and start-up
The functional routine of the pre-charging unit is as follows:
1.
The pre-charging contactor (1) closes.
Ensure that the pre-charging contactor (1) as well as the pre-charging resistor R
P
(4) are designed for the
maximum pre-charging current. Please note that the pre-charging contactor (1) must be able to interrupt
the pre-charging current in case of an error!
The main contactor - (3) closes.
Monitor the pre-charging time and open the pre-charging contactor (1) again if the voltage of the power
source is not achieved at the converter after a specific maximum time.
3.
The main contactor + (2) closes.
The main contactor (2) may only close if the converter is successfully pre-charged to the voltage of the
power source.
The pre-charging contactor (1) opens.
The HV connection to the device is now established.
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