Safety Information - Siemens SINAMICS S120 Equipment Manual

Maintenance and servicing
6.4 Replacing components
6.4.2

Safety information

Required safety precautions to be taken before carrying out maintenance and servicing
You must read and observe the "Safety information" chapter in this manual.
When carrying out any kind of work on electrical devices, the following "five safety rules"
must always be observed:
• Disconnect from power supply.
• Protect against reconnection.
• Make sure that the equipment is de-energized.
• Ground and short-circuit.
• Cover or enclose adjacent components that are still live.
The following must be taken into account when the devices are transported:
• Some of the devices are heavy or top heavy.
• 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 cabinet units are operated with high voltages.
All connection work must be carried out when the cabinet is de-energized.
All work on the cabinet must be carried out by trained personnel only.
Work on an open cabinet 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 inside the cabinet up to five minutes after it
has been disconnected due to the DC link capacitors. For this reason, the cabinet should
not be opened until a reasonable period of time has elapsed.
236
DANGER
DANGER
are not lifted or transported properly.
WARNING
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A