Voltage Protection Module (Vpm); Description; Safety Instructions For Voltage Protection Modules - Siemens SINAMICS S120 System Manual

Voltage Protection Module (VPM)

6.1

Description

The Voltage Protection Module (VPM) is used to limit the voltage when using synchronous
motors. It is directly connected to the HF Choke Module.
If the line voltage fails at the maximum motor speed or the pulses at the HF Motor Module are
canceled as a result of the power failure, the motor regenerates at a high voltage into the DC link.
The Voltage Protection Module measures the motor voltage. If the rectified motor voltage is >
800 V, an armature short-circuit is triggered. The motor is decelerated by the short-circuit. The
energy remaining in the motor is converted to heat.
A VPM200 Dynamik is used as Voltage Protection Module in a High Frequency Drive (article
number: 6SN1113-1AA00-1KC).
Table 6-1
Type
Signaling contact
Protective conductor connection
Load connecting bolt, input
Load connecting bolt, output
6.2

Safety instructions for Voltage Protection Modules

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.
High Frequency Drive
System Manual, 10/2020, 6SL3097-5AH10-0BP0
VPM 200 Dynamik interface overview
WARNING
6
Quantity
1
4
5
5
81