Connecting The Braking Resistor - Siemens SINAMICS G130 Operating Instructions Manual

Connection

4.3 Connecting the braking resistor

4.3 Connecting the braking resistor
The Braking Module must only be connected when the Power Module has been
disconnected from the power supply and the DC link capacitors have been discharged.
CAUTION
The cables for the braking resistor must be routed to prevent short-circuiting and ground
faults in accordance with IEC 61800-5-2:2007, Table D.1.
This can be accomplished, for example, by:
• Eliminating the risk of mechanical damage to the cables
• Using cables with double insulation
• Maintaining adequate clearance, using spacers, for example
• Routing the cables in separate cable ducts or tubes
CAUTION
The length of the connecting cables between the Braking Module and external braking
resistor must not exceed 100 m.
Recommended connection cross-sections:
● For 25/125 kW: 35 mm²
● For 50/250 kW: 50 mm²
Thermostatic switch
A thermostatic switch is installed to protect the braking resistor against overload. Its floating
contacts must be integrated in the fault chain on the line side.
Table 4- 5
Terminal
T1
T2
Max. connectable cross-section: 2.5 mm²
32
WARNING
Thermostatic switch connection
Description of function
Thermostatic switch connection
Thermostatic switch connection
Technical specifications
Voltage: 250 V AC
Load current: 1 A max.
Braking Module / braking resistor
Operating Instructions, 03/2012, A5E00331454A