Sp Start, Settings P5L1 To P5L12 - Eaton MP-3000 Instruction Leaflet

IM02602002E
5.4.1 Setting P4L1, Ground fault alarm Level (Gfa)
P4L1 sets the ground fault alarm current pickup level in percent of
ground CT ratio numerator. For example, with a 50:5 ground fault CT
and a setting of 10%, the GFA function picks up at 10% of 50 A, or
5 A of actual ground fault current in the motor. The start and/or run
delays must expire before the alarm output occurs.
5.4.2 Setting P4L2, I2T alarm Level (I2Ta)
P4L2 sets the I2T model thermal accumulator or thermal bucket level
at which the relay alarms, in percent of I2T bucket trip value. This im-
portant alarm indicates that the MP-3000 thermal model is progressing
toward a thermal protective trip (thermal capacity bucket is filling), so
that the User can act to reduce loading or protect the process.
This setting also determines when the I2T trip condition can reset. After
a trip, the I2T bucket or thermal accumulator must cool below the I2T
alarm level before the thermal trip can reset. Refer to setting P12L5 for
more on resetting of this thermal trip.
5.4.3 Setting P4L3, jam alarm Level (jMa)
Sets the current limit in percent of FLA at which the jam alarm picks up.
This alarm can be set to OFF. JMA is set to a lower level than the jam
trip level P3L6. The start delay is the same as for the jam trip function;
refer to P3L7. Use with the run delay described in the next subsection.
5.4.4 Setting P4L4, jam alarm Run Delay (jMaR)
P4L4 sets the number of seconds that the jam alarm level must be
maintained before the alarm occurs.
5.4.5 Setting P4L5, Under load alarm Level (ULa)
P4L5 specifies the current level in percent of FLA below which the MP-
3000 alarms. The start delay is the same as for under load trip
(refer to P3L10). Use with the under load run delay described in the
next subsection. Note that ULA must be set to a higher current value
than the under load trip level P3L9.
5.4.6 Setting P4L6, Under load alarm Run Delay (ULaR)
P4L6 sets the number of seconds that the current must remain below
the under load alarm limit before the alarm occurs.
5.4.7 Setting P4L7, Phase Unbalance alarm Level (UBa)
P4L7 sets the percent of phase current unbalance above which the
MP-3000 alarms. This alarm can be set to OFF. The start delay is the
same as for the phase unbalance trip (refer to P3L13). Use with unbal-
ance alarm run delay described in the next subsection. Refer to P3L12,
Unbalance Trip Level, above for more information.
5.4.8 Setting P4L8, Phase Unbalance alarm Run Delay (UBaR)
P4L8 sets the number of seconds that a phase unbalance above UBA
must be maintained before an alarm occurs.
5.5 Page 5, SP STaRT, Settings P5L1 to P5L12
Page 5 contains the settings that control motor starting and jogging
functions.
5.5.1 Setting P5L1, Starts Per Time allowed (ST/T)
P5L1 sets the maximum number of motor starts permitted within the
time set in P5L2 described in the next subsection. To disable this func-
tion, set P5L2 to OFF.
Page 5-6
MP-3000
The record of recent start times is kept in a memory stack. The oldest
starts in the memory are deleted as they age beyond the time limit set
in P5L2. If the maximum number of starts is reached within the set
time window, the relay raises an alarm with STEX A on the display.
To observe the per time limiting values, check the remaining starts
(RMST) and time until start (TUS) displays on the monitor page.
After the motor stops, the MP-3000 trips with the message STEX XXX,
where XXX is the number of minutes before the oldest start is deleted
from the memory stack, allowing the motor to start. XXX can be ob-
served to count down as the motor sits idle.
5.5.2 Setting P5L2, Time allowed for Starts Count (T/ST)
P5L2 sets the number of minutes within which the maximum number
of starts cannot be exceeded. This function can be set to OFF.
5.5.3 Setting P5L3, Time Between Starts (TBS)
P5L3 sets the time in minutes that must expire from one start until the
next is permitted. This function can be set to OFF.
5.5.4 Setting P5L4, Number of Cold Starts allowed (NOCS)
P5L4 sets the number of cold starts allowed from one to five. Most
motors can tolerate some number of consecutive cold starts before the
time between starts is enforced. The MP-3000 treats a start as the first
in a sequence of cold starts if the motor has been stopped for at least
the time period which is the greatest of:
• Setting P5L2, Time Allowed For Starts Count (T/ST)
• Setting P5L3, Time Between Starts (TBS)
• One hour.
Subsequent starts are treated as additional cold starts in the same
sequence, only if they follow the previous start by 10 minutes or less,
until the set number of cold starts is reached. Starts after this are
subject to time and count limits imposed by settings P5L1 through
P5L3 above.
5.5.5 Setting P5L5, Motor Start Transition Current Level (TRNC)
P5L5 sets the current level defining the transition from the START to
the RUN state. This setting, along with settings P5L6 and P5L7, deter-
mine when the MP-3000 declares a transition from START to RUN.
The TRNC setting must be greater than the Stop Current Threshold
(STOP XX, P1L9) setting. Remember that the Stop Current Threshold
is programmed as a percentage of PCT. To convert this setting to be a
percentage of fLa, multiply the Stop Current Threshold by PCT/fLa.
5.5.6 Setting P5L6, Motor Start Transition Timeout (TRNT)
P5L6 sets the maximum duration of the START state of the motor
before transition to RUN. Refer to P5L7 in the next subsection for
further details.
5.5.7 Setting P5L7, Transition on Event (TRN TIME, TRN I,
TRN T+C, or TRN T/C)
This setting is used with P5L5 and P5L6 to determine what events
must happen for the MP-3000 to declare a transition from START to
RUN. Select one of four choices:
TRN TIME—Transition to RUN after time setting (P5L6) only. Ignore
current.
TRN I—Transition when starting current drops below setting (P5L5)
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