Machine Monitoring Systems Ltd
Machine Monitoring Systems Ltd
Unit 4 Business Point, P.O. Box 92, Bicester, Oxon, OX26 5EW
Tel: 01869 250801
Fax: 01869 250802
E-mail: Office@MachineMonitoring.co.uk
MCEmax Motor Condition Report
Client: Site contact: Survey date: Engineer: -
Confidentiality and Liability.
This document is confidential; no part of this document may be used, reproduced, or transmitted to a third party without permission. The user of
this document has the obligation to employ safe working practices for any activities referred to and to adopt specific practices appropriate to
local conditions. MMS shall have no liability for any loss, damage, injury, claim, expense, cost, liability or other consequence howsoever
arising, as a result of use or reliance upon any information contained in or omitted from this document.
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Machine Monitoring Systems Ltd
Listed here are the tests that the MCEmax system is able to carry out. For maximum benefit every
test should be carried out each survey. However safety and access issues may mean that some tests
cannot always be undertaken.
Standard Static (Non running) Tests
The MCE Static test is a data capture performed on de-energised motors. Fault Zones identified in
this test are: - Insulation, Stator & Power Circuit. The tests include: Resistance phase-phase
Taken on a de-energized motor. Trends in ph-ph resistance readings can indicate the
development of high resistance connections.
The resistance to ground (RTG)
Taken on a de-energized motor. Indicates the condition of the insulation system of the stator
or rotor windings and the power circuit.
Inductance phase-phase
Measured on a de-energized motor. It is a measurement of the circuit's resistance to a
change in current. It indicates the ability of a winding to produce a magnetic field and can
be used to show the increase or decrease in that ability.
Capacitance to ground (CTG)
Taken on a de-energized motor. It reflects the cleanliness of the windings and cables. With
a build-up of material on the surface of the windings and cables, higher capacitance readings
will result.
Inductive imbalance
Calculated using the equation: %B/I = (abs>(1-avg);(2-avg);(3-avg))/avg x 100. Using
each individual ph-ph inductance reading the inductive imbalance indicates if any of the
phases has less inductance which could indicate phase-to-phase and coil-to-coil current
leakage paths, and reveal poor or incorrect rework.
Polarization index profile
The polarization index profile is a ten-minute insulation test. The resistance to ground values
are averaged and plotted every 5 seconds. A Dielectric Absorption ratio and P/I ratio are
automatically calculated at the end of the test.
The ratios are comparable to the IEEE 43-2000 Standards
Rotor Influence Check (RIC)
A graphical representation of the rotor-stator relationship. The rotor’s residual magnetism
affects the phase – phase inductance readings. The resulting graph of these changes in
inductance with rotor position can be interpreted to evaluate the rotor, stator and Air Gap
fault zones.
Confidentiality and Liability.
This document is confidential; no part of this document may be used, reproduced, or transmitted to a third party without permission. The user of
this document has the obligation to employ safe working practices for any activities referred to and to adopt specific practices appropriate to
local conditions. MMS shall have no liability for any loss, damage, injury, claim, expense, cost, liability or other consequence howsoever
arising, as a result of use or reliance upon any information contained in or omitted from this document.
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Machine Monitoring Systems Ltd
Standard Running Tests
In-rush /start up test
The in-rush /start up current capture is used to record and graph a motor’s RMS
current during start up. This evaluates motor performance and condition.
High/Low resolution current signature analysis
The High and Low Current Signature Analysis (CSA) tests are used to evaluate
condition of an induction motor’s squirrel cage rotor.
Eccentricity test
Air gap eccentricity coupled with the interaction of the rotor and stator
electromagnetic forces can increase the risk of mechanical damage to winding coils
and insulation.
Power analysis test
The power analysis (PA) test instantaneously records current and voltage data from
all 3 phases in a motor circuit. It provides a snapshot of motor performance and condition.
Confidentiality and Liability.
This document is confidential; no part of this document may be used, reproduced, or transmitted to a third party without permission. The user of
this document has the obligation to employ safe working practices for any activities referred to and to adopt specific practices appropriate to
local conditions. MMS shall have no liability for any loss, damage, injury, claim, expense, cost, liability or other consequence howsoever
arising, as a result of use or reliance upon any information contained in or omitted from this document.
