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CHAPTER 3: INTERFACES
Description
Display
Working with the
Keypad
345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
Courtesy of NationalSwitchgear.com
The relay front panel provides an interface with a liquid crystal display, LED status
indicators, control keys, and a USB program port. The display and status indicators show
the relay information automatically. The control keys are used to select the appropriate
message for entering setpoints or displaying measured values. The USB program port is
also provided for connection with a computer running the EnerVista SR3 Setup software.
The 80-character liquid crystal display (LCD) allows visibility under varied lighting
conditions. When the keypad and display are not being used, system information is
displayed after a user-defined period of inactivity. Pressing the Menu key during the
display of default message returns the display to the last message shown before the
default message appeared. Any trip, alarm, or pickup is displayed immediately,
automatically overriding the default message.
The 345 display messages are organized into a Main Menu, pages, and sub-pages. There
are four main menus labeled Actual Values, Quick Setup, Setpoints, and Maintenance.
Pressing the MENU key followed by the MESSAGE key scrolls through the four Main Menu
headers, which appear in sequence as follows:
Figure 2: The four Main Menu headers
█ ACTUAL VALUES
Pressing the MESSAGE ► key or the ENTER key from these Main Menu pages will display
the corresponding menu Page. Use the MESSAGE ▲ and MESSAGE ▼ keys to scroll through
the Page headers.
FRONT CONTROL PANEL INTERFACE
QUICK SETUP
SETPOINTS
MAINTENANCE
3–3
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