Eaton MP-4000, Инструкция по установке, эксплуатации и техническому обслуживанию

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Page 5-8 www.eaton.com
IB02602002E MP-4000
REM TRIP - Remote Trip - When voltage is applied, the MP-4000 trips
the motor and displays the message “REMOTE”. The trip resets only if
the input voltage is removed
.
DIF TRIP - Differential Trip - When voltage is applied, the MP-4000
trips the motor and displays the message “DIF TRIP”. This is used with
an external motor differential relay whose trip contact is normally open,
but closes when it detects a fault. The trip can be reset only after the
voltage is removed. It can be used for tripping by any auxiliary function
with a normally-open contact.
MTR STOP - Motor Stop Detection Blocking - With this setting, a
voltage input to DI 1 keeps the MP-4000 in the RUN mode, even when
the motor current drops below 100 mA secondary. This feature is used
mainly with a synchronous motor operating as synchronous condenser,
for power factor correction. The current may approach zero during
normal sustained operation.
RST DBl - Reset Disable - With this setting, the MP-4000 front panel
Reset pushbutton is disabled following a trip or alarm condition. The
only way to reset the unit is to apply voltage to DI 1. This feature pre
-
vents unauthorized personnel from resetting the relay or restarting the
motor after a trip. Use a secure reset contact to apply voltage to DI 1
.
EMG OVR - Emergency Override -
The DI 1 input will mimic the func
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tionality of the Emergency Override pushbutton.
5.7 Page 7, SP DI 2
This page contains the single setting which configures Discrete Input
2 (DI 2). The input must be a 120 Vac signal. A 120 Vac source for
wetting dry contacts is provided on the MP-4000 terminal block. Refer
to the wiring diagrams in Section 6.
5.7.1 Setting P7l1 (INC SEQ, REM RST, REM TRIP, DIF TRIP,
MTR STOP, RST DBl, or EMG OVR)
If the incomplete sequence function INSQ is on and set for some time
delay (setting P5L8), DI 2 is automatically configured to control incom
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plete sequence timing, INC SEQ, and no other setting is possible.
If INSQ is turned OFF, the other choices for DI 2 are available. These are
the same choices as for Discrete Input 1, P6L1, covered in Subsection
5.6.1.
5.8 Page 8, SP aREl, Settings P8l1 to P8l22
Use Page 8 to configure which events activate the alarm relay.
The factory default setting is for every alarm event to activate the alarm
relay, and for the alarms to reset automatically when the condition
disappears. Trip events do not activate the alarm relay; nor does Time
Between Starts blocking, which frequently goes true during normal op
-
erating cycles. Check the settings to be sure they agree with the factory
defined values (the Values as Shipped column in Table 4.3) or change
them as needed.
NOTICE
EVEN ThOUGh a PaRTICUlaR alaRM CONDITION IS DIRECTED
TO ThE alaRM RElay ON ThIS PaGE, IT CaN FUNCTION ONly
IF IT IS TURNED ON IN ThE SP alaRM PaGE 4.
Settings control the following 22 alarm assignments. Any or all can be
turned OFF:
Ground fault alarm, or trip;
I2T alarm, or trip;
Jam alarm, or trip;
Underload alarm, or trip;
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Phase unbalance alarm, or trip;
Winding temperature alarm, or trip (with URTD);
Motor bearing temperature alarm, or trip (with URTD);
Load bearing temperature alarm, or trip (with URTD);
Auxiliary temperature alarm, or trip (with URTD);
Starts per time alarm, or trip;
Time between starts trip;
Individual RTD channel failure alarm;
URTD overall communications failure alarm;
IOC trip;
Phase reversal trip;
Incomplete sequence trip;
Remote trip (via discrete input);
Differential trip;
INCOM (data communications) trip;
Transition trip;
Zero speed switch trip; and
Trip bypass (contactor fails to interrupt current after trip).
5.9 Page 9, SP aUX1, Settings P9l1 to P9l25
Use Page 9 to configure the events that will activate the AUX1 output
relay. It also includes the three settings to configure the load shedding
function.
The factory default setting is for a thermal trip (I2T trip) only to activate
this relay. Many Users choose to change this. If the load shed func
-
tion is turned on, using settings P9L1 to P9L3 as explained, the relay
AUX1 is dedicated to this function and other uses are not available or
visible.
The load shed function provides a contact output signal that the User
connects to the process equipment, to reduce loading on the motor
if it becomes too large. For example, the contact might be used to
temporarily stop the flow of heavy materials onto a conveyor driven
by the protected motor. In this way, the MP-4000 tries to alleviate an
overload before it reaches an outright thermal protective trip. When
the load is reduced, the contact returns to the normal state and the
process can resume loading of the motor.
The load shed function, which is active only during the RUN state of
the motor, is configured with settings P9L1, P9L2, and P9L3.
5.9.1 Setting P9l1, load Shed Pickup Current (lSPU)
P9L1 sets current level above which the load shed output is activated
.
5.9.2 Setting P9l2, load Shed Dropout Current (lSDO)
P9L2 sets the current level below which the load shed output is deac
-
tivated .
5.9.3 Setting P9l3, load Shed Delay (lSDl)
P9L3 sets both the pickup and dropout delays in seconds for the load
shed output. That is, it sets the time for which the current must be
above LSPU before the output is activated. It also sets the time for
which the current must be below LSDO before the output is
deactivated.
The LSPU and LSDO settings are forced to be coherent:
If the User sets either to OFF, the other is automatically set
to OFF as well.
If LSPU is set to any pickup value with LSDO OFF, LSDO is
set to its minimum on-setting, 50 percent of FLA. The User
can set it to a different value if desired.
If LSDO is set to any dropout value with LSPU OFF, the
LSPU is set to its maximum value, 150 percent of FLA. The
User can set it to a different value if desired.
LSPU must be greater than LSDO. The setting range of
either may be limited to enforce this .
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