IM02602002E
Page 5-4
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MP-3000
P2L1 species the temperature displays in degrees Celsius or degrees
Fahrenheit.
WD T species the motor stator winding temperature limit above which
the hottest winding RTD causes the relay to trip the motor. This trip can
also be set to OFF. Trip temperature values are in degrees C or F, de-
pending on Setting P2L1. There are six specically-labeled stator RTD
inputs on the URTD module whose readings can trigger this particular
type of trip. See Subsection 9.1.8 for setting advice.
.
Species the motor stator winding temperature limit above which any
winding RTD produces an alarm output from the relay. This alarm can
also be set to OFF. Alarm temperature values are in degrees C or F,
depending on Setting P2L1. There are six specically-labeled stator
RTD inputs on the URTD module whose readings can trigger this
particular type of alarm.
P2L4 species the motor bearing temperature limit above which either
of the two motor bearing RTDs causes the relay to trip the motor. This
trip can also be set to OFF. Trip temperature values are in degrees C
or F, depending on Setting P2L1. There are two specically-labeled
motor bearing RTD inputs on the URTD module whose readings can
trigger this particular type of trip.
P2L5 species the motor bearing temperature limit above which either
of the two motor bearing RTDs produces an alarm output from the
relay. This alarm can also be set to OFF. Alarm temperature values are
in degrees C or F, depending on Setting P2L1. There are two speci-
cally-labeled motor bearing RTD inputs on the URTD module whose
readings can trigger this particular type of alarm.
P2L6 species the load bearing temperature limit above which either of
the two load bearing RTDs causes the relay to trip the motor. This trip
can also be set to OFF. Trip temperature values are in degrees C or
F, depending on Setting P2L1. There are two specically-labeled load
bearing RTD inputs on the URTD module whose readings can trigger
this particular type of trip.
This setting species the load bearing temperature limit above which
either of the two load bearing RTDs produces an alarm output from the
relay. This alarm can also be set to OFF. Alarm temperature values are
in degrees C or F, depending on Setting P2L1. There are two speci-
cally-labeled load bearing RTD inputs on the URTD module whose
readings can trigger this particular type of alarm.
AX T species the auxiliary RTD temperature limit above which the
relay trips the motor. This trip can also be set to OFF. Trip temperature
values are in degrees C or F, depending on Setting P2L1. There is one
specically-labeled auxiliary RTD input on the URTD module whose
readings can trigger this particular type of trips.
This setting species the auxiliary RTD temperature limit above which
the relay produces an alarm output. This alarm can also be set to OFF.
Alarm temperature values are in degrees C or F, depending on Setting
P2L1. There is one specically-labeled auxiliary RTD input on the
URTD module whose readings can trigger this particular type of alarm.
P2L10 sets the RTD diagnostic alarm ON or OFF. If set to ON, the
relay alarms on any RTD failure or URTD communications failure.
This page contains the settings that congure the trip functions. Any
trip function can be turned off, as listed in Table 4.3. Start and run de-
lays are used to block these tripping functions for the set time to avoid
nuisance tripping:
Start delays - Begin when the MP-3000 rst sees motor
current and declares a START. The start delay completely
inhibits operation of the governed function for the set time
after the start. A single setting serves for both tripping and
alarming functions.
Run delays - Also known as pickup delays. These delays
prevent momentary disturbances in the system from causing
nuisance trips.
When the motor starts, all of the start delays begin timing. As
each start delay expires, the associated protection or alarm
function is enabled.
The pickup of a measurement element begins the timing of
its run delay, which must expire before the relay can actually
trip or alarm. Once the run delay timing has begun, the driv-
ing condition must remain for the full run delay time. If the
condition goes away and then returns during run delay tim-
ing, the run delay timer resets and begins timing over again.
Note that the transition of the motor or the MP-3000 relay
from START to RUN state has no bearing on any of these
time delays.
Assume the MP-3000 jam trip function (see Section 5.3.6) is set for a
start delay of 15 seconds and a run delay of 5 seconds. If the motor
is jammed at start, the jam function will not begin to time until after
the start delay. Therefore, the unit will not take action until 15 seconds
(start delay) plus 5 seconds (run delay), a total of 20 seconds. After the
run delay has timed out, the unit will provide protection in case of a jam
in 5 seconds based on the start delay only.
P3L1 sets the ground fault trip current pickup in percentage of ground
CT ratio numerator (CT rated primary current). For example, with a
50:5 ground fault CT and a setting of 24%, the GFT function picks up
at 24% of 50 A, or 12 A actual ground fault current in the motor. The
start and/or run delays must expire before the trip occurs.
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