L37, Dc Interface Incl. Pre-Charging Input Circuit For The Relevant Dc Link Capacitance; General Information; Dc Interface Incl. Pre-Charging For Booksize Cabinet Kits; Important Safety Precautions - Siemens SINAMICS S120 Manual

Options

8.25 L37, DC interface incl. pre-charging input circuit for the relevant DC link capacitance

8.25 L37, DC interface incl. pre-charging input circuit for the relevant DC
link capacitance
8.25.1

General information

Availability of option
This option is available for the following S120 Cabinet Modules:
● Booksize Cabinet Kits
● Chassis format Motor Modules
Description
If the Motor Module is to be disconnected or reconnected to the DC link of a drive line-up
while the other Motor Modules and Line Modules remain in operation, this can be
accomplished via the DC interface.
8.25.2

DC interface incl. pre-charging for Booksize Cabinet Kits

8.25.2.1

Important safety precautions

The Motor Module can be serviced after it has been disconnected from the DC busbar via
the DC interface and after the capacitor discharge time has elapsed. However, the following
safety precautions must be observed:
Once the DC busbar and the Motor Module in booksize format have been disconnected by
means of the fuse switch disconnector (-Q7), the following voltages continue to be present
in the adjacent Motor Modules in booksize format in the Cabinet Module:
• Up to 800 V on the DC busbar (protected against accidental contact)
• Line voltage (3 AC 380 ... 480 V) via the auxiliary power supply system or 2 AC 230 V
• Up to 230 V AC via the auxiliary power supply system or via direct infeed for SITOP and
• 24 V DC on the auxiliary power supply system (electronics power supply)
• On the motor connection (e.g. regenerative voltage due to residual speed)
414
DANGER
downstream of the transformers for the fan supply
fan supply
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A