Siemens 6SN1113-1AA00-1JA1 SIMODRIVE VPM 120, VOLTAGE PROTECTION MODULE, 120 A METRIC THREAD. The VPM can be operated in conjunction with SINAMICS S120, and with SIMOTICS M-1FE motors and with 2SP1 motor spindles.
The VPM must be installed between the motor and drive system (maximum distance from drive system 1.5 m (4.92 ft)). 6FX8 shielded motor supply cables must be used in combination with the VPM.
Siemens 6SN1113-1AA00-1JA1 VPM 120 Voltage Protection Module
Siemens 6SN11131AA001JA1 VPM 120 Voltage Protection Module
SIMODRIVE VPM 120 Voltage Protection Module
The voltage protection function is deployed on SIMOTICS M-1FE motors and on the synchronous version of 2SP1 motor spindles with an EMF of Û > 820 V to 2000 V (Urms 570 V to 1400 V) in order to limit the DC link voltage in the drive system in the event of a fault.
If the line voltage fails with the motor operating at maximum speed, or if the drive system pulses are suppressed as a result of a line voltage failure, the synchronous motor feeds energy at high voltage back into the DC link.
The VPM detects that the DC link voltage is too high (DC > 820 V) and shorts the three motor feeder cables in order to brake the motor. The power remaining in the motor is converted to heat via the short circuit in the VPM and motor.