4.2.16
Incomplete Sequence Report Back Time (INSQ)
The incomplete sequence function requires an input from the report back contact from
the process that the motor is running. Shortly after the motor starts, the report back
contact provides an indication that the process has started to operate as expected. If the
process does not start up correctly, the contact does not close within the expected time.
If a problem develops later on, the report back contact opens. In either case, the open
contact state indicates that the motor should be tripped.
To use this function, set a time limit for report back here and dene the start of report
back timing. Connect the report back contact to one of the protective device Discrete
Inputs. If this input is not energized before the set time expires, the relay will trip on an
“Incomplete Sequence”.
Note that the input must be energized continuously after the time delay has expired to
hold o this trip. Otherwise, if the incomplete sequence report back contact changes
state for a period greater than 0.5 seconds, the relay will trip on an incomplete sequence.
This delay allows for any momentary transient switching that may occur in the process
report back contact, such as that which can occur in an open transition reduced voltage
start.
0
MotorStart_F03
1
0
1
0
1
0
1
0
1
0
1
0
46
Trip
No Trip
(<500 ms)
No Trip
Trip
(>500 ms)
t
t
t
t
>500 ms50 ms
MStart . INSQ-I
MStart . Run
MStart . Start
MStart . Stop
InSq Start2Run
InSq Stop2Start
152 www.eaton.com EMR-3MP0
4 Protective Elements
4.2 Motor Starting and Control Module
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