Eaton MP-3000 Instruction Leaflet page 37

5.3.2 Setting P3L2, Ground fault Start Delay (GfSD)
P3L2 sets the time from a motor start until the ground fault trip and
alarm functions are enabled, in power cycles. Use this to block GFT
operation until the ground current of power factor correction capacitors
decays after a start.
5.3.3 Setting P3L3, Ground fault Run Delay (GfRD)
P3L3 sets the number of power cycles that a ground fault trip or alarm
operation must be maintained before the relay produces an output.
5.3.4 Setting P3L4, Instantaneous Over current Trip Level (IOC)
P3L4 sets the instantaneous over current trip limit in percentage of FLA
above which the relay trips. This trip type can be set to OFF. For cur-
rents clearly above the setting, the IOC function picks up in two power
cycles or less. IOC operates only for high-current faults, and no run
delay is needed. Use this function with IOC Start Delay. Normally, set
IOC 1.5 times above LRC. Refer to Subsection 9.1.3.1.
The IOC setting must be below (1,130 * PCT/ FLA) or 1,600%, which-
ever is less. PCT is Setting P1L5; FLA is Setting P1L1. If this constraint
is exceeded, the program mode cannot be exited, but a specific warn-
ing message is displayed instead.
5.3.5 Setting P3L5, Instantaneous Over current Start Delay
(IOCSD)
P3L5 sets the number of power cycles after a start is recognized until
the instantaneous over current trip and alarm functions are enabled.
Use this delay to inhibit IOC tripping on a current peak caused by
magnetic inrush when the motor is first energized - usually two to three
cycles.
5.3.6 Setting P3L6, jam Trip Level (jMT)
P3L6 sets the motor jam current trip limit in percentage of FLA. This
element can be set to OFF. Use it with the jam start and run delays.
The jam trip function operates if the current rises well above FLA dur-
ing running, perhaps due to a mechanical jam in the load or a sudden
larger-than-intended load. For example, see the jam trip limits set at
180% of FLA in the upper RUN portions of the protection curves in
Figures 9.4 and 9.5.
The JMT setting must be below (1,130 * PCT/ FLA) or 1,200%, which-
ever is less. PCT is Setting P1L5; FLA is Setting P1L1. If this constraint
is exceeded, the program mode cannot be exited, but a specific warn-
ing message is displayed instead.
5.3.7 Setting P3L7, jam Start Delay (jMSD)
P3L7 sets the number of seconds after a start is recognized until the
jam trip and alarm functions are enabled.
Use JMSD to block jam trips during starting. Use even larger values in
high-inertia load situations where the acceleration time is longer than
the start time. In these cases, the motor current may remain above FLA
or JMT for some time after the transition from start to run.
5.3.8 Setting P3L8, jam Trip Run Delay (jMTR)
P3L8 sets the number of seconds that a jam trip current level must be
maintained before the trip output occurs.
Use JMTR to block undesired jam trips for temporary large loads that
are normal for the process. An example of this would be a heavy load
suddenly placed on a conveyor belt that the motor must accelerate.
MP-3000
5.3.9 Setting P3L9, Under load Trip Level (ULT)
P3L9 sets the current level in percentage of FLA below which the MP-
3000 determines that the motor has lost its load and trips the motor.
This element can be set to OFF. Use with the under load start and run
delays.
The Under load trip setting must be set at a value above the Stop Cur-
rent Threshold (STOP XX, P1L9) setting. Remember the Stop Current
Threshold is programmed as a percentage of PCT. To convert this
setting to a percentage of fLa, multiply the Stop Current Threshold by
PCT/fLa. For example, if a 1,000:5 CT was used with a motor that has
a full load current of 500 A, and a Stop Current Threshold of 5% was
programmed, the Under load Trip function must be set above 10% of
fLa.
5.3.10 Setting P3L10, Under load Start Delay (ULSD)
P3L10 sets the number of seconds after a start until the under load trip
and alarm functions are enabled.
5.3.11 Setting P3L11, Under load Trip Run Delay (ULTR)
P3L11 sets the number of seconds that current below the under load
trip setting must be maintained before a trip output occurs.
5.3.12 Setting P3L12, Phase Unbalance Trip Level (UBT)
P3L12 sets the percent of phase unbalance above which the relay
trips. This element can be set to OFF. The percent unbalance is calcu-
lated from the ratio of negative sequence current to positive sequence
current. Use with the phase unbalance trip start and run delays.
For reversing starter applications (see Setting P1L8), the MP-3000
assumes that the larger sequence current is the positive sequence
current, and can trip for unbalance with the motor turning in either
direction.
5.3.13 Setting P3L13, Phase Unbalance Start Delay (UBSD)
P3L13 sets the number of seconds after a start until the phase unbal-
ance trip and alarm elements are enabled.
5.3.14 Setting P3L14, Phase Unbalance Trip Run Delay (UBTR)
P3L14 sets the number of seconds that a high phase unbalance must
be sustained before a trip output occurs.
5.4 Page 4, SP aLaRM, Settings P4L1 to P4L8
This page contains the settings needed to configure the alarm func-
tions. Each alarm function can be disabled.
EVEN If aN aLaRM fUNCTION IS ENaBLED ON ThIS PaGE, IT
MUST aLSO BE DIRECTED TO aN OUTPUT RELay TO PRODUCE
CONTaCT OPERaTION fOR REMOTE OR aNNUNCIaTOR aLaRM-
ING. NORMaLLy (aND By faCTORy DEfaULT SETTINGS), ThE
CONDITIONS ShOULD aLL BE DIRECTED TO ThE aLaRM RELay
By ThE 22 SETTINGS ON PROGRaM MODE PaGE 8. ThEy May
aLSO BE SELECTIVELy DIRECTED TO ThE aUX1 aND/OR aUX
2 OUTPUT RELayS USING ThE SETTINGS ON PROGRaM MODE
PaGES 9 aND 10, RESPECTIVELy.
If the User configures an alarm here, but does not set it to activate any
output relay on Pages 8 to 10, alarm conditions still appear in all dis-
plays and logs, and in communications information sent to a PowerNet
host.
www.eaton.com
IM02602002E
NOTICE
Page 5-5