Replacing Components - Siemens SINAMICS G150 Operating Instructions Manual

11.4

Replacing components

The following must be taken into account when the devices are transported:
• The devices are heavy or generally top heavy. The center of gravity is marked on the
• Due to their weight, the devices must be handled with care by trained personnel.
• Serious injury or even death and substantial material damage can occur if the devices
The devices are operated with high voltages.
All connection work must be carried out when the cabinet is de-energized!
All work on the device must be carried out by trained personnel only. Non-observance of
these warnings can result in death, serious personal injury, or substantial property damage.
Work on an open device must be carried out with extreme caution because external supply
voltages may be present. The power and control terminals may be live even when the
motor is not running.
Dangerously high voltage levels are still present in the device up to five minutes after it has
been disconnected due to the DC link capacitors. For this reason, the unit should not be
opened until a reasonable period of time has elapsed.
Five safety rules
When carrying out any kind of work on electrical devices, the "five safety rules" according to
EN 50110 must always be observed:
1. Disconnect the system
2. Protect against reconnection.
3. Make sure that the equipment has zero potential
4. Ground and short-circuit.
5. Cover or fence off adjacent components that are still live.
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A
WARNING
devices.
are not lifted or transported properly.
WARNING
DANGER
Maintenance and servicing
11.4 Replacing components
537