Short Indicator –
A red colored LED flashes when a short
delay protection short circuit trip has occurred. An orange
colored LED will be illuminated and flashing to indicate an
abnormal breaker condition has occurred in the circuit breaker.
Refer to Appendix B Troubleshooting.
INST Indicator
– A red colored LED flashes to indicate that
an instantaneous trip, a making current release trip, or the arc
flash maintenance mode trip has occurred. An orange colored
LED will be illuminated and flashing to indicate a bad rating plug
has been detected.
Ground (Earth) / Ground Alarm (Only) Indicator (optional)
A red colored LED flashes whenever there is a ground trip or
for ground alarm condition from the trip unit.
Trip Indicator
– A red LED will illuminate whenever there is a
trip condition from the trip unit.
Alarm Indicator
– An orange colored LED is illuminated
whenever any of the alarms are enabled and the alarm
conditions are present.
Figure 13. Display Module Push Buttons
Display Module Push Buttons
Up Arrow Push Button
– Used to move up in the menu display
screen or increase an adjustment value.
Down Arrow Push Button
- Used to move down in the menu
display screens or decrease an adjustment value.
Right Arrow Push Button
– Used to move to a previous or
adjacent display screen.
Left Arrow Push Button
– Used to move to the next adjacent
display screen.
Save Push Button
– Used to save settings. This push button
is covered by the clear cover and can be sealed to deter
unauthorized changing and saving of the setpoints.
ESC Push Button
– Used to escape or move back to the
previous level of menu displays.
SEL Push Button
– Used to select a menu or parameter.
Menus
Display
When the Digitrip 1150 trip unit is first powered-up, the display
will show a learning screen. This screen will only last briefly as
the microprocessor in the display module learns the information
about the system and the trip unit. The trip unit at this time is
already functioning and performing protection calculations and
could be called upon to trip the circuit breaker independently
of the display module actions. Following this, the display
will enter into the MAIN menu screen. See
Appendix D:
Display, Indicators and Menus
for more information on the
programming screens.
If the Digitrip settings have not been saved previously, the trip
unit will use factory default values.
Main menu
There are seven different submenu selections from the main
menu. Each of these submenus is selectable by highlighting
the icon and pressing the SEL push button. Depending on
the Digitrip model, certain menus or screens are not viewable
or programmable. Such as when using the LSI style trip unit,
viewing and programming menu screens involving Ground or
Earth settings are not viewed or accessible.
Main Menu with Metering Submenu Highlighted
21
EATON
www.eaton.com
Operating Manual for Series NRX
Digitrip Trip Units 1150 / 1150i
Effective September 2013
Instructional Leaflet IL01301064E
