12
Instruction Leaflet
I. L. 29-886B
Effective August 2011
Instructions for Digitrip RMS 610 Trip Unit
eaton corporation
www.eaton.com
1.2.2 Messages Displayed After ALARM or TRIP
During an ALARM condition or after a circuit breaker TRIP opera-
tion, one of the coded messages listed in Table 3 will appear in
the display window, provided control power is still available for the
Power/Relay Module (see Section 1 .4) . If the "STEP" push-button is
pressed, the message will be deleted so that menu values of cur-
rents (kA) etc . can be viewed in the window .
otee:
N
Press and release the "STEP" push button several times to be sure you
see the values of all the currents . The first value you see may not be the
greatest .
Following a circuit breaker TRIP operation, the display window
indicates the reason for trip, using coded messages such as, INST
(Instantaneous Trip), LDT (Long Delay Trip) etc . As with the ALARM
function, press and release the "STEP" push-button to delete the
reason for trip message and the display window will then show the
values of current at the time of trip (see Notes [1], [2], and [3] under
Table 3) . The values remain in memory, and the "red" reason for Trip
LED (see Figures 1 and 3 through 8) remains lighted, until the Trip
Unit is reset by pressing and releasing the "TRIP RESET push-button
in the lower right corner of the Trip Unit (see Figure 1) .
otee:
N
After a trip condition, RECORD all Values of interest and note which
"RED" LEDs are lighted . Correct the cause of the overload or fault BEFORE
YOU RESET the Trip Unit to avoid repeated tripping .
The LOCKOUT after trip feature requires the Trip Unit to be reset
before the breaker can be closed again .
For examples of how to interpret the display after an overload and
after a short-circuit, see Appendix B .
Figure 9. Rating Plug.
1.2.1.1 ROM Error ... See I.L.
If the message, "ROM Error . . . See I .L .", scrolls across the display
window, it means that a non-fatal error has been detected some-
where in the Trip Unit's non-volatile memory . The Trip Unit will still
function to protect the circuit, but the calibration may be degraded
by a few percent . The Time-Current Curve tolerances may be exceed-
ed in some cases by as much as 12% .It is not necessary to trip and
lockout the breaker . There may also be errors in values of current
displayed and they could even be greater than 12% . The scrolling
message will not remain in the window constantly, and you can read
present values of parameters at any time by pressing and releasing
the "STEP" push button, as you normally would . The message will
automatically reappear every few minutes, and further, every time
you press and release the "TRIP RESET" push button, the message
will also be displayed, to remind you to replace the Trip Unit at your
earliest opportunity .
1.3 Frame Rating, Sensor Rating (Where Applicable) and
Rating Plugs
The
Frame Rating
of a circuit breaker is the maximum RMS cur-
rent it can carry continuously . The maximum Short-Circuit Current
Ratings of the circuit breaker are usually related to the Frame Rating
as well .
It is often times desirable to be able to choose a current value
(I
n
)
,
less than the full frame rating, to be the basis for the circuit break-
er's protection functions, without affecting its short-circuit current
capability . For the Digitrip RMS 610 Trip Unit the maximum continu-
ous current (I
n
) is set by the
Rating Plug
(and/or
Current Sensors
,
where applicable) - see Section 5 for specific instructions for your
circuit breaker type .
The
(Current) Sensor Rating
(where applicable) is the maximum
RMS current the circuit breaker can carry with the specified current
sensors installed . The Sensor Rating can be the same or less than
the Frame Rating, but not greater .
The
Rating Plug
(see Figure 9) fits into a special cavity to complete
the Trip Unit (see Figure 1) .
Polarity
Marks
Hinged
Cover
Battery
Rating Plug
is for Type
SPB Circuit
Breakers Only
Rating Plug
for R-Frame
and DS
Breakers
are Similar
Values for Short
Delay S1 and S2
Instantaneous
M1 and M2
Settings
Pull Tab to
Remove
Battery
Rating Plug
Identification
"Battery
Check"
Push
button
Battery "OK"
if LED Lights
"GREEN" when
"Battery Check"
Button is
Pushed
Rating Plug
Retention
Screw
Battery
Removal Tab
Polarity
-
+
