Section 12 Control and supervise the bayAbout this chapterThis chapter describes the various control and supervision functions available in theHMI. In particular, how the single line diagram available on the display can be used forthis purpose. It also describes the Selector switch function available under the controlmenu.12.1 OverviewThe control menu in the HMI includes the Single line diagram, Single command andSelector switch functions.The Single Line Diagram (SLD) is used to control and supervise the bay by allowingthe operator to close and open apparatuses using keys on the front panel of the IED.This is primarily intended as a backup for higher level control systems. If for exampleMicroSCADA were to go out of service, then bay level switches and circuit breakerscan be controlled directly from the HMI.The Single command function is used to view LON interlocking data and is onlyvisible if LON is configured and used in the system.The Selector Switch function is configured in the PCM600 tool and the switch positioncan be changed in the HMI. The selector switch has the same function as a rotatingswitch with up to 32 positions. Each position is configured in the PCM600 to match acertain application. Each position number corresponds to the equivalent position of arotating switch. It is only visible if it has been configured in the PCM600.12.1.1 Read measured values and check apparatus statusIn the single line diagram a number of measured quantities are displayed. These arenormally system voltage (V), system current (I), active power (P) and reactive power(Q). They are displayed on the right hand side of the SLD graphic. The quantitiesshown can be configured in PCM600 and may therefore not always have the sameappearance in different IEDs.1MRK506276-UUS B Section 12Control and supervise the bay95Operator's manual
