U.5.6
SEL-421 Relay User’s Guide Date Code 20090715
Front-Panel Operations
Front-Panel Layout
Figure 5.5 Sample ROTATING DISPLAY
The active alarm points are the first set of screens displayed in the ROTATING
DISPLAY
(see Alarm Points on page U.5.7). Each alarm points screen shows as
many as 11 alarm conditions. The SEL-421 can present a maximum of 6 alarm
points screens.
The active display points are the second set of screens in the
ROTATING
DISPLAY
(see Display Points on page U.5.10). Each display points screen
shows as many as 11 enabled display points. (With 96 display points, the
SEL-421 can present a maximum of 9 display points screens.) If a display
point does not have text to display, the screen space for that display point is
maintained.
Circuit Breaker 1
--Closed--
ROTATING DISPLAY
Press for menu
Line Current (A) RMS
IA =
119.6
IB =
119.7
IC =
119.5
FREQ =
60.00
Hz
ROTATING DISPLAY
Press for menu
Line Quantities FUND
ROTATING DISPLAY
Press for menu
Voltage (kV)
VA = 130.4 + 6˚
VB = 130.3 -114˚
VC = 130.5 -126˚
Current (A)
IA = 119.6 35˚
IB = 119.7 -95˚
IC = 119.5 155˚
FREQ = 60.00 Hz
Circuit BK1 SF6 Gas
--Alarm--
Circuit Breaker 2
A PH= 119.6 A pri
SF6 ALARM
*Circuit BK1 SF6 Gas
ROTATING DISPLAY
Press for menu
Courtesy of NationalSwitchgear.com
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