Ethiopia Seminar PDF
Ethiopia Seminar PDF
Ethiopia Seminar PDF
Fluke:
The Premium
Test Tools Brand
• Founded in basement of John Fluke’s home
in Springdale, Connecticut, USA in 1948
• Over 3500 employees
worldwide in 23 countries,
• Manufacturing in Everett (USA), the
Netherlands, the U.K., Austria and China
The Fluke brand has a reputation for:
• Ruggedness
• Accuracy
• Safety
• Ease of use
• Rigid standards of quality
Headquarters
Electrical Defibrillator
Fluke Connect® Fixed Infrared Datacom Copper
Calibration Analyzers
Sensors Certification
Digital Electrical Safety
Multi-Meters Analyzers Fixed Thermal Datacom Fiber
RF Calibration
Electrosurgery Imagers Optic Testing
Electrical Tools Analyzers
Temperature Temperature Datacom
Gas Flow
Calibration Profiling Systems Verification Tools
Process Tools Analyzers
Nuclear Medicine
Power Quality Infrared Process
Flow Calibration
Nuclear Power Imaging
Systems
Vibration
Portable
Data Acquisition Patient
Thermometers
Simulators
Scope Meters
Radiation Safety
Electrical Engineers
Instrumentation Supervisors
Mechanical Foreman
Construction Specialists
Where can we help you
Electrical Maintenance
Digital Multimeters, Insulation & Earth Installation & Portable Power Quality Battery Testers
Clamp Meters, Ground Testers Appliance Testers
Electrical Testers,
& ScopeMeter®
Where can we help you
Thermal Imaging
Cameras
Pradeep Ravi
Technical Sales Manager – Fluke Corporation
Multiple values?
Logging?
Storing and sharing?
STAR ATHLETE
Analyze Complex
ASSET CLASSES
Diagnose Common
SEMI-CRITICAL
Screen for
NON-CRITICAL
good
P ultrasound
vibrations
condition
particles
temperature
noise
F
bad
time
cost increase anticipation time decrease
• repair costs • plan repair
• energy costs • order spares
Clamp meter
Power Quality
Fluke T6 Electrical Testers with FieldSense
You can’t
measure voltage
without test leads
T6-600
T6-1000
Reasons to Believe : FieldSense
Signature type 2 :
Harmonics
Lighting
Distribute and properly adjust the lighting
can significantly reduce the associated
cost.
Advances in lighting technology
provide significant benefits.
134,3 ºC 39,7 ºC
14W, Energy+
5 pcs in same line,
Apk=2,5A
Case 2A:
PEN line is overheating
• Do not use any reduced cross-sections
• Fire risk
• Measure with an infra-red camera
55
Harmonic in the neutral line
• 3rd harmonic in the neutral line can take high values
• Example: Computer center
54
Consequences of
Harmonics
• Tripping RCD’s
• Neutral currents
• Motors overheating
• Motor vibration/noise
• Increased reactive power
• “Derating” of transformers
VA
35
Consequences of bad Power Quality
• We only see or notice the manifestations of Power Quality!
BUT
• These manifestations can have multiple causes!
• Measure to find root cause
36
Case 2B:
Hot motor body
– Overall Vibrations
– Bearing Vibrations
– Temperature
– Easy to use
– Automated Diagnosis of
Mechanical problems
– Helps prioritize repair
actions
Transducer picks up
vibration signals
from bearing
locations and
transmits them to
the tester
1 2 3
Diagnosis
Angular – the centerline of the two shafts Parallel – the centerline of the two shafts
intersect but are not parallel are parallel but not concentric.