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Machine Monitoring Systems Ltd
MOTOR IDENTIFICATION
MOTOR ID
Unit 2A ID Fan
Rotor evaluation (Plot1) shows high pole pass sidebands either side
of the 50Hz fundamental frequency
The 15-second current snapshot (plot 2) shows a lot of fluctuations
in the spectrum
This data suggests rotor bar issues are present, we have set up
some extra measurement points in our vibration database to
monthly monitoring and see if the problem is deteriorating.
As the rotor is under its greatest stress on start-up it is
recommended that the number of starts on the motor be kept to a
minimum. Further monitoring will allow trending of this issue.
PERFORMED TESTS
Rotor Evaluation
Eccentricity
Current Snapshot
Confidentiality and Liability.
This document is confidential; no part of this document may be used, reproduced, or transmitted to a third party without permission. The user of
this document has the obligation to employ safe working practices for any activities referred to and to adopt specific practices appropriate to
local conditions. MMS shall have no liability for any loss, damage, injury, claim, expense, cost, liability or other consequence howsoever
arising, as a result of use or reliance upon any information contained in or omitted from this document.
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Machine Monitoring Systems Ltd
MOTOR IDENTIFICATION
MOTOR ID
Unit 3A Rap Pump
Some eccentricity peaks can be seen in the spectrum. Possible
causes of eccentricity are, worn bearings, bent shaft or a twisted
motor frame (soft or sprung foot)
PERFORMED TESTS
Rotor Evaluation
Eccentricity
Current Snapshot
Confidentiality and Liability.
This document is confidential; no part of this document may be used, reproduced, or transmitted to a third party without permission. The user of
this document has the obligation to employ safe working practices for any activities referred to and to adopt specific practices appropriate to
local conditions. MMS shall have no liability for any loss, damage, injury, claim, expense, cost, liability or other consequence howsoever
arising, as a result of use or reliance upon any information contained in or omitted from this document.
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Machine Monitoring Systems Ltd
MOTOR IDENTIFICATION
MOTOR ID
Unit 1B Lift Pump
PERFORMED TESTS
Rotor Evaluation
Eccentricity
Current Snapshot
Pole pass sidebands can be seen in warning alarm (Plot 1) these
sidebands can also be seen at the same amplitude in the last data
collected in 2007. (Plot 2)
Although the peaks are in alarm no deterioration has been recorded
Continue to monitor
Confidentiality and Liability.
This document is confidential; no part of this document may be used, reproduced, or transmitted to a third party without permission. The user of
this document has the obligation to employ safe working practices for any activities referred to and to adopt specific practices appropriate to
local conditions. MMS shall have no liability for any loss, damage, injury, claim, expense, cost, liability or other consequence howsoever
arising, as a result of use or reliance upon any information contained in or omitted from this document.
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Machine Monitoring Systems Ltd
MOTOR IDENTIFICATION
MOTOR ID
Unit 1A FD Fan
PERFORMED TESTS
Rotor Evaluation
Eccentricity
Current Snapshot
Pole pass sidebands can be seen in warning alarm (Plot 1) these
sidebands can also be seen at the same amplitude in the last data
collected in 2007. (Plot 2)
Although the peaks are in alarm no deterioration has been recorded
Continue to monitor
Confidentiality and Liability.
This document is confidential; no part of this document may be used, reproduced, or transmitted to a third party without permission. The user of
this document has the obligation to employ safe working practices for any activities referred to and to adopt specific practices appropriate to
local conditions. MMS shall have no liability for any loss, damage, injury, claim, expense, cost, liability or other consequence howsoever
arising, as a result of use or reliance upon any information contained in or omitted from this document.
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Machine Monitoring Systems Ltd
The following motors have pole pass sidebands in the observe alarm. No immediate action is
required, monitoring to continue at normal intervals (1 Year)
Unit 1
1D RAP Pump
1A Lift Pump
1A ID Fan
Unit 2
2 CW Pump
2B Extraction Pump
2C Extraction Pump
2B ID Fan
Unit 3
3B FD Fan
3A ID Fan
Unit 4
4 CW Pump
4A Lift Pump
4C Extraction Pump
Confidentiality and Liability.
This document is confidential; no part of this document may be used, reproduced, or transmitted to a third party without permission. The user of
this document has the obligation to employ safe working practices for any activities referred to and to adopt specific practices appropriate to
local conditions. MMS shall have no liability for any loss, damage, injury, claim, expense, cost, liability or other consequence howsoever
arising, as a result of use or reliance upon any information contained in or omitted from this document.
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