Components At The Dc Link; Braking Units - Siemens SINAMICS G130 Engineering Manual

SINAMICS G130
Engineering Information

4.9 Components at the DC link

4.9.1

Braking units

SINAMICS G130 converter Chassis units have no regenerative feedback capability. Braking units are therefore
required for applications in which regenerative energy is produced occasionally and for brief periods, e.g. when the
drive brakes (emergency stop). The braking units consist of a Braking Module and an externally installed braking
resistor, which is connected to the Braking Module and converts generated braking energy into heat.
Braking Modules with a continuous braking power of 25 kW (P
available for SINAMICS G130 converter Chassis units. The table below lists the braking powers which match the
output power ratings of individual converters. The Braking Modules contain the power electronics and associated
control circuitry. They are designed for being mounted in the power blocks of the G130 Power Modules and are
cooled by the air discharged from the Power Modules. They are connected to the DC link of the Power Module and
operate completely autonomously in terms of the supply voltage drawn from the DC link and in terms of the closed-
loop control. In order to achieve a higher braking power, it is possible to operate more than one Braking Module in
parallel on converters constructed of multiple power blocks. 2 Braking Modules can be used on converters of frame
size HX, and 3 Braking Modules on converters of frame size JX. A separate braking resistor is always assigned to
each Braking Module.
If braking units are operated at ambient temperatures of > 40 °C and at installation altitudes of > 2000 m, the derating
factors relating to output current and output power listed for the Power Modules also apply.
A thermal contact, which can be incorporated into the alarm and shutdown sequence of the converter, is installed in
the braking resistor as a monitoring mechanism.
The maximum permissible cable length between the Braking Module and braking resistor is 100 m.
SINAMICS G130
Chassis units
Rated power
380 V – 480 V 3AC
110 kW - 132 kW
160 kW - 560 kW
500 V – 600 V 3AC
110 kW - 560 kW
660 V – 690 V 3AC
75 kW - 132 kW
160 kW - 800 kW
Braking Modules and braking resistors available for SINAMICS G130 Chassis units. The power values are valid for the
factory-set response thresholds
+ 24 V
Fault output
0 V
Inhibit input
0 V
Connection to the
DC link
Connection of Braking Module and braking resistor in SINAMICS G130 Chassis units
SINAMICS Engineering Manual – November 2015
296/528
Ó Siemens AG
Matching Braking Modules
Rated power Power
(continuous
braking power)
P P
DB 40
25 kW 50 kW
50 kW 100 kW
50 kW 100 kW
25 kW 50 kW
50 kW 100 kW
Braking Module
21.6
Fault
21.5
21.4
21.3
Inhibit
21.2
21.1
X21
DCPA
DCNA
power 100 kW) and 50 kW (P
20
Power Peak power
P
20
100 kW 125 kW
200 kW 250 kW
200 kW 250 kW
100 kW 125 kW
200 kW 250 kW
Braking resistor
T1
R1
R2
J
D
T2
power 200 kW) are
20
Braking
resistor
R
P
B
15
4.4 Ω ±7.5 %
2.2 Ω ±7.5 %
3.4 Ω ±7.5 %
9.8 Ω ±7.5 %
4.9 Ω ±7.5 %
Max.
current
189 A
378 A
306 A
127 A
255 A