Vlotage Limits for shore power connection to Naval Vessels 1

[Rodmcm]

Does anyone know of the standard that defines the voltage limits that must be normally maintained for a shore power connection to naval vessel at 60 HZ 460V nominal i.e what is the allowable+/- percentage

 

[glendale]

As a final comment on the issue, the other reason for having a voltage regulating transformer is that when ships generators are paralleled with the shore supply a load change on the ship would result in a flow of reactive current between an unregelated shore supply transformer and the generator. If left unchecked this reactive current can be considerable and may result in operation of overcurrent protection. This occurs because the no load to full load volt drop of an unregulated transformer is considerable in comparison to the droop characteristic of the generator AVR. Also the AVR droop only occurs for rising lagging reactive load where the transformer volt drop occurs for active or reactive load current.