Important Safety Precautions - Siemens SINAMICS G150 Operating Instructions Manual

Electrical installation

4.4 Important safety precautions

4.4 Important safety precautions
The cabinet units are operated with high voltages.
All connection procedures 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 warning notices can result in death, severe 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.
Reforming the DC link capacitors:
The storage period should not exceed two years. If the device is stored for more than two
years, the DC link capacitors of the devices must be reformed during commissioning.
The reforming procedure is described in "Maintenance and servicing".
The user is responsible for ensuring that the motor, converter, and other devices are
installed and connected in accordance with recognized engineering practice in the country
of installation and in compliance with applicable regional regulations. Special attention
should be paid to cable dimensioning, fuses, grounding, shutdown, disconnection, and
overcurrent protection.
If a protective device trips in a current branch, then it is possible that a fault current has
been disconnected. To reduce the risk of fire or an electric shock, the current-conducting
parts and other components in the cabinet unit should be inspected and damaged parts
replaced. When an item of protective gear trips, the cause of the trip must be identified and
rectified.
Note
The standard version of the cabinet units, when the cabinet door is opened, includes touch
protection according to BGV A3 in accordance with EN 50274.
The version with option M60 features additional protective covers that offer a higher level of
touch protection for current-conducting parts when the cabinet door is open.
These protective covers may have to be removed during installation and connection
procedures. Once work has been completed, the protective covers must be properly refitted.
Note
On systems with a grounded phase conductor and a line voltage >600 V AC, line-side
components should be installed to limit overvoltages to overvoltage category II in
accordance with IEC 61800-5-1.
70
WARNING
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A