Siemens SINAMICS S120 Combi Manual page 20

Fundamental safety instructions
1.1 General safety instructions
Electric shock due to equipment damage
Improper handling may cause damage to equipment. For damaged devices, hazardous
voltages can be present at the enclosure or at exposed components; if touched, this can
result in death or severe injury.
• Ensure compliance with the limit values specified in the technical data during transport,
• Do not use any damaged devices.
Electric shock due to unconnected cable shield
Hazardous touch voltages can occur through capacitive cross-coupling due to unconnected
cable shields.
• As a minimum, connect cable shields and the conductors of power cables that are not
Electric shock if there is no ground connection
For missing or incorrectly implemented protective conductor connection for devices with
protection class I, high voltages can be present at open, exposed parts, which when
touched, can result in death or severe injury.
• Ground the device in compliance with the applicable regulations.
Arcing when a plug connection is opened during operation
Opening a plug connection when a system is operation can result in arcing that may cause
serious injury or death.
• Only open plug connections when the equipment is in a voltage-free state, unless it has
Electric shock due to residual charges in power components
Because of the capacitors, a hazardous voltage is present for up to 5 minutes after the
power supply has been switched off. Contact with live parts can result in death or serious
injury.
• Wait for 5 minutes before you check that the unit really is in a no-voltage condition and
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WARNING
storage and operation.
WARNING
used (e.g. brake cores) at one end at the grounded housing potential.
WARNING
WARNING
been explicitly stated that they can be opened in operation.
WARNING
start work.
SINAMICS S120 Combi
Manual, 11/2017, 6SL3097-4AV00-0BP7