Why the bypass transformer input is fed from Normal LV Switchboard and the rectifier transformer is fed from Emergency LV Switchboard? If so, how the outputs are synchronised?
Do you have a diagram for the kind of thing you have in mind - I am not sure if the below answers the question you mean to ask?
Clear'y anything that is going to be rectified (converted to DC) dopes not need to be synchonous. The UPS output is an AC created by chopping the DC, be that from batteries of from the rectifier, To make those switches synchronous to the incoming bypass AC prior to switching over is relatively easy.
Do you have a diagram for the kind of thing you have in mind - I am not sure if the below answers the question you mean to ask?
Clear'y anything that is going to be rectified (converted to DC) dopes not need to be synchonous. The UPS output is an AC created by chopping the DC, be that from batteries of from the rectifier, To make those switches synchronous to the incoming bypass AC prior to switching over is relatively easy.
