469pres

469pres
Advanced Motor Management
“GE Multilin. . . The recognized leader in motor
protection and control with the most complete line
of motor protection solutions in the industry”
Modern Industrial Facility Requirements
for Motor Protection Systems
Protection
 Control
 Monitoring
 Metering

Communication
 Inputs & Outputs
 Ease of Use
 Reliability

1) Save 1st Cost and Project Cost ($$$)
2) Improve Protection (Asset Preservation & Safety)
3) Improve Tools for Operations (Process Continuity)
GE Consumer & Industrial
Multilin
2
Improving Industrial
Motor Protection Systems
Explore How GE-Multilin Protection, Control and
Software Solutions Can Help:
>
>
>
>
>
Improve Safety
Preserve Infrastructure
Diagnose Electrical Problems
Drive JIT/RCM Programs
Increase Dependability
– Security, Reliability, Simplicity
> Decrease Maintenance
> Facilitate Standardization
> Hasten Project Execution
GE Consumer & Industrial
Multilin
3
Industrial Electrical Protection Applications
Utility Lines
Utility
Interconnection
Transformer
Bus
Feeder
Generator
Motor
M
M
G
Motor
Loads
M
M
M
M
Loads
Loads
Loads
Various Industry
Motor Applications
•Fans, Blowers
•Pumps, Compressors
•Grinders, Chippers
•Conveyors, Elevators
•Crushers, Mixers
GE Consumer & Industrial
Multilin
5
What Fails?
Per 1985 EPRI & IEEE Surveys
•Bearings (40 - 50%)
•Stator (25 - 35%)
•Rotor (<10%)
•Other Failures
GE Consumer & Industrial
Multilin
6
Motor Electrical Protection
> Phase Fault
> Ground Fault
> Abnormal Operating Conditions
– Voltage
– Frequency
– Voltage and current imbalance
– Load loss
– Jamming
– Jogging
> Thermal Overload
– Process caused
GE Consumer & Industrial
– High ambient conditions
Multilin
7
Short Circuit Overcurrent Elements
•Phase Overcurrent (50)
– Used when contactor or breaker is rated for
fault interruption
– Not used for fused starters
•Residual Overcurrent (50N)
– Sum of phase CT currents, used on solidly
grounded motors
GE Consumer & Industrial
Multilin
8
Short Circuit Overcurrent Elements
•Ground Overcurrent (50N)
– Frequently, ground fault current is limited
by transformer neutral resistor, and a
separate low-ratio CT is warranted for
ground fault protection
• Detect motor and cable ground faults using
window CT with lower ratio for increased
sensitivity
GE Consumer & Industrial
Multilin
9
Abnormal Operating Conditions
> Load-Loss (37)
• Protection against pumps running dry,
belt/linkage breakage
> Load-Jam or Stall (39)
> Starts/Hour, Time Between Starts (66)
(antijogging protection)
> Current Unbalance Element (46)
• Negative sequence currents rapidly heat
stator when running at rated speed
GE Consumer & Industrial
Multilin
10
Abnormal Operating Conditions
• Phase Reversal Protection (46 or 47)
• Anti-Backspin Protection
GE Consumer & Industrial
Multilin
11
Abnormal Operating Conditions
•Undervoltage
•Overvoltage
•Underpower Element
•Power Factor Element
•Frequency Element
GE Consumer & Industrial
Multilin
12
Motor Mechanical - Bearings
> Lubricant issues
– Grade, contaminants, availability
> Mechanical
– Excessive radial loading, axial loading
> Rough surfaces
– Fatigue, cracks, shaft currents
> Vibration
– Unbalanced phase currents and harmonics
GE Consumer & Industrial
Multilin
13
RTD Uses
•Detect Winding Temperature
– Bias Thermal Model
•Detect Bearing Temperature
– Detect mechanical issues
•Detect Loss of Cooling Efficiency
– Cooling system failure
– High ambient temperature
> Other process variable
– Vibration
GE Consumer & Industrial
Multilin
14
Thermal Modeling
> Best way to prevent
short in motor is to
not overheat and
degrade the
insulation
> Repeated overheating
of motor insulation
causes cumulative
degradation
> Both the stator and
the rotor can be
overheated
ANSI C37.96-2000
GE Consumer & Industrial
Multilin
15
Current Imbalance
