Eaton MP-3000 Motor Protection Relay

Mp-3000 motor protection

Applications

• Protection for three-phase AC motors

• Medium and large motors

• Motors with high inertia loads

• Motors with reduced voltage starting

Protection functions

• I2t overload protection (49/51)

• Locked rotor (49S/51)

• Ultimate trip current (51)

• Negative sequence phase unbalance (46)

• Instantaneous overcurrent (50)

• Ground fault protection (50G)

• RTD trip and alarm with URTD module (49/38)

• Underload trip (37)

• Starts per time (66)

• Jam or stall (51R)

• Auto or manual reset (86)

• Failsafe or non-failsafe trip modes

• Alarming

• Control

• History

Monitored values

• Motor currents

• RTD temperatures

• Motor conditions

Communications

• Optional interface capability to computer network for data

collection, storage and/or printout via the Cutler-HammerT

PowerNetE system

Physical characteristics

• User-friendly interface

• Large LED display

• Optional quick-release drawout case

• Height: 10 .25 inches (260 .4 mm)

• Width: 6 .72 inches (170 .7 mm)

• Depth: 2 .54 inches (64 .5 mm) without PONI, 4 .39 inches

(111 .5 mm) with PONI

Standards and certifications

• ULT recognized (file number E154862)

• UL 1053 recognized

• UL 508 recognized

• ANSI C37 .90. C37 .90 .1. C37 .90 .2

• CSAT

General description

Eaton’s Cutler-Hammer MP-3000 motor protection relay is a multi

functional microprocessor-based protective relay for the protection

of any size motor at all voltage levels . It is most commonly applied

on medium voltage or larger motors . The MP-3000 relay is a current-

only device that provides complete and reliable motor protection,

monitoring, and starting control functions .

The MP-3000 motor protection relay is available in either a fixed

mount, semi-flush case or in a semi-flush quick release drawout

case . Both housings are compact and fit a standard IQ cutout .

The optional quick release drawout case features two-stage contact

disconnects and self-shorting CT circuit terminal blocks . A spare self

shorting terminal pair is available for use as a relay removal alarm or

for continuous motor operation (non-failsafe mode) on relay removal .

The optional communication module is externally mounted on the

fixed mount case and internally mounted in the drawout case .

The MP-3000 motor protection relay has three-phase and one

ground current inputs . Both a 5A and 1A version are available . The

ground protection and metering functions can be used with either

a zero sequence ground CT or from the residual connection of the

phase CTs . The zero sequence ground CT provides greater ground

fault sensitivity than the residual connection . The unit is user-

programmable for 60 Hz or 50 Hz operation .

The MP-3000 motor protection relay has two discrete inputs, four

Form C (1 NO and 1 NC) contacts and one 4 to 20 mA analog

output . A fused source is available for the discrete inputs on the

MP-3000 . This eliminates additional control circuit wiring . The relay

provides maximum user flexibility to configure the I/O . All inputs

and outputs (except for the trip output) are user-programmable . In

addition, the relay has 10 LEDs for the indication of protection on,

program mode, monitor mode, view setting mode, history mode, log

mode, trip, alarm, auxiliary 1 and auxiliary 2 operation . Monitor mode

provides display indication of the discrete input states . The program

mode provides testing of the output relays, target LEDs, and

analog circuit .

A user-friendly operator interface and display provides quick access

to the settings, monitored values, motor history, and operational

logs . The large LED alphanumeric character display provides easy

viewing from any angle in any light . Simple keypad operation pro

vides quick and easy navigation through all settings and stored data .

The program mode and emergency override buttons are access

restricted via a seal and latched cover . An integrated help function

provides an online description display of functions, abbreviations,

and operations .

optimum motor protection

The MP-3000 motor protection relay has been designed for maxi

mum motor operation and protection . It permits running the motor

close to its design limits while protecting it against excessive

heating and damaging overload conditions . The MP-3000 field-

proven protection algorithms were developed based on motor

designs and operating parameters for optimum operation and

protection while minimizing nuisance tripping .

The MP-3000 motor protection relay utilizes a patented protection

algorithm and measurement technique based on proven positive

and negative (unbalance) sequence current sampling and true Rms

calculations .

Features

• Built-in help program

• Built-in test mode

• LED indication

• Microprocessor-based

• Self diagnostics

• Programmable binary inputs

• Programmable outputs

• Real-time clock