Trip Unit Indicators
Status Indicator
– A red and green colored LED can be
switched on to produce colors of green, red or orange for this
indicator. When the trip unit is healthy and operational with
auxiliary power or current through the circuit breaker that is
greater than 50A (NF Frame) or 100A (RF Frame) three phase,
the indicator will flash green at a 1 second (1 Hz) rate. If the
trip unit is picked up in long delay overload protection, the
green LED will flash at twice the speed of the normal status
indication. When an abnormal condition is detected in the
circuit breaker the trip unit will turn on the red status LED
creating a red then orange flashing color from the indicator.
This Status LED indication can occur if an abnormal condition
is detected in the circuit breaker, trip actuator, or an internal
electronic validation check has failed.
Maintenance Mode Indicator (optional)
– A blue colored LED
will be illuminated whenever the ARC FLASH MAINTENANCE
MODE protection circuit is active.
Long Indicator
– A red colored LED that flashes when a long
delay protection overload trip has occurred. An orange colored
LED will be illuminated and flashing to indicate if an over-
temperature trip has occurred.
Metering
Current
Voltage
Power
Energy
Frequency
SEL
SAVE
ESC
Status
Maint. Mode
Long
Short
Inst.
Ground
Trip
Type NF Frame
Group A
Rating Plug
In=400A
Cat NA250T
Test
Port
Aux.
Power
Alarm
+
Battery
-
CR 1/3N
DL 1/3N
Battery Check
Reset/
Bettery Test
Metering
Current
Voltage
Power
Energy
Frequency
SEL
SAVE
ESC
Status
Maint. Mode
Long
Short
Inst.
Ground
Trip
Type NF Frame
Group A
Rating Plug
In=400A
Cat NA250T
Test
Port
Aux.
Power
Alarm
+
Battery
-
CR 1/3N
DL 1/3N
Battery Check
Reset/
Bettery Test
Figure 12. Trip Unit Indicators (LSIG style with Maintenance
Mode)
20
EATON
www.eaton.com
Section 5: Display Module Interface
Display
The Digitrip 1150 trip unit has a graphic color LCD display on
the front of the trip unit. The self contained display module
holds the LCD display and the push buttons that interface to
the trip unit as shown in
Figure 11
.
The Digitrip 1150 trip unit will be operational in the event
that something on the display module is not functional or
is removed. All protective setpoints are stored in the main
trip unit body. If any one of the Communication Accessory
Modules (CAM) is used with the Digitrip 1150, a duplicate
copy of the setpoints may be stored in that module as well
as the trip unit body.
Figure 11. Trip Unit and Display Module
Operating Manual for Series NRX
Digitrip Trip Units 1150 / 1150i
Effective September 2013
Instructional Leaflet IL01301064E
