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I.L. 17562
PR 0.3 Effective 8/99
This protection is
always
useful, but is essential if the Long Acceleration Time (LAT) function set
by P5L10 is used.
Note that if the ZSW function is set to ON, then Discrete Input 1 is automatically configured to be
the zero speed switch input. All other alternate function settings for Discrete Input 1 (P6L1) are
suppressed and not visible until ZSW is set to OFF.
With ZSW ON, the MP-3000 checks Discrete Input 1 for voltage at the very moment it sees a
start - it wants to see the initially closed zero-speed switch, which opens shortly thereafter as the
motor spins. If it fails to find the closed contact, it trips immediately with a zero-speed switch trip
message. Check the wiring and contact for problems.
5.5.12 Setpoint P5L12, Anti-Backspin Delay Time (ABKS) —
Sets the time in minutes before
a motor restart is permitted after a trip or stop condition. This function can be set to OFF.
This function is used with a motor driving a pump working into a head, or any other load which
tends to spin in a reverse direction (backspin) when the motor is de-energized. It blocks starting
during the time when the motor might be rotating in reverse following a trip. Also, this function
may be used simply to set idle time (time between stop and start) before a restart is permitted.
5.6 Page 6, SP DI 1, —
This page contains the single setpoint which configures Discrete Input 1
(DI 1). The input must be a 120 Vac signal. A 120 Vac source for wetting dry contacts is
provided on the MP-3000 terminal block for convenience. Refer to wiring diagrams in Section 6.
5.6.1 Setpoint P6L1 (REM RST, REM TRIP, DIF TRIP, MTR STOP, RST DBL, EMG OVR, or
ZERO SW)
If the zero speed switch (ZSW) function is ON in the SP START page (P5L11), then
this DI 1 input is automatically configured to be zero speed switch contact input, ZERO SW, and
no other setting option is visible.
If ZSW is set to OFF, then the available choices for Discrete Input 1 are:
REM RST - Remote Reset — When voltage is applied, the MP-3000 resets its active functions
and displays, just as if the reset pushbutton on the faceplate were pressed.
REM TRIP - Remote Trip — When voltage is applied, the MP-3000 trips the motor and displays
the message “REMOTE”. The trip will reset only if the input voltage is removed.
DIF TRIP - Differential Trip — When voltage is applied, the MP-3000 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. 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 will keep
the MP-3000 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-3000 front-panel Reset pushbutton is
disabled following a trip or alarm condition. The only way to reset the unit is by applying voltage
to DI 1. This feature prevents 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 — On DI 1 voltage input, the MP-3000 will perform as if the
emergency override pushbutton were pressed.
Содержание 66D2032G01
Страница 18: ...Page 18 I L 17562 PR 0 3 Effective 8 99 Figure 4 1 MP 3000 Pushbuttons...
Страница 19: ...I L 17562 Page 19 PR 0 3 Effective 8 99 Figure 4 2 MP 3000 LED Indicators...
Страница 72: ...Page 72 I L 17562 PR 0 3 Effective 8 99 Figure 6 1 Panel Cutout Dimensions...
Страница 73: ...I L 17562 Page 73 PR 0 3 Effective 8 99 Figure 6 2 Faceplate Dimensions...
Страница 74: ...Page 74 I L 17562 PR 0 3 Effective 8 99 Figure 6 3 MP 3000 Case Depth Dimensions...
Страница 75: ...I L 17562 Page 75 PR 0 3 Effective 8 99 Figure 6 4 Universal RTD Module Mounting Dimensions...
Страница 76: ...Page 76 I L 17562 PR 0 3 Effective 8 99 Figure 6 5 Rear Panel Terminals...
Страница 77: ...I L 17562 Page 77 PR 0 3 Effective 8 99 Figure 6 6 Typical Ct Circuits and Motor Control Wiring...
Страница 78: ...Page 78 I L 17562 PR 0 3 Effective 8 99 Figure 6 7 Typical ac Supply and URTD Wiring...
Страница 79: ...I L 17562 Page 79 PR 0 3 Effective 8 99 Figure 6 8 Alternatives for Discrete Input Wiring...
Страница 80: ...Page 80 I L 17562 PR 0 3 Effective 8 99 Figure 6 9 RTD Wiring to URTD Module...
Страница 88: ...Page 88 I L 17562 PR 0 3 Effective 8 99 Figure 8 1 System Overview Figure 8 2 Torques from Sequence Currents...
Страница 100: ...Page 100 I L 17562 PR 0 3 Effective 8 99 Figure 9 1 Rotor Temperature Tracking...
Страница 101: ...I L 17562 Page 101 PR 0 3 Effective 8 99 Figure 9 2 Motor Protection Curve...
Страница 102: ...Page 102 I L 17562 PR 0 3 Effective 8 99 Figure 9 3 Underload Jam Protection Curve...
Страница 103: ...I L 17562 Page 103 PR 0 3 Effective 8 99 Figure 9 4 Motor Protection Curve Example without RTDs...
Страница 104: ...Page 104 I L 17562 PR 0 3 Effective 8 99 Figure 9 5 Motor Protection Curve Example with RTDs...
Страница 105: ...I L 17562 Page 105 PR 0 3 Effective 8 99 Figure 9 6 Motor Start and Run Cycles...
Страница 109: ...I L 17562 Page 109 PR 0 3 Effective 8 99 P5L8 40 Incomplete Sequence time 1 60s OFF 1 240s...