6
05.01
6.7 DC link options
6-187
© Siemens AG 2008 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
Before performing any commissioning or service work, check that the DC link is
safely disconnected from the power supply.
Table 6-16 Charge/discharge times, discharge voltage
Capacitor
module
The charge time
depends on the
total DC link
capacitance
The discharge time depends on the total DC
link capacitance to 60 V of the DC link voltage
at 750 V DC
2.8 mF/4.1 mF As for the
power modules
approx. 30 min
20 mF approx. 2 min approx. 30 min
If there is a pulsed resistor in the system, in order to reduce the discharge time
after opening terminal 48, the DC link can be quickly discharged via terminals
X221:19 and 50 (jumpers). In this case, the electronics power supply must be
implemented using a 3–phase line supply connection; this is not disconnected
while discharging.
Note
Discharge through a pulsed resistor is not possible for a 5 kW UI!
!
Warning
The pulsed resistor modules can only convert a certain amount of energy into
heat (refer to Table 6-20). The energy available to be converted depends on
the voltage.
A monitoring function protects the resistance against overload. If this responds,
then no additional energy is converted into heat in the resistor.
Caution
In order to avoid damage to the infeed circuit of the NE modules, when
controlling/energizing terminal X221 T.19/50, it should be ensured that terminal
48 of the NE module is deenergized (the module is electrically isolated from the
line supply).
The feedback signal contacts of the main contactor of the NE module must be
evaluated to check whether the contactor has actually dropped out (X161
terminal 111, terminal 113 and terminal 213).
6.7.2 Overvoltage limiter module
The overvoltage limiter module limits overvoltages at the line supply input to
acceptable values. These overvoltages can occur, e.g. due to switching opera-
tions at inductive loads and line supply matching transformers.
The overvoltage limiter module is used for upstream transformers or for line
supplies that do not meet ICE requirements (instable line supplies).
Reader’s note
Also refer to additional information in Chapter 2.7.4.
Charge times
Discharge times
Discharge voltage
6 Infeed Modules11.0505.08
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