Schweitzer Engineering Laboratories SEL-421-4 - Page 132

4.4
SEL-421 Relay Instruction Manual Date Code 20171021
Front-Panel Operations
Front-Panel Menus and Screens
trol, and settings for configuring the SEL-421 to your specific application needs.
Use the following menus and screens to set the relay, perform local control
actions, and read metering:
➤ Support Screens
➢ Contrast
➢ Password
➤ MAIN MENU
➢ METER
➢ EVENTS
➢ BREAKER MONITOR
➢ RELAY ELEMENTS
➢ LOCAL CONTROL
➢ SET/SHOW
➢ RELAY STATUS
➢ VIEW CONFIGURATION
➢ DISPLAY TEST
➢ RESET ACCESS LEVEL
➢ ONELINE DIAGRAM
See Section 4: Front-Panel Operations in the SEL-400 Series Relays Instruction
Manual for information on most of these screens. The following screen descrip-
tions are unique to the SEL-421.
Meter
The SEL-421 displays metering screens on the LCD. Highlight METER on the
MAIN MENU screen to select these screens. The METER MENU, shown in Figure 4.2,
allows you to choose the following metering screens corresponding to the relay
metering modes:
➤ RMS METER
➤ FUNDAMENTAL METER
➤ DEMAND METER (if enabled)
➤ ENERGY METER
➤ MAX/MIN
➤ SYNCHRONISM CHECK (if enabled)
Figure 4.2 METER MENU Screens
METER MENU METER MENU
Demand Meter Enabled
(EDEM := ROL or
EDEM := THM)
Synchronism Check Enabled
(E25BK1 := Y, Y1, Y2 or
E25BK2 := Y, Y1, Y2)
No Synchronism Check
No Demand Metering
(E25BK1 := N)
(E25BK2 := N)
(EDEM := OFF)
RMS METER
FUNDAMENTAL METER
ENERGY METER
MAX/MIN
RMS METER
FUNDAMENTAL METER
DEMAND METER
ENERGY METER
MAX/MIN
SYNCHRONISM CHECK