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I.L. 17562
Page 3
PR 0.3 Effective 8/99
SECTION 1. INTRODUCTION
1.0 General
The MP-3000 is an advanced microprocessor-based motor protection relay that is easy to set up
and use. It monitors, controls and protects motors against overload, thermal damage to rotor or
stator, electrical faults, and excessive starting, and many process equipment failures. Advanced
algorithms and thermal models give safe operation over a wide range of conditions.
The MP-3000 protects 50 or 60 Hz three-phase motors of any size or voltage level. It can
protect induction or synchronous motors, with or without RTDs. It is frequently installed in motor
starters or switchgear.
The MP-3000 Motor Protection relay provides the following protection, alarm, and control
functions (ANSI device numbers in parentheses):
Protection
•
Intel-I-Trip
I
2
t Overload Protection (49/51)
•
Locked rotor protection (49S/51)
•
Ultimate trip current (51)
•
Negative sequence current/ phase unbalance protection (46)
•
Instantaneous overcurrent trip(50)
•
Ground fault protection (50G)
•
RTD trip with accessory URTD module (49/38)
•
Underload trip (37)
•
Starts per time limit (66)
•
Jam or stall trip (51R)
•
Zero-speed switch trip (14)
•
Auto or manual reset (86)
•
Fail-safe or non-failsafe trip modes
Alarming
•
Ground fault
•
I
2
t Overload
•
Jam / Stall
•
Underload
•
Phase unbalance
•
RTD temperature with URTD module
Control Features
•
Transition control for reduced voltage starters
•
Incomplete sequence (process feedback) detection and trip
•
Permits user-set number of cold starts
•
Limits number of starts per time
•
User sets minimum time between starts
•
Antibackspin (time from stop to next start) delay
•
Current-based process load shedding and restoration
•
Long acceleration timing feature
•
Motor stop input for synchronous motor and condenser applications
•
Remote trip input
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...