Eaton Digitrip RMS 810 Instructions Manual page 12

Instruction Leaflet I. L. 29-888B
Effective July 2011
Table 3. Digitrip RMS 810 Trip Unit Message Codes and their Meanings.
Message
DISC
EXTT
GNDT
HILD
INST
LDPU
LDT
NPOW
ORID
ORNG
PLUG
ROM ERROR ...
SDT
TEMP
TEST
[blank]
N otee:
In the case of a high-level fault condition, the Trip Unit will operate

whenever a complete RMS current value exceeds the trip level . For
this reason, the displayed value may be less than the actual RMS fault
current .
In the case of a very high fault current, the message "ORNG" (indicating

over range) appears because the Trip Unit cannot display the actual
value of the fault current .
12
eaton corporation www.eaton.com
Meaning
DISCriminator Trip (High initial Current

Release)
EXTernal Trip
GrouND-fault Trip

HIgh LoaD Alarm ALARM: Nearing Overload
Condition
INStantaneous Trip

Long-Time Delay Pick-Up ALARM: Overload
Condition in Progress
Long-Time Delay Trip (Overload Trip)

Negative POWer flow
OverRIDe Trip

Over RaNGe Trip (Current too high to

measure.)
Rating PLUG Problem
Nonfatal memory error
Short-Time Delay Trip

Over TEMPerature Trip
TEST and trip breaker is ready to begin
Test (without tripping breaker) is ready to
begin
or
Trip unit not "ON"
Instructions for Digitrip RMS 810 Trip Unit
comment
Breaker tripped instantaneously because phase current exceeded 11 x rating
I
plug current Value.
n
Breaker tripped due to external communications control signal - for example
from IMPACC .
TM
Breaker tripped because ground current exceeded Ground Fault protection
settings.
Phase current has exceeded 85% of Long-Time Current Setting for more than
40 seconds.
Breaker tripped instantaneously because phase current exceeded
Instantaneous protection setting.
Phase current has exceeded Long-Time current setting. Trip unit is timing to
trip breaker.
Breaker tripped because phase current exceeded Long-Time protection set-
tings.
Power is flowing into "load" side (bottom) of breaker, and out from "line" side
(top) of the breaker.
Breaker tripped instantaneously because phase current exceeded short-time
rating of circuit breaker.
Value of current exceeds display capability of phase current (or ground cur-
rent) of 28 x rating plug current I value.
n
Rating Plug is missing, damaged, or not well connected. If breaker is closed,
it will trip, and the instantaneous / override LED will light. If breaker is open,
it will not close.
Protection functions still operate, but may be up to 12% out-of-tolerance.
Replace trip unit at first opportunity.
Breaker tripped because phase current exceeded Short-Time Delay protection
settings.
Breaker tripped because ambient temperature of microprocessor chip was
excessive.
A trip test will begin as soon as you release the push to test button and
"TEST message will disappear. The breaker will trip, and the cause of trip is
displayed.
A No Trip Unit test will begin as soon as you release push to test button, and
the display shows the elapsed time of test.
Control power is not available, or wrong potential applied.
 OverRlDe (Fixed Instantaneous) Trip is for type LS and LSG Trip Units
(no Instantaneous element), on circuit breakers whose Short-Circuit
current interrupting capability exceeds their Short- Time Current with-
stand capability (see Section 1 .1 .4) .
The values of the currents displayed after a TRIP event, are the values

at the time the TRIP operation was initiated . Although the magnitude
of a fault current, for example, can continue to increase after the TRIP
operation is initiated, those values of current occurring after the TRIP
operation is initiated, are not displayed .
Sec,
1.1.3
5.8
3.8, 3.9
Appendix
B Case1
3.6
3.2
3.2, 3.3
1.2, 1.2
1.1.4
1.2.2
1.3
1.2.2.1
3.4, 3.5
1.1
4.0
4.0
1.4