Derates Thermal Capacity
> Standing negative
sequence (current
imbalance) causes
heating in both the
stator and rotor
> Negative sequence
current caused by
voltage imbalance
across load (motor)
GE Consumer & Industrial
Multilin
16
Effect of Voltage
> Starting time sand
current are voltage
dependent
> Lower voltage
causes lower current
and lower torque,
therefore longer start
times
ANSI C37.96-2000
GE Consumer & Industrial
Multilin
17
Effect of
High Inertia
> High inertial starts tend
to use a lot of the
thermal capacity
available in a motor
> Difficult to coordinate
with single OC curve
ANSI C37.96-2000
GE Consumer & Industrial
Multilin
18
OL Curve Fitting
> Multiple OC curves
may be used to
attempt difficult
coordination, but OC
elements do not have
thermal memory
> Thermal memory is
needed for proper
modeling with multiple
starts
ANSI C37.96-2000
GE Consumer & Industrial
Multilin
19
Rotor Heating on Start Up
The thermal capacity of the
rotor cannot be measured
directly, but is rather
inferred from curves
supplied by the motor
manufacturing and
monitoring of current and
recent operating activity
GE Consumer & Industrial
Multilin
20
Rotor Resistance & Current
6
•Rotor Resistance
decreases as motor
approaches full speed
Full Load Amps (FLA - pu)
5
Current
(pu)
•The ratio is a 3:1
reduction
4
•The phenomena is the
result of the slip
frequency and the skin
effect of the current
traveling through the
rotor bar surface as the
frequency increases
3
Rotor
Resistance
(x0.01)
Torque
(pu)
2
1
0
0.2
0.4
0.6
0.8
% Synchronous Speed
1.0
GE Consumer & Industrial
Multilin
21
Heating Factors
•
Positive and negative sequence currents contribute to
heating during various operational modes of the motor
>
>
•
•
Starting: Effect for I1 and I2 is 3X the measured current
Running: Effect for I1 is 1X, and the effect for I2 is 5X the
measured current
These factors are derived from the rotor resistance and
the positive and negative sequence slips
These factors are taken into account when motor
damage curves are developed by the motor
manufacturer
>
>
Rotor heating is severe at locked rotor conditions
Locked rotor conditions can heat rotor at 108X running!
>
Stator heating increases due to unbalanced voltage supply to
the motor
GE Consumer & Industrial
Multilin
22
Presentation Overview
•
•
•
•
•
•
•
•
•
Key Benefits
Applications
Protection Features
Additional & Special
Features
Inputs & Outputs
Communications
Reliability
Connections
User Interface
• Metering & Monitoring
Features
• Event Log
• Reports
• Trending
• Waveform Capture
• Ordering Code
• Summary
• Going Forward
GE Consumer & Industrial
Multilin
24
Key Benefits
• Unique protection features - Comprehensive motor
protection, control and Monitoring
• Most advanced thermal model - Including multiple
RTD inputs for stator thermal protection
• Advanced monitoring functions - vibration, bearing
temperature
• Best in class man machine interface (MMI) - Large
backlit display with 40 characters to view relay
information and settings in direct sunlight, full
numerical keypad, and setpoint navigation keys.
GE Consumer & Industrial
Multilin
25
Key Benefits
• Minimize replacement time - Draw-out construction
• Complete asset monitoring - Temperature, Analog
I/O, full metering including demand & energy
• Reduce troubleshooting time and maintenance
costs – Event reports, waveform capture, data logger
• Simplify testing - Built in simulation features
• Filed upgradeable – Through flash memory
GE Consumer & Industrial
Multilin
26
Key Benefits
• Simplify testing - Built in simulation features
• Cost effective Access to information - Via Modbus
RTU protocol, through standard RS232 & RS485 serial
ports, and optional Modbus RTU over TCP/IP through
embedded Ethernet Port to connect to 10MB Ethernet
local or wide area networks.
