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Page 1-1
IL17562BH04Effective 10/02
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 and reverse phase
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)
•I
2
t 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
• Differential trip input
• Emergency override clears blocks to motor restarting (if enabled)
• Program settings while motor runs, with controlled changeover (if
enabled)
• Disarmed mode for commissioning and checking in a running
process.
1.1 Replacing the IQ1000 II with MP-3000
The MP-3000 Motor Protection Relay has been designed to serve as a
direct replacement for the prior-generation Westinghouse or Cutler-
Hammer IQ 1000 II. The cutout and mounting are compatible. The
relay terminal configuration and wiring connections are similar except
for the wiring of the two discrete inputs.
CAUTION
TERMINAL 6 (SEE FIGURE 6.3) WAS REMOTE COMMON IN THE
IQ1000II. THIS TERMINAL PROVIDED A CONNECTION TO
NEUTRAL IF 120 VAC CONTROL POWER WAS USED, AND A 120
VAC SOURCE IF 240 VAC CONTROL POWER WAS USED. THE
IQ1000 II HAD A FACTORY INSTALLED JUMPER BETWEEN
TERMINAL 6 AND TERMINAL 9—THE COMMON RETURN OF THE
DISCRETE INPUT CHANNELS. DO NOT INSTALL THIS JUMPER
ON THE MP-3000. THE MP-3000 USES TERMINAL 6 FOR DIS-
CRETE SOURCE AND IT IS A CONNECTION TO 120VAC IN BOTH
CASES OF 120VAC AND 240VAC CONTROL POWER USE. REFER
TO SECTION 6, INSTALLATION AND WIRING FOR PROPER
WIRING OF THE DISCRETE INPUTS.
The IQ 1000 II had a dedicated output assigned for the transition
function and a discrete input assigned for incomplete sequence on
transition. The MP-3000’s inputs and outputs are user configurable for
a variety of functions. If the Transition and Incomplete Sequence
functions are enabled, then the input and output corresponding to the
IQ 1000 II configuration is assigned to these functions exclusively.
These settings will keep the same wiring connections when replacing
the IQ1000II with an MP-3000. If the IQ 1000 II communicated with a
host computer, see section 10 for guidance on keeping IQ 1000 II data
communications.
1.2 MP-3000 Enhancements
The MP-3000 Motor Protection Relay incorporates the field proven
motor thermal models and sequence component measurement
techniques that were pioneered in the IQ 1000 and IQ 1000 II relay
thermal models. However, the MP-3000 adds over 50 enhancements
and new features. In addition, the new relay has new hardware with
more computational power, more data storage capability, and greater
immunity to electrical noise, voltage surges, and supply dips or
interruptions. Other significant enhancements and new features
include:
1. The MP-3000 Motor Protection Relay is now recognized to UL
1053 Standards for Ground Fault Protection Devices.
2. New power supply that can operate continuously at 55% of
nominal supply voltage, and can ride through a voltage sag or
loss for 30 cycles without dropping out and taking the motor off
line.
3. Optional Quick Release Drawout Case that makes removal and
replacement fast and easy.
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