OverviewSafe Harbor Statement
I simply want .. as a modeler .. to logically wire transformers to my structures. I found this YouTube page – Northwest Lineman College – which has what looks to me like really good information. If someone who is “in the know” .. could translate this into simple diagrams that we modelers could use and even understand would be a ‘good thing’. I suppose what I really would like is a matrix showing wires coming in .. single, dual, triple, quad primary and then the various secondary lines .. why we might want different primary lines .. what we need for the secondary’s. |
Single-phase transformer to 7200V primary with 120/240V secondary
The neutral can be below the transformer or in some areas with lots of lightening above the primary to act as a lightening arrestor. |
Single-phase transformer to 7200V primary with 120/240V secondaryFig_4-2 – Single-phase transformer with one bushing that connects to one single-phase primary 7200V. Provides three-wire 120/240V to the system One reason I like this is because I managed to break a bushing off of a couple of the transformers. |
Single-phase transformer to a three- phase 2,400-volt three-wire ungrounded delta primary voltage system
Figure 4-16 schematically shows the connections of a single-phase transformer to a three- phase 2,400-volt three-wire ungrounded delta primary voltage system to obtain l20-volt single-phase two-wire secondary service. The connections for similar systems operating at other primary distribution voltages such as 4,800, 7,200. 13,200, and 34,400 would be identical. |
Single-phase transformer to a three-phase three-wire ungrounded delta primary voltage system to obtain120/240-volt single-phase three-wire service
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Single-phase distribution transformer connections to a three-phase four-wire wye grounded neutral primary system rated 4,160Y/2,400 volts to obtain 120/240-volt single-phase secondary service
In figure 4-18, the primary system line to neutral voltage is 2,400 vots, and the voltage between phases is 1.73 times 2,400, or 4,160 volts. This system is designated as a 4,160Y/2,400-volt system. Other standard three-phase four-wire wye grounded neutral primary system voltages are 8,320Y/4,800, 12,470Y/7,200, 13,200Y/7,620, and 13,800Y/7,970. |
Three single-phase distribution transformers connected to a three-phase three-wire ungrounded delta primary-voltage system to obtain three-phase three-wire delta secondary service
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