
43
20. Local HMI
The relay is available with two optional displays, a
large one and a small one. The large display is
suited for relay installations where the front panel
user interface is frequently used and a single line di-
agram is required. The small display is suited for re-
motely controlled substations where the relay is
only occasionally accessed locally via the front
panel user interface.
The LCD display offers front-panel user interface
functionality with menu navigation and menu
views. The display also offers increased
front-panel usability with less menu scrolling and
improved information overview. In addition, the
large display includes a user-configurable single
line diagram (SLD) with position indication for the
associated primary equipment. Depending on the
chosen standard configuration, the relay displays
the related measuring values, apart from the de-
fault single line diagram. The SLD view can also be
accessed using the Web browser-based user inter-
face. The default SLD can be modified according to
user requirements by using the Graphical Display
Editor in PCM600. The user can create up to 10 SLD
pages.
The local HMI includes a push button (L/R) for local/
remote operation of the relay. When the relay is in
the local mode, it can be operated only by using the
local front panel user interface. When the relay is in
the remote mode, it can execute commands sent
from a remote location. The relay supports the re-
mote selection of local/remote mode via a binary
input. This feature facilitates, for example, the use
of an external switch at the substation to ensure
that all relays are in the local mode during mainte-
nance work and that the circuit breakers cannot be
operated remotely from the network control center.
—
Figure 12. Display
—
Table 81. Display
Character size
(1)
Rows in the view
Characters per row
Small, mono-spaced (6 × 12 pixels)
10
20
Large, variable width (13 × 14 pixels)
7
8 or more
1) Depending on the selected language