Local HMI
The relay is equipped with a four-line liquid crystal display.
Depending on the chosen font and language, the number of
visible lines may vary. The display is designed for entering
parameter settings of the protection and control functions. It is
also suited for remotely controlled substations where the relay
is only occasionally accessed locally via the front panel user interface.
The display offers front-panel user interface functionality with
menu navigation and menu views. Depending on the
configuration, the relay displays the related measuring values.
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
remote selection of the 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 maintenance work and that the circuit breakers
cannot be operated remotely from the network control center.
Mounting methods
By means of appropriate mounting accessories, the standard
relay case can be flush mounted, semi-flush mounted or wall
mounted. The flush mounted and wall mounted relay cases can
also be mounted in a tilted position (25°) using special accessories.
Further, the relays can be mounted in any standard 19”
instrument cabinet by means of 19” mounting panels available
with cut-outs for one or two relays.Alternatively, the relays can
be mounted in 19” instrument cabinets by means of 4U
Combiflex equipment frames.
For routine testing purposes, the relay cases can be equipped
with test switches, type RTXP 18. which can be mounted side
by side with the relay cases.
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