S1 Threshold Switch - Siemens SINAMICS S120 Equipment Manual
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Also See for SINAMICS S120:
- Function manual (1094 pages) ,
- Diagnostic manual (947 pages) ,
- Manual (848 pages)
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6.2.1.8
S1 Threshold switch
The response threshold at which the Braking Module is activated and the DC-link voltage
generated during braking are specified in the following table.
Electric shock when operating the threshold switch
Operating the threshold switch when a voltage is present can cause death or serious injury.
• Only operate the threshold switch when the Power Module is switched off and the DC
Table 6- 11
Response thresholds of the Braking Modules
Response threshold
Switch position
673 V
774 V
Note
The threshold switches of the Braking Modules are in the following positions when installed:
• Position "1" is up
• Position "2" is down
AC Drive
Manual, 06/2019, 6SL3097-5AL00-0BP1
WARNING
link capacitors are discharged.
Comment
1
774 V is the default factory setting. For line supply voltages of between 3-ph.
380 V and 400 V AC, the response threshold can be set to 673 V to reduce
2
the voltage stress on the motor and Power Module. This does, however,
reduce the possible braking power with the square of the voltage (673/774)² =
0.75.
The maximum possible braking power is, therefore, 75%.
DC link components
6.2 Chassis
177
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