bottom. The heat from the braking resistor is
dissipated over the Control Unit housing. Every braking resistor
is equipped with thermal protection. The thermal protection pre-
vents the braking resistor from being thermally overloaded.
All braking resistors are provided as standard with a cable for
connecting to the internal terminals.
■
Technical specifications
■
Characteristic curve
Fig. 9/21
Load diagram for braking resistors
ta = 12 s
t = 120 s
Line voltage
380 … 480 V 3 AC
Braking resistor
Resistor
Ω
350
175
Rated power
P
DB
(Continuous braking power)
kW
0.0075
0.02
Peak power
P
max
(load duration
t
a = 12 s with
period
t
= 120 s)
kW
0.075
0.2
Degree of protection
IP20
IP20
Dimensions
• Width
mm
11
11
• Height
mm
34
34
• Length
mm
84
84
Weight, approx.
kg
0.1
0.1
Suitable for
SINAMICS G110M
(frame size)
FSA
FSB
a
P
P
P
G_D211_EN_00038b
max
DB
© Siemens AG 2015