Siemens SINAMICS G150 Operating Instructions Manual page 628

Maintenance and servicing
11.4 Replacing components
Preparatory steps
● Disconnect the cabinet unit from the power supply.
● Allow unimpeded access to the power block.
● Remove the protective cover.
Removal steps
The removal steps are numbered in accordance with the numbers in the diagram.
1. Remove the busbar (8 screws).
2. Unscrew the connection to the DC link (8 nuts).
3. Remove the retaining screw at the top (1 screw).
4. Remove the retaining screws at the bottom (2 screws).
5. Disconnect the plug-in connections for the fiber-optic cables and signal cables (3 plugs).
6. Remove the connection for the current transformer and associated PE connection (1 plug).
7. Unscrew the two retaining screws for the fan and attach the equipment for assembling the
power block at this position.
You can now remove the power block.
Note
The power block weighs approx. 90 kg!
NOTICE
Damage to the device if signal cables are damaged when removing
Signal cables can be damaged when the power block is removed. This can cause the
device to fail.
• When removing the power block, ensure that you do not damage any signal cables.
Installation steps
To reinstall, perform the above steps in the reverse order.
Note
Specifications for the installation
The tightening torques specified in the table "Tightening torques for screw connections" must
be observed.
Carefully insert the plug-in connections and ensure that they are secure.
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Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A