Figure 35.
DC side load connection
2.5.5
Relay section
The
reference design uses two groups of relays to manage the AC side connection and ICL.
Step 1.
To verify the functionality, configure the power board as shown below.
Figure 36.
Relay jumper configuration
Step 2.
Connect the first row of the selector to the left side to set the manual mode.
Step 3.
Close or open the second row in the right or left jumper position.
Step 4.
Check the relay impedance with a multimeter according to the configuration (three-phase and neutral).
2.6
Startup procedure
After connection and debugging initialization, you can perform the startup procedure.
An embedded finite state machine handles this procedure. It consists of different states that perform a preliminary
check of the converter and the precharge of the capacitor. Then the burst operation boosts the output voltage.
The
reference design allows managing the complete startup procedure.
However, a controlled step-by-step procedure is available. It is useful during the preliminary test or after
hardware/software modification.
UM2979
Startup procedure
UM2979
-
Rev 1
page 21/70
