I’m not familiar with the automation of their power management system but I don’t think they ever had to go to EDG power.
I’m Chief Eng of a modern Chinese built US flagged Tanker that was built for to class LR standards.
I have 4 AE’s on my ship. I had a very similar power failure a few months ago where I had went to put a second generator online in preparation for arrival and when the breaker for the oncoming generator attempted to close it failed to close. At the same time the inline generator tripped on high voltage we went over 490v on a 450v bus.
When this happened I had a total power failure and lost the plant just like the Dali did. My EDG started but I was able to manually close the breaker to the generator that I still had running that had failed to close. We had to go and close all of our under-voltage trips on the switchboard as well as through out the plant. Because we were making way and underway the engine was very easy to restart once we cleared the EOT alarms.
We never went on EDG power but it did start and idle, then started its cool down procedure and returned to standby status on its own.
Hope this helps.