“Runcorn” study
Power
Distribution
board
7.5 kW
pipe Water tank
3000RPM
alignment
6%
4%
2%
0%
0 0.2 0.4 0.6 0.8 1 1.2 1.4
In [mm]
mm/100 mm
Pin coupling less flexible to
support angularity
Gap Tyre Coupling
6.00%
4.00%
2.00%
0.00%
0 0.5 1 1.5 2 2.5 3 3.5
mm/100 mm
23% 31%
• Less than 10 % were within the (11 - 20) (21-50)
recommended site alignment standard
10%
• The total power consumption of the (6-10)
machines in this plant is 30 kWatt/hour
7% 18%
11% (51 -…
• A saving of 0,75 % can be achieved (0 - 5) (>100)
Set up
Measure
Diagnose
Rotor Stator
1 2 ? 3 4
Pick Automatically Document all
Connect Test Refresh
Measurement see relevant measurements
Tool Correctly knowledge
Subsection measurements in single file
DV/DT
Filter
Check Points
•Nominal • DC Bus •Motor overload
supply • Voltage unbalance •Single phasing
voltage, • Current unbalance •Bearing failures
current and • Sigma Current and PE Current •Misalignment*
frequency
• Output reflections •Mechanical imbalance*
•Voltage and
• Disturbances •Looseness
current
unbalance • Harmonics •Insulation breakdown
•Transients • Volt to Hertz ratio •Shaft voltage and bearing
•Harmonics • Diagnostic shutdown current
•Power factor • Grounding •Grounding
7/12/2018 Fluke MDA 500 series - Sales Training - september 2018 *: Require Mech. tools 67
Voltage and Current Measurements
Connection Points Nominal Drive Input Measurements
• DC Level
– Check the value and stability of the internal DC-bus and influence of power feedback and braking (if supported by
the drive).
– Except for controlled rectifiers (IGBT) inputs, the voltage should be about 1.31 to 1.41 times the RMS line voltage.
– A low DC voltage can trip the drive. This can be caused by a low input mains voltage or the input voltage is distorted
by flat topping. Use the RECORD function to check the DC voltage variations over time.
• AC Ripple
– After the AC to DC conversion a slight AC ripple component will remain present on the DC-bus. The shape will
depend on the conversion principle.
– If the peaks of the ripple have a different repetitive level, one of the rectifiers could be malfunctioning.
– Ripple voltages above 40V can be caused by malfunctioning capacitors or undersized drive for the motor and load.
– Use the RECORD function to checkFluke
7/12/2018 the MDA
ripple
500voltage variation
series - Sales Trainingover time. 2018
- september 72
Motor Drive Output Nominal Voltage & Current
Connection Points Drive Output Measurements
• Measures voltage between 2 of the phases and current on one of the phases.
• Check if the drive output voltage and current are within the limits for the motor. If the
output current is too high, the motor may run hot and could result in decrease of stator
insulation life.
• Check if the voltage/frequency ratio (V/Hz) is within specified limits for the motor. If V/Hz
too high the motor may overheat, if V/Hz too low the motor will lose torque.
• Stable Hz, unstable V points to DC bus problems. Unstable Hz, stable V points to IGBT
problems. Unstable Hz and V points to speed control circuits.
• Phase to phase is mainly used to check for high voltage peaks. These may damage the
motor insulation and drive output circuit and cause the drive to trip.
• Voltage peaks higher than 50% of nominal voltage are often problematic.
• Phase to ground is mainly used to measure switch frequency and identify high voltage
peaks to ground that could damage the motor insulation.
• Phase to DC or DC+ is also used to measure switch frequency, identify IGBT problems
or when signal is floating up and down this may indicate system grounding problem.
processes changes cause un-intended overloads to rated specification, de-rate or adjust load
• Mechanical friction, foreign objects or restrictions in rotating • Power
Load
• Measurement Benefits
– Quickly quantify performance relative to
design specification
– Measure and eliminate poor power quality as
source of motor failure
• Measurement Benefits
– No load sensor required, save cost and
overcome challenges of accessing shaft
– Quickly ascertain load under operating
condition
Fluke Europe BV Fluke Seminar 82
Fluke-438-II Motor Rated Load
• Calculated real time load factor
– Operating conditions, load and power quality impact
the rated performance of motors
– To compensate, the motor power must be de-rated
to mitigate temperature rise and stress to windings
and mechanical components
• Measurement Benefits
– Quickly identify motors operating at or beyond
limits, make system adjustments to prevent failures
– Size the motor to save operating cost and prevent
downtime
Fluke Europe BV Fluke Seminar 83
Converting losses to cost
84
Final thoughts
• Thermal Imaging is a nice method but always use complementary
tools to find out root cause of the problem.
• Use Screening tools as much as possible to be more proactive in
doing vibration , thermal imaging and electrical measurements.
• Good Power Quality is ensuring electrical installation efficiency.
• Good power quality will contribute to machine health. Increasing
the lifetime of machines and installations
• Energy Saving: Good Power quality & Motor efficiency saves
energy and maintenance cost and avoids problems
• “ To measure is to know”!
85
Thank you for your attention