Chapter 9. Local Interface: Graphic Display
9-5
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
Devices of this type are represented as follows:
When the
Pulled Out
signal is activated, the corresponding symbol of Figure 9.2 will appear
without any representation of the state of the Breaker and independently of its state.
When the
Unplugged
signal is activated (1), without being
Pulled Out
, the Breaker will be
represented according to the state of the "a" and "b" contacts associated with it. As indicated
in Figure 9.2, the continuity section from the Breaker to the plug-in terminals which go to
Busbars and to Line will not be drawn.
When the
Unplugged
signal is deactivated (0), the Breaker will be represented according to
the state of the "a" and "b" contacts associated with it. As indicated in Figure 9.2 (plugged
in), the continuity section from the Breaker to the plug-in terminals towards Busbars and
towards Line will also be drawn.
For Double Busbar Configurations with Plug-in Breakers, the unit will be conceived for
executing the command independently (independent Digital Outputs and Inputs), on each of the
two plug-in positions (Busbars A and Busbars B) independently of whether the position is
equipped with two mounted Breakers (the case of transformer taps and partition of Busbars) or
with a single mounted Breaker (the case of Line Positions and Capacitor Bank).
In the case of the Three-Position Busbar Disconnectors, the representation can depend on the
state of three digital inputs corresponding to the situation of the element in each of the three
possible states:
Connected to Busbars
,
Open
and
Connected to Ground
.
When, after a set time, the simultaneous presence of two or more indications or the absence of
the three indications is detected, the state of unknown will be generated for the element under
consideration. The treatment of this device will be like that of two disconnecting switches that
are superposed and selectable by means of the Graphic Display keypad:
Busbar
Disconnector
and
Ground Breaker
.
From the point of view of the control of these devices, they are also considered two (2)
independent devices upon which open and close orders can be executed independently. These
orders can be:
-
Busbar Disconnector
“OPEN Order”
-
Busbar Disconnector
“CLOSE Order”
-
Ground Breaker
“OPEN Order”
-
Ground Breaker
“CLOSE Order”
