Archives

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.

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 theprocess 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.

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.

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.

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

IEC 61850 Process Bus Interface

• Robust communications with up to 8 HardFiber Bricks

• Redundant architecture for dependability and security

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

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

Comprehensive Protection for Medium to Large Motors

KEY BENEFITS

• Advanced motor protection and control elements including a

flexible and powerful thermal model and standard, custom and

voltage dependant overload curves

• Integrated automation and process control functions

• Simplified programming with the EnerVista™ M60 motor settings

auto-configurator

• Three independent fiber or copper Ethernet ports for simultaneous/

dedicated network connections with 1 microsecond time

synchronization via LAN with IEEE® 1588 support

•  Reduced relay-to-relay wiring and associated installation costs

through high-speed inter-relay communications

• Increase network availability by reducing failover time to zero

through IEC® 62439-3 “PRP” support

• CyberSentry™ provides high-end cyber security aligned to industry

standards and services (NERC® CIP, AAA, Radius, RBAC, Syslog)

• Robust network security enabling Critical Infrastructure

Protection through user command logging, and dual permission

access control

• High-end fault and disturbance recording

• Enhanced motor-learned data provides critical information for

preventative maintenance

• Complete IEC 61850 Process Bus solution provides resource

optimization and minimizes total P&C life cycle costs