Category: Eaton

The protection functions are listed below:

• I2t overload protection (49/51)

• Locked rotor (49S/51)

• Ultimate trip current (51)

• Current unbalance (46)

• Instantaneous overcurrent (50)

• Ground fault protection (50G)

• Undervoltage (27)

• Overvoltage (59)

• Under power (32)

• Voltage unbalance (47)

• Power factor (55)

• 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)

• Fail-safe or non-fail-safe trip modes

The metering functions are:

• Metering:

− Average current (I Ave)

− Amperes: magnitude and angle in primary values

− Amperes: positive, negative, and zero sequence

− Average voltage (V Ave)

− Voltage: magnitude and angle

− Voltage: positive, negative, and zero sequence

− Percent of full load

− Percent current unbalance

− Percent voltage unbalance

− Power, vars, and VA

− Power factor

− Frequency

− Energy metering with time and date stamps

• RTD temperatures:

− Individual winding

− Motor bearing

− Load

− Auxiliary temperatures

• Motor conditions:

− Percent of I2t thermal bucket

− Time before start

− Remaining starts allowed

− Oldest start time

MP-4000 motor relay

The MP-4000 motor relay is generally used on

a motor starter or a breaker used for a motor

load. The MP-4000 motor relay provides the

intelligence to protect and control the motor

against abnormal operating conditions. It monitors

the currents from either a 5A or a 1A secondary

of a CT circuit. Ground current may be obtained

from either a ground CT or from the residual

connection of the phase CTs. It provides a Form C

contact output for controlling the starter contacts

or breaker operation.The protection functions are listed below:

• I2t overload protection (49/51)

• Locked rotor (49S/51)

• Ultimate trip current (51)

• Current unbalance (46)

• Instantaneous overcurrent (50)

• Ground fault protection (50G)

• Undervoltage (27)

• Overvoltage (59)

• Under power (32)

• Voltage unbalance (47)

• Power factor (55)

• 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)

• Fail-safe or non-fail-safe trip modes

Product description

• Microprocessor-based, multifunctional

motor protection

• Intel-I-Trip overload protection based on

motor data

• Event recording and operational logging

• Motor start profile

• Optional quick release drawout case

• Used on AMPGARD and medium

voltage assemblies

• “Help” menu provides user

operational assistance

The MP-4000 motor relay provides start control

logic to protect the motor against excessive starts

or starting the motor before it has had sufficient

time to cool down. The MP-4000 motor relay

may be applied to either across-the-line starters

or reduced-voltage starters. On reduced-voltage

starters, the MP-4000 relay can control the switch

from reduced voltage to full voltage based on time

and/or motor transition. The MP-4000 can protect

the starter against failure to transition to full volt

age through contact feedback and an incomplete

sequence function.

Application description

The Cutler-Hammer MP-4000 motor protection

relay by Eaton Corporation is a multifunctional

microprocessor-based protective relay for the

protection of three-phase AC motors. The

MP-4000 motor relay may be applied to any size

motor at any voltage level. It is most commonly

used on large, medium voltage three-phase induc

tion motors. It has also been widely used on

important low voltage (480V) motor applications

and synchronous motors.

The MP-4000 motor relay monitors three-phase

and ground currents and three-phase voltages.

It provides motor overload, stall, short circuit,

phase unbalance, single phasing over/undervolt

age, underpower, power factor, and ground fault

motor protection.

It can also be used to provide protection for a load

jam or loss of load condition.

The MP-4000 motor relay provides start control

logic to protect the motor against excessive starts

or starting the motor before it has had sufficient

time to cool down. The MP-4000 motor relay

may be applied to either across-the-line starters

or reduced-voltage starters. On reduced-voltage

starters, the MP-4000 relay can control the switch

from reduced voltage to full voltage based on time

and/or motor transition. The MP-4000 can protect

the starter against failure to transition to full volt

age through contact feedback and an incomplete

sequence function.

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

• Designed to mount directly to a range of general purpose HART®

connection units and IS backplanes

• Provides a simple interface to smart devices in the field

• Connect up to 7936 HART® devices on a single RS485 network

• LED indication for fault diagnosis

• Auto baud rate detection

• Connectivity to HART® configuration and Instrument Management

software (IMS)

The MTL4851 and MTL4852 HART connection system provides a simple

interface between smart devices in the field, control systems and HART

instrument management software run on a pc.

The system is based on 16-channel modularity to provide a compact,

easily configurable and expandable system. Using a standard RS485 serial

link up to 7936 HART devices can be connected on a single network.

For the optimum solution, choose from a range of general purpose

and IS termination boards. For maximum flexibility the HMM64 HART

backplane locates an MTL4851 master communications module and

up to three MTL4852 secondary interface modules, with each module

connecting to 16 field devices. General purpose HART connection units

and IS backplanes are available fitted with an cable interface connection

to the HMM64. This system can be extended with further HMS64 HART

backplanes linked to the master, each carrying up to four MTL4852

secondary interface modules.

Connectivity to HART Configuration and Instrument Management

Software :

The online access to the information contained within HART devices

allows users to diagnose field device troubles before they lead to costly

problems. Software can capture and use diagnostic data from HART

field instruments via the MTL HART connection hardware. This allows

users to realise the full potential of their field devices to optimise plant

assets, which results in significant operations improvement and direct

maintenance savings.

IMS products provide essential configuration, calibration, monitoring

and maintenance history functions for conventional analogue (4-20 mA)

and HART protocol compatible smart process instruments and field

devices. They deliver powerful tools to meet the need for standardised

instrument maintenance procedures and record keeping mandated by

some quality standards and regulatory bodies.

The MTL4851 and MTL4852 modules can also be located on HTP

SC16x termination boards for general purpose applications. HART loops

are simply wired through these HART Termination Panels and may be

grounded or floating circuits. The HTP boards offer a compact and cost

effective solution for general applications. CPH-SC16x backplanes are

ideal for signal loops requiring intrinsic safety (IS) protection, combining

multiplexer and IS isolator mounting. This offers considerable simplification

in wiring when compared to DIN-rail based solutions.

The HCU16 HART units connect to 16 general purpose field instruments

while maintaining channel to channel isolation. Resistor conditioning

options are compatible with all types of I/O cards. It allows pass-through

connections for transmitter power supply, input signal and common.

The HCU16AO unit includes HART filters for use with I/O cards that are

incompatible with HART communication signals.

Customised backplanes and connection units are available to provide

direct connection from DCS I/O cables, replacing the standard termination

boards.

The benefits of utilising these powerful software packages online

include:

• Reduced commissioning time and costs

• Reduced maintenance costs

• Reduced documentation

• Reduced process downtime

The MTL485x offers connectivity to a comprehensive range of FDT

based software packages via the comms Device Type Manager (DTM).

The DTM can be downloaded from www.mtl-inst.com. Other software

packages, such as AMS from Emerson, work with the MTL485x through

custom software drivers or by the inclusion of the device description (DD)

file for the MTL multiplexers.

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 .