Category: GE

Two-Speed Motor Protection

The two-speed motor protection feature

allows for the protection of motors that

can operate at two different speeds and

have different full load capacity levels at

each speed. This feature can be used on

motors that have two sets of windings

on each stator, where each set is used to

operate the motor at a different speed.

Underpower Protection

The underpower protection feature

provides for sensitive detection of a

loss of load condition.  The underpower

protection element can be more sensitive

for detecting loss of load conditions

caused by process-related problems than

is possible using a standard undercurrent

element.

Reduced Voltage Starting

The reduced voltage starting feature

provides the controls for signaling the

motor to switch over from a reduced

voltage (that is used during startup) to the

full voltage for motor running operation.

This feature can issue the command

to switch to full operating voltage, by

detecting: a) if the motor load has reached

a preset current level, or b) if a time delay

has elapsed (after starting), or c) both of

these conditions combined.

Two-Speed Motor Protection

The two-speed motor protection feature

allows for the protection of motors that

can operate at two different speeds and

have different full load capacity levels at

each speed. This feature can be used on

motors that have two sets of windings

on each stator, where each set is used to

operate the motor at a different speed.

Underpower Protection

The underpower protection feature

provides for sensitive detection of a

loss of load condition.  The underpower

protection element can be more sensitive

for detecting loss of load conditions

caused by process-related problems than

is possible using a standard undercurrent

element.

Reduced Voltage Starting

The reduced voltage starting feature

provides the controls for signaling the

motor to switch over from a reduced

voltage (that is used during startup) to the

full voltage for motor running operation.

This feature can issue the command

to switch to full operating voltage, by

detecting: a) if the motor load has reached

a preset current level, or b) if a time delay

has elapsed (after starting), or c) both of

these conditions combined.

Start Inhibit

The start inhibit function prevents the

starting of a motor when the motor is too

hot and does not have a sufficient amount

of thermal capacity available to allow a

start without being tripped offline.

Breaker Failure Protection

The breaker failure protection element

monitors for timely operation of the

connected breaker. If a trip command is

not successful in operating the breaker

and clearing the fault, the breaker failure

element can be used to send trip signals to

upstream breakers to clear the fault.

Undercurrent Protection

The undercurrent protection element

provides the ability to trip the motor due

to external conditions that can cause the

load being pulled by the motor to drop

below a preset level.  This element is useful

when the loss of the load results in a loss

of cooling which will cause the asset to

overheat.

Under/Over Frequency Protection

The under/over frequency protection

element detects when the motor is

operating at off-nominal frequencies

(which can damage the process) or signals

to upstream protection or control to

implement load-shedding actions.

RTD Protection (Module Option 5C)

The M60 RTD option provides 8

programmable RTD inputs per module that

are used for monitoring the stator, bearing

and ambient temperatures. Each RTD input

has 2 operational levels: alarm and trip. The

M60 supports RTD trip voting and provides

open RTD failure alarming. Alternatively,

a remote RTD module “RRTD”, which

supports 12 RTD inputs, can also be used

with the M60 for temperature monitoring.

The RRTD provides cost savings compared

with standard RTD wiring.

Undercurrent Protection

The undercurrent protection element

provides the ability to trip the motor due

to external conditions that can cause the

load being pulled by the motor to drop

below a preset level.  This element is useful

when the loss of the load results in a loss

of cooling which will cause the asset to

overheat.

Under/Over Frequency Protection

The under/over frequency protection

element detects when the motor is

operating at off-nominal frequencies

(which can damage the process) or signals

to upstream protection or control to

implement load-shedding actions.

RTD Protection (Module Option 5C)

The M60 RTD option provides 8

programmable RTD inputs per module that

are used for monitoring the stator, bearing

and ambient temperatures. Each RTD input

has 2 operational levels: alarm and trip. The

M60 supports RTD trip voting and provides

open RTD failure alarming. Alternatively,

a remote RTD module “RRTD”, which

supports 12 RTD inputs, can also be used

with the M60 for temperature monitoring.

The RRTD provides cost savings compared

with standard RTD wiring.

Start Inhibit

The start inhibit function prevents the

starting of a motor when the motor is too

hot and does not have a sufficient amount

of thermal capacity available to allow a

start without being tripped offline.

Breaker Failure Protection

The breaker failure protection element

monitors for timely operation of the

connected breaker. If a trip command is

not successful in operating the breaker

and clearing the fault, the breaker failure

element can be used to send trip signals to

upstream breakers to clear the fault.

