11
Instruction Leaflet
I. L. 29-886B
Effective August 2011
Instructions for Digitrip RMS 610 Trip Unit
eaton corporation
www.eaton.com
Table 3. Digitrip RMS 610 Trip Unit Message Codes and their Meanings.
Message
Meaning
comment
Sec,
DISC
DISCriminator Trip
(High initial Current
Release)
Breaker tripped instantaneously because phase current exceeded 11 x rating plug current
I
n
Value.
1.1.3
GNDT
GrouND-fault Trip
Breaker tripped because ground current exceeded Ground Fault protection settings.
3.8, 3.9
HILD
HIgh LoaD Alarm ALARM: Nearing Overload
Condition
Phase current has exceeded 85% of Long-Time Current Setting for more than 40 seconds.
Appendix B
Case1
INST
INStantaneous Trip
Breaker tripped instantaneously because phase current exceeded Instantaneous protection
setting.
3.6
LDPU
Long-Time Delay Pick-Up ALARM: Overload
Condition in Progress
Phase current has exceeded Long-Time current setting. Trip unit is timing to trip breaker.
3.2
LDT
Long-Time Delay Trip
(Overload Trip)
Breaker tripped because phase current exceeded Long-Time protection settings.
3.2, 3.3
ORID
OverRIDe Trip
Breaker tripped instantaneously because phase current exceeded short-time rating of circuit
breaker.
1.1.4
ORNG
Over RaNGe Trip
(Current too high to
measure.)
Value of current exceeds display capability of phase current (or ground current) of 28 x rating
plug current I
n
value.
1.2.2
PLUG
Rating PLUG Problem
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.
1.3
ROM ERROR ...
Nonfatal memory error
Protection functions still operate, but may be up to 12% out-of-tolerance. Replace trip unit
at first opportunity.
1.2.2.1
SDT
Short-Time Delay Trip
Breaker tripped because phase current exceeded Short-Time Delay protection settings.
3.4, 3.5
TEMP
Over TEMPerature Trip
Breaker tripped because ambient temperature of microprocessor chip was excessive.
1.1
TEST
TEST and trip breaker is ready to begin
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.
4.0
[blank]
Test (without tripping breaker) is ready to
begin
or
Trip unit not "ON"
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.
4.0
1.4
otee:
N
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 .
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 .
