If multi-line connections are defined at another connection definition point on the connection, this is reported via a check run. This information is saved at the connection definition point and used to generate multi-line connections - in addition to the single-line connections.įor a single-line connection, only the graphically first connection definition point with multi-line connection definitions is reported. You can also edit the properties of these connections and, for example, define the connection color and the connection designation. In this tab you can define the connection points on the devices between which connections should be created. If a connection definition point has the representation type "Single-line", the Interconnect devices tab is displayed in the property dialog. You can define the multi-line connections on single-line connection definition points. The property Manage unplaced auxiliary functions at the main function should be activated for this function.ĭefining the multi-line connections at the connection definition point The single-line function of the device (e.g.the pins) must be present in the project as unplaced functions. The multi-line functions of the device (e.g.The following preconditions must be in place in order to do this: If the single-line plan is followed by further project planning stages based on multi-line connections ( reports, e.g., connection lists), you need to generate multi-line connections from the single-line connection schematic. two modules connected via a serial interface). Single-line only documentation of the schematic can be useful, for example, if the connections between the devices are largely standardized and therefore no further detail in the form of a multi-line schematic is necessary (e.g. This means that you can produce a multi-line report on connection points and connections even in a purely single-line representation. Another box represents the power control center, motor control centers and connecting them with feeders.Ĭurrent transformers are shown in two places with indicators.Ī neutral ground resistor (NGR) is shown connected to a neutral line to provide protection to the generator against earth faults.Ĭircuit breakers are shown at various places for isolation of power for the transformer, PCC, and MCC.Multi-line connections can also be defined in the single-line representation. The single line diagram is divided into two portions, from generation to substation are shown in a dotted grey line box. Greyline represents three-phase power in a single conductor. The blue circle overlapped represents the transformer from HT to LT power. The red box represents the circuit breakers. From the above one-line drawing, one can easily understand that the line shown from power generation, number breakers, HT/LT transformer, power control Center (PCC), then Motor control center, finally to feeders. The above single line diagram shows right from generation to distribution stage. The restoration of power can be possible by identifying.Įlectrical engineers: Use single line diagrams to understand system behavior and to make changes to the power system to improve performance.Įnd-users: Use the single-line diagrams to identify their electrical equipment, circuits, and protection apparatus.įamiliarity with electrical symbols helps one to understand the overall system connections. System operators: Use the single-line diagrams to identify the electrical placement of breakers, switches, transformers, regulators, and so on in substations that may indicate alarms. It shows how all alternate sources may be isolated. Line crew: Single line diagram drawing tells the worker at a glance where the disconnecting means is located. Helps to view the relationships between smaller sections of the power system and the overall system.Useful for switching orders to change system configurations.Helps in rerouting power after a fault.They are very useful for planning maintenance activities.It also includes the system protection schemes. The required information is added to give the engineer or a system operator the full picture of the electrical system. It is a simplified drawing of the whole system or a portion of the power system that shows the electrical placement of all major equipment.Ī single line diagram is a simplified explanation for representing a three-phase power system. An electrical single line diagram abbreviated as SLD is also referred to as a one-line diagram.
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