5.39
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Control
Bay Control Example Application
One-Line Analog Display
One-line diagrams in the relay can contain as many as six Analog Quantity dis-
play points. The MIMIC setting selected in this example displays six Analog Dis-
play points. See Display Points on page 4.10 for Display Point programming.
The settings below illustrate how to display text and Analog Quantities available
in the mimic display. If analog display points are not required to appear in the
one-line diagram, leave the setting(s) blank, and the relay will only display the
defined display points.
1. 1, “Analogs”
2. IAWM, “IA:(4.0,1)A”
3. VABFM, “V:(3.0,1)kV”
4. FREQ, “F:(4.1,1)Hz”
5. 3P, “P:(3.0,1)MW”
6. 3Q_F, “Q:(3.0,1)MVR”
Control Selection
The LOCAL SELOGIC control equation enables local and remote control of the
disconnect switch. This example illustrates how the SEL-451 input contact
IN107 can accommodate existing bay controls that use a key to manually change
from remote to local control. The key switch is made to actuate a contact when
the key is turned, as shown in Figure 5.30. With the contact of the switch wired to
the SEL-451 input, the key switch provides local and remote control. Make the
following setting to enable LOCAL control when IN107 is asserted.
LOCAL := IN107
Front-Panel Settings
The one-line diagram is one of the screens that are available for display in the
rotating display. To display RMS_V, RMS_I, and ONELINE screens on the rotat-
ing display every five seconds, make the following Front-Panel settings.
SCROLD := 5
RMS_V := Y
RMS_I := Y
RMS_VPP := N
Figure 5.30 Local and Remote Control Logic With Key Control
-
+
Rated SEL-451
DC Input Voltage
Contact closed = Local control
Contact open = Remote control
SEL-451
IN107
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