Replacing The Powercard - Siemens SINAMICS GM150 Operating Instructions & Installation Instructions

Installing a diode module
1. Install the intact diode module in the reverse order.
2. When tightening the screws, make sure that you use the appropriate torque (Page 187) that
Final checks
1. Ensure that all the screws have been tightened with the correct torques.
2. Make sure that all the connections are secure.
9.5.6

Replacing the PowerCard

The motor-side inverter consists of one or two parallel-connected power units depending on its
configuration. In the power unit, the power semiconductor modules (IGBT and neutral diodes),
gating boards, and balancing resistors are arranged on PowerCards.
NOTICE
Malfunction caused by replacing individual IGBT blocks
For a number of IGBTs connected in series N=2, each phase comprises 5 PowerCards. The
IGBT modules are connected in series to distribute the voltage. It is necessary to replace
these IGBT modules connected in series in pairs. If you do not carefully take this into
consideration, then the IGBT modules may malfunction.
● Replace the defective modules as associated pair. Return the pair for repair. A pair of IGBT
Note
Simple measuring instruments are not capable of determining whether the IGBT or the gating
board of a module is defective. As a consequence, always replace the complete module.
Required tools
● 10 mm open-ended wrench or socket wrench
● 13 mm open-ended wrench or socket wrench
● Torque wrench
SINAMICS GM150 6SL3810-2LN31-8AA2
Operating Instructions Rev.201910281332 EXAMPLE
is permissible for each screw type.
modules that belong together is provided in the corresponding spare parts packages (for
example Ax1+Ax2 or Ax3+Ax4).
Maintenance
9.5 Repair
193