• Long lasting life when exposed to chemically
corrosive and humid environments with optional
conformal coating
GE Consumer & Industrial
Multilin
27
Use the 469 to protect Large Induction
and Synchronous Motors
•
•
•
•
•
•
•
•
Fans
Pumps
Compressors
Milling
Crushers
Grinders
Conveyers
Shredders
•
•
•
•
•
•
•
Extruders
Chippers
De-barkers
Refiners
Blowers
Cranes
Chillers
GE Consumer & Industrial
Multilin
28
469 – Protection Features
• Thermal modeling of
stator and rotor
• RTD (Resistive Thermal
Device) and negative
sequence feedback
• Overload protection (15
standard curves plus
custom “FlexCurve™”)
• Voltage dependent curve
for rotor modeling during
long acceleration
• Adapts for hot or cold
starts
• Power factor with time
delays
GE Consumer & Industrial
Multilin
29
469 – Protection Features
• Differential
• Under & over, voltage &
frequency
• Start protection including:






Locked rotor
Acceleration timer
Starts/hour
Time between starts
Start inhibit
Restart block
•
•
•
•
•
Ground overcurrent
Short circuit
Unbalance
Single phase/phase reversal
Mechanical jam/rapid trip
GE Consumer & Industrial
Multilin
30
469 Application – Function Diagram
GE Consumer & Industrial
Multilin
31
Overload Protection
• Uses nameplate data to create thermal model
 Starts per hour
 Hot stall time
 Cold stall time
• Can learn cooling time with RTD input
• FlexCurve for difficult coordination
• Emergency start override for thermal model
GE Consumer & Industrial
Multilin
32
Overload Protection
• 15 Standard Curves
• FlexCurve
GE Consumer & Industrial
Multilin
33
Overload Protection
Negative sequence (current unbalance) biasing for
improved protection against rotor damage
> K = 8 is NEMA derating
GE Consumer & Industrial
Multilin
34
Overload Protection
Stator temperature biasing
for improved protection
against stator damage
when stator is hot
GE Consumer & Industrial
Multilin
35
Voltage Dependant Thermal Protection
The voltage dependent overload
curves are used in high inertia
load applications, where motor
acceleration time can actually
exceed the safe stall time and
motor thermal limits.
During motor acceleration, the
programmed thermal overload
curve is dynamically adjusted
with reference to the system
voltage level. The selection of the
overload curve type and the
shape is based on motor thermal
limit curves provided by motor
vendor.
GE Consumer & Industrial
Multilin
36
Additional and Special Features
•
•
•
•
•
•
•
•
•
•
•
•
Two speed motor protection.
Load averaging filter for cyclic load applications.
Reduced voltage starting supervision.
Variable frequency filter allowing accurate sensing and calculation of the
analog values in VFD applications.
Analog input differential calculation for dual drives applications.
Speed counter trip and alarm.
Universal digital counter trip and alarm.
Pulsing KWh and Kvarh output.
Trip coil supervision.
Drawout indicator, Setpoints Access and Test permit inputs.
Undervoltage auto restart (additional element per special order).
Experimental broken rotor bar detection system (additional element per
special order).
GE Consumer & Industrial
Multilin
37
469 – Inputs & Outputs
Inputs
Outputs
• Universal Power Supply • 5 electromechanical
(ac/dc)
output relays, 10 amp
continuous, 30 amp
• 3 phase CTs & VTs
make
&
carry
• Differential currents: 5 or
• 4 Assignable analog
1 amp
outputs
• 4 analog channel inputs
• 9 selectable logic inputs • 1 fail-safe self-test
GE Consumer & Industrial
Multilin
38
Communications
Protocols
• Modbus®RTU over Serial RS232 or RS485
Ports
• Modbus®RTU over TCP/IP via Ethernet Port
• DeviceNet
Man Machine Interface
Windows based EnerVista 469 Setup Software
allows access to:
• Actual Values
• Graphical trending
• Setpoints
• Setpoint programming
• Status
• Setpoint files
• Event records
• Download updated
firmware to Flash
memory
• Oscillography
GE Consumer & Industrial
Multilin
39
Reliability
• Protected against corrosion when installed in
chemically polluted environments through optional
conformal coating
• Extensive IEC & ANSI Testing
• Complete Burn-in and testing on Relays
• Self Testing
• Draw out Case (no external hardware)
• Dust Tight Door with Seal Provision
• Heavy Duty Terminals