Undercurrent Protection

The undercurrent protection element

provides the ability to trip the motor due

to external conditions that can cause the

load being pulled by the motor to drop

below a preset level.  This element is useful

when the loss of the load results in a loss

of cooling which will cause the asset to

overheat.

Mechanical Jam

The mechanical jam element senses

increased loading associated with

process or load related faults such as an

overloaded conveyor. A programmable

delay setting can be used to allow the

process to attempt to clear itself before

issuing a trip.

Acceleration Time

The M60 protects the motor from

overheating in cases of abnormal

loading during motor starts. The motor

can be tripped if the motor does not

reach a running condition within the

programmable motor acceleration time.

Stator Differential

The M60 provides stator differential

protection for fast clearing of stator phase

faults. Advanced CT saturation detection

algorithms and dual-slope characteristics

are incorporated for increased security

during heavy faults.

Short Circuit Protection

Short circuit overcurrent protection

protects damage to the motor during a

locked rotor condition. The M60 comes

with up to 8 instantaneous overcurrent

elements that can be configured for

protection, alarming, and control during

locked rotor conditions.

Protection and Control

The M60 motor protection system offers

comprehensive protection and control

solutions for medium to large-sized

three-phase motors.  The M60 includes

advanced automation and communication

capabilities, extensive I/O options, and

powerful fault recording features that can

simplify postmortem fault analysis and

help minimize motor downtime. As part

of the Universal Relay (UR) family, the M60

provides superior protection and control

that includes:

Motor Thermal Model

The M60 features an enhanced motor

thermal model consisting of the following

elements:

• Thermal limit curves – NEMA standard,

voltage dependent and customized

• IEC 60255-8 thermal overload curves

• Current unbalance biasing

• Independent running and stopped

exponential cooling curves

• Optional RTD biasing of the thermal

model to adapt to real-time

temperature measurements

• Compensation for hot/cold motor

conditions

The M60 thermal model integrates both

stator and rotor heating and cooling into

a single model.

FlexCurves™

For applications that require greater

flexibility, FlexCurves can be used to define

custom curve shapes. These curves can

be used to protect motors with different

rotor and stator damage curves, allowing

complete protection over the total motor

capacity.

Overtemperature Protection

The M60 supports up to 16 programmable

RTD inputs that allow for the configuration

of the alarm and trip temperature of each

RTD, detecting RTD shorting conditions,

and selecting RTD voting that requires

more than one RTD to detect an over

temperature condition before it will issue a

trip command.

Communications

• Networking interfaces: up to three Ethernet ports 100Mb fiber or

copper, RS485. RS232. RS422. G.703. C37.94

• Multiple protocols: IEC 61850. DNP 3.0 and Modbus® serial/TCP,

IEEE 1588. IEC 60870-5-104 and 103. PRP, SNTP, HTTP, TFTP, EGD

• DeviceNet and Profibus protocol options available using the D485

and P485 protocol convertors

• Direct I/O: secure, high-speed exchange of data between URs for

direct transfer trip (DTT) applications

IEC 61850 Process Bus Interface

• Robust communications with up to 8 HardFiber Bricks

• Redundant architecture for dependability and security

EnerVista Software

• Graphical Logic Designer and Logic Monitor to simplify designing

and testing procedures via EnerVista UR Engineer

• Service and update notification toolset ensures device documents

and software are up-to-date via EnerVista Launchpad

• EnerVista Integrator providing easy integration of data in the M60

into new or existing monitoring and control systems

APPLICATIONS

• Protection and control of most popular construction type

medium to large thee-phase induction motors

• Automation or process control functionality

• Protection of medium to large synchronous motors when paired

with the SPM Synchronous Motor Protection System

• Stand-alone protection or component in automated substation

control system

FEATURES

Protection and Control

• Enhanced thermal model with RTD and current unbalance

compensation

• Stator differential

• Mechanical jam/stall

• Short circuit tripping

• Under current/under power

• Phase reversal

• Reverse/low forward power protection

• Two-speed motor protection

• Reduced voltage starting

• Optional internal RTDs & external RTD module

• CT failure for each CT bank, VT fuse failure

Monitoring and Metering

• Metering: current, voltage, power, energy, frequency

• Advanced recording capabilities deliver a 1024 event recorder,

configurable and extended waveform capture and data logger

• Setting for security audit trails for tracking changes to M60

configurations

• Motor starting characteristics for the last 250 motor starts