Section 12 Control and supervise the bay
About this chapter
This chapter describes the various control and supervision functions available in the
HMI. In particular, how the single line diagram available on the display can be used
for this purpose. It also describes the Selector switch function available under the
control menu.
12.1
Overview
The control menu in the HMI includes the Single line diagram, Single command and
Selector switch functions.
The Single Line Diagram (SLD) is used to control and supervise the bay by allowing
the 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 example
MicroSCADA were to malfunction, then bay level switches and circuit breakers can
be controlled directly from the HMI.
The Single command function is used to view LON interlocking data and is only
visible if LON is configured and used in the system.
The Selector Switch function is configured in the PCM 600 tool and the switch
position can be changed in the HMI. The selector switch has the same function as a
rotating switch with up to 32 positions. Each position is configured in the PCM 600
to match a certain application. Each position number corresponds to the equivalent
position of a rotating switch. It is only visible if it has been configured in the PCM
600.
12.1.1
Read measured values and check apparatus status
In the single line diagram a number of measured quantities are displayed. These are
normally system voltage (U), system current (I), active power (P) and reactive power
(Q). They are displayed on the right hand side of the SLD graphic. The quantities
shown can be configured in the PCM and may therefore not always have the same
appearance in different IEDs.
12.1.2
Locating and using the single line diagram
It is possible to navigate the SLD screen using the up and down keys on the IED
keypad. The apparatus under control is highlighted as the user moves from symbol
Section 12
Control and supervise the bay
RET 670
Operator's manual
1MRK504049-UEN rev. D
75
