Good day All!!
I am sitting with a problem, I am the chief engineer on board a 164foot super yacht and I have 2 x 50kVA 3ph 385VAC 50hz inverter/frequency drives which work together as a master and slave and each has its own voltage stabilising transformer. Both inverters are always on and in phase with each other and load share as the demand of the boat increases or decreases.
The units are both ATLAS ShorPOWER CLASSICS and operate on any input frequency (50hz or 60hz) and can't take 110Vac 230Vac single phase or 380Vac - 500Vac 2 phase. There is internal DC BUS in each frequency drive and the two units set output to 385Vac 50hz so that the boat can have power where ever it dock in the world. Currently docked in country where shore power is 400V 50hz.
PROBLEM:
Both Frequency drives have suffered damage as they are old and I need to get the boat off the massive on board generators onto dock power while we wait for engineers to fly in.
Question
Can I simply disconnect the frequency drives outputs before the voltage stabilising transformers and connect the dock side power to the transformers in a parallel connection????
Phase rotation will be checked before final connections are made.
I am sitting with a problem, I am the chief engineer on board a 164foot super yacht and I have 2 x 50kVA 3ph 385VAC 50hz inverter/frequency drives which work together as a master and slave and each has its own voltage stabilising transformer. Both inverters are always on and in phase with each other and load share as the demand of the boat increases or decreases.
The units are both ATLAS ShorPOWER CLASSICS and operate on any input frequency (50hz or 60hz) and can't take 110Vac 230Vac single phase or 380Vac - 500Vac 2 phase. There is internal DC BUS in each frequency drive and the two units set output to 385Vac 50hz so that the boat can have power where ever it dock in the world. Currently docked in country where shore power is 400V 50hz.
PROBLEM:
Both Frequency drives have suffered damage as they are old and I need to get the boat off the massive on board generators onto dock power while we wait for engineers to fly in.
Question
Can I simply disconnect the frequency drives outputs before the voltage stabilising transformers and connect the dock side power to the transformers in a parallel connection????
Phase rotation will be checked before final connections are made.