Safety Instructions For Voltage Protection Modules - Siemens SINAMICS S120 System Manual

Voltage Protection Module (VPM)

5.2 Safety instructions for Voltage Protection Modules

5.2 Safety instructions for Voltage Protection Modules
Danger to life if the fundamental safety instructions and remaining risks are not carefully
observed
The non-observance of the fundamental safety instructions and residual risks stated in
Chapter 1 can result in accidents with severe injuries or death.
• Adhere to the fundamental safety instructions.
• When assessing the risk, take into account remaining risks.
Danger to life due to electric shock caused by residual charge of the DC-link capacitors
Due to the DC link capacitors of the inverter, a hazardous voltage is present in the DC link
for up to 30 minutes after the power supply has been switched off.
Touching live components results in death or severe injury.
• Do not touch the Voltage Protection Module as long as it is under voltage (live).
Danger of death due to electric shock for an excessively high motor speed 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.
Touching live components results in death or severe injury.
• Only operate the motor below the field weakening threshold speed while the VPM is
Danger to life due to electric shock if the insulation voltage is 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.
74
WARNING
DANGER
WARNING
ramping up.
WARNING
value at the highest speed used.
System Manual, (SH2), 04/2015, 6SL3097-4AH10-0BP3
High Frequency Drive