Rockwell Automation SB3000 AC Power Modules - Manual (Page 16)

2-4 SB3000 Power Modules (Rittal)
When the DC bus operating voltage is reached, the connected SA3000/SA3100
Power Modules may be operated. Note that an SB3000 Power Module cannot support
the loading of SA3000/SA3100 Power Modules when the soft-charge resistors are
limiting the bus charging current.
The filtered SB3000 DC output voltage is then fed to the DC bus inputs of the
SA3000/SA3100 Power Module(s). The IGBTs are switched by the Gate Driver
Interface module(s) in the PMI rack. Three LEM sensors provide input current
feedback, which is used for control and overcurrent protection. One LEM sensor is
used to provide DC output current feedback.
Each SA3000/SA3100 Power Module connected to an SB3000 Power
Module-supplied DC bus must have a separate pre-charge resistor and contactor to
limit the current into its capacitor bank. It is the responsibility of the application tasks to
make sure that the SB3000 Power Module is in run before the SA3000/SA3100 Power
Module is put into run.
If the SB3000 Power Module is not in run, the DC bus voltage will not be high enough
to support the full rating of the SA3000/SA3100 Power Module. If the SB3000 Power
Module is shut down due to a fault condition, controlled shutdown of the
SA3000/SA3100 Power Module is the responsibility of the application program
running in the SA3000/SA3100 UDC module.
!
ATTENTION: SA3000/SA3100 Power Modules must be in standby or in
regeneration whenever the SB3000 Power Module’ s pre-charge
contactor opens. The SB3000 Power Module’s soft-charge resistors may
fail if this interlocking restriction is not observed. Failure to observe this
precaution could result in damage to, or destruction of, the equipment.
!
ATTENTION: The SB3000 Power Module must be in run before the
SA3000/SA3100 Power Module is put into run. If the pre-charge
contactor supplying the SB3000 Power Module is not closed, running the
SA3000/SA3100 Power Module will damage the SB3000 pre-charge
resistors. Failure to observe this precaution could result in damage to,
or destruction of, the equipment.