Operational Status And Protection Trip Indicators; Figure 1. Digitrip Rms 910 Trip Unit Type Lsig With Rating Plug - Eaton Digitrip RMS 910 Instruction Leaflet

Instructions for Digitrip RMS 910 Trip Unit

1.1.1 Operational Status and Protection TRIP Indicators

The "Green" Light Emitting Diode (LED) in the lower right corner of
the Trip Unit (Figure 1) "blinks" once each second to indicate the Trip
Unit is operating normally .
N otee: If the LED is steadily "GREEN", i .e . not blinking, the Trip Unit is not
ready . Check the 120 VAC control power to the Power / Relay Module, if the
LED is not blinking (see Section 1 .4 .) .
The LEDs, shown in Figures 1 and 3 thru 8 on the face of the Trip
Unit, light "RED" to indicate the reason for any automatic trip opera-
tion . As indicated in Figures 3 - 8, each LED is strategically located
in the related segment of the time-current curve depicted on the
face of the Trip Unit . The reason for trip is identified by the segment
of the time-current curve where the LED is lighted "RED", and is
also identified on the Display . Following an automatic protection trip
operation, the external control power to the Power / Relay Module
(see Section 1 .4) will maintain the LED "RED" and will continue to
send a TRIP signal to LOCKOUT the circuit breaker until the Trip
Unit is RESET. The Digitrip RMS 910 Trip Unit can be RESET in two
ways:
Either press and release the "TRIP RESET" button (See Figure 1
•
lower right corner just above the "UNIT STATUS" LED);
or
By the "Trip Reset" remote communications function (see Section
•
5 .9 .) .
Green LED's
Light to Identify
Which Value Is
Presently Being
Displayed in
Window
The Unit INCOM
Address
Catalog Number
LED's light "Red"
to indicate cause
of trip
Time-Current curve for
Phase Protection
Time-Current
Curve for Ground
Protection
SPB Rating Plug

Figure 1. Digitrip RMS 910 Trip Unit Type LSIG with Rating Plug.

View Settings in Adjust Protection Settings
Window for Desired Values with
Rotary Switches
Instruction Leaflet I. L. 29-889B
Keyed
Receptacle
for Auxiliary
Power Module
Connector (See
Section 1 .6)
4-Character
Display Window
Press and release "PEAK RESET"
Push button to Reset Peak Demand
Reading to Zero
Press and release "STEP" Push button
to Display Value of Next Parameter in
Window
DS Rating Plug
Press and Release "Test"
Push Button to Initiate
Self-Test (See Section 4)
Press and Release "Trip
Reset" Push Button to
Reset Trip Unit
R-Frame Rating Plug
Trip Unit Operation Status
"Blinking Green"=OK (See
Section 1 .1 .1)
eaton corporation www.eaton.com
Effective June 2011
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