• ISO 9002 Certified
GE Consumer & Industrial
Multilin
40
AC Sensing Connections
GE Consumer & Industrial
Multilin
41
Power, Output, RTD & Monitoring
GE Consumer & Industrial
Multilin
42
Outputs and Failsafe
OUTPUT CONTACTS SHOWN
WITH NO CONTROL POWER
GE Consumer & Industrial
Multilin
43
Communications
GE Consumer & Industrial
Multilin
44
User Interface
• EnerVista Setup Software (Windows Based)
• Flash Memory for Future Upgrades or industry
modifications
• Fully Programmable keyboard with 40 character
display and status indicators
• Fast and easy to use (set up program & manual)
• Draw out construction
GE Consumer & Industrial
Multilin
45
User Interface
GE Consumer & Industrial
Multilin
46
469 – Metering & Monitoring Features
• Individual Voltages &
Currents
• Real, Reactive & Apparent
Power Demand
• Energy
• Running & Maximum
Demand Levels
• Power Factor, Speed and
Temperatures
• Event Recorder (Last 256
Events)
• Trace Memory (128 Cycle
Waveform Capture)
• Breaker Trip Coil Supervision
• Complete Self Checking
(Including Drawout Indicator)
• Pressure, Vibration, Speed,
and Temperatures via Analog
Inputs (4 – 20 mA or 0 – 1 mA)
GE Consumer & Industrial
Multilin
47
Monitoring
•
Event Recorder (256 Events)
•
•
•
Allows concise record of fast events
Logs important power system parameters at
time of event
Triggerable by faults, breaker state change,
contact/status input change
GE Consumer & Industrial
Multilin
48
Event Log
•Select the Event you wish to examine in more detail
•Many power system parameters are recorded in each
individual event log
GE Consumer & Industrial
Multilin
49
Event Log
GE Consumer & Industrial
Multilin
50
Metering,
Monitoring
& Reporting
• Running Hours
• # of Trips by Type
(summary)
• Time left for trip by
overload start (cooling)
• Greasing interval
• Contactor inspection
interval
• Pretrip values included
in trip report
GE Consumer & Industrial
Multilin
51
Reports
•Trip Counter
•Timers
•General Counters
GE Consumer & Industrial
Multilin
52
Learned Data
• Allows you to see
average operating
values
• Ability to make
corrective action to plant
electrical system or
process based on
statistics
GE Consumer & Industrial
Multilin
53
Trending
• Set up multiple parameters and time resolution to record starts, running
cycles
• See degrading trends develop after alarms are asserted
• Opportunity to fix process or electrical system prior to trip
GE Consumer & Industrial
Multilin
54
Monitoring
•
Waveform Capture (Up to 128 Cycles)
•
•
•
•
•
Useful for forensic engineering as well as
commissioning
Easy identification of fault types, evolving
faults, restrikes, arcing, etc.
May be triggered by events or manually
Time tagging, vector diagrams
Automated fault playback is an advanced
diagnostic tools
GE Consumer & Industrial
Multilin
55
Waveform Capture
GE Consumer & Industrial
Multilin
56
GE Consumer & Industrial
Multilin
57
469 Summary
• Comprehensive protection and control for large, medium
voltage induction and synchronous motors
• User-friendly visual software for setting, monitoring,
metering and single line diagrams
• Drawout construction for easy replacement
• Communications via RS232, RS485 and Ethernet ports
• Suitable for installations in chemically polluted environments
GE Multilin Inc.
Web: www.GEindustrial.com/multilin
215 Anderson Ave.,
Tel: +1 905-294-6222
Markham, Ontario
Fax: +1 905-201-2098
Canada L6E 1B3
Email: gemultilin@ge.com
GE Consumer & Industrial
Multilin
58
Going Forward
Create Motor Protection and Control Applications:
• Lessen Maintenance Costs
• Provide an Enhanced Degree of Standardization
• Improves Plant Performance
• Better Security & Reliability, Ease of Maintenance
• Integrates Easily for Retrofit and New Construction
• Provides More & Better Information to More Places
• Energy Management System, DCS, Process PLCs
GE Consumer & Industrial
Multilin
59
Going Forward
We Hope This Discussion Will:
• Start Discussions on Applications
• Develop Applications that Provide Value
• Be the Springboard for to Make Your Electrical
Processes More Reliable, Secure, Safe and
Profitable
GE Consumer & Industrial
Multilin
60
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising