Safety Instructions For Voltage Protection Modules - Siemens Sinamics S120 Manual

10.2.2

Safety instructions for Voltage Protection Modules

Danger to life if the fundamental safety instructions and remaining risks are not carefully
observed
If the fundamental safety instructions and remaining risks in Chapter 1 (Page 25) are not
observed, accidents involving severe injuries or death may occur.
• Adhere to the fundamental safety instructions.
• When assessing the risk, take into account residual risks.
Danger to life through electric shock due to the residual charge of the DC link capacitors
Due to the DC link capacitors of the converter, a hazardous voltage is present in the DC
link for up to 30 minutes after the power supply has been switched off.
Contact with live parts can result in death or serious injury.
• Avoid contact with the Voltage Protection Module as long as it is under voltage.
Danger to life through electric shock due to high speed of the motor while the VPM is being
ramped up
If the motor is operated with a speed higher than the field weakening threshold speed while
the Voltage Protection Module is ramping up (see the technical data), the protection
function of the VPM is inactive during this phase. As a consequence, high voltages can be
injected into the DC link.
Contact with live parts can result in death or serious injury.
• Only operate the motor below the field weakening threshold speed while the VPM is
Danger to life through electric shock due to the insulation voltage being exceeded
An excessively high voltage will damage the insulation resulting in death or severe injury.
• Do not connect any motors whose electromotive force (EMF) exceeds the permissible
• Route the cables so that they are protected to rule out any damage.
Booksize Power Units
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6
WARNING
DANGER
WARNING
ramping up.
WARNING
value at the highest speed used.
Motor-side power components
10.2 Voltage Protection Module VPM
599