ABB Life Expectancy Analysis Program
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Transcript of ABB Life Expectancy Analysis Program
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ABB Life Expectancy Analysis Program (ABB LEAP) for stator windings of high voltage rotating machines
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ABB LEAP facilitates the management of machine maintenance
ABB LEAP is much more than just a package of inspections: it is a systematic approach to maintenance management.
The materials and components of electrical machines are
subject to thermal, electrical, ambient and mechanical stresses.
This leads to a process of degradation as materials lose
strength over time (blue curve).
Operating stresses – both steady state and transient – are also
present (red curve). At the point where the two curves cross,
failure becomes imminent.
ABB LEAP provides the information needed for timely action to
re-position the red and blue curves.
Appropriate maintenance can help to re-draw the red, and
possibly even the blue curve, preventing premature failure
and extending the life of the machine.
What makes ABB LEAP special is its ability to track the development of defects over time. As a result ABB LEAP can be directly integrated into a maintenance plan.
02 | ABB Life Expectancy Analysis Program (ABB LEAP)
Strength
Stress
Premature
failure
Failure
Time
Co
nfid
en
ce level
Basic
90
75
60
45
30
15
0Standard Advanced Premium
Analysis is performed at four levels depending on the opportunities
for data collection over the machine’s lifetime.
ABB LEAP levels
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Partial Discharge Pattern
– Optimizes maintenance planning for electrical machines
– Supports efforts to extend machine lifetime, boosting Return On Investment
– Facilitates decision making for long and short term maintenance and run-replace decisions, even when data can only be collected once
– Minimizes downtime at lower risk levels
– Provides inputs for life cycle cost estimation
ABB LEAP offers real benefits
ABB Life Expectancy Analysis Program (ABB LEAP) | 03
Strength
Stress
Premature
failure
Failure
Time
Time (sec)
Po
l-D
ep
ol
Cu
rre
nts
(m
icro
Am
p)
Polarization-Depolarization Currents UVW PHASE
1 10 100 1000
100
10
1
0,1
0,01
Time (msecs)
CA
PA
CIT
AN
CE
(A
rbit
rary
Un
its)
Instantaneous Capacitance Variations @ 8 kV
40 42 44 46 48 50 52 54 56 58 60
120
100
80
60
40
20
0
-20
-40
-60
-80
U - Phase V - Phase W - Phase UVW - Phase
ABB offers a package of DC (PDCA) and AC (Non-Linear Insulation Behaviour, Partial Discharge and Tan Delta & Capacitance Analysis)
measurements, to assess the condition of the stator winding.
60 120 180
Phase (�)
Am
plit
ud
e (C
)
Co
un
ts
240 300 3601
10
100
1107
0
0.0
500p
1.0n
1.5n
2.0n
2.5n
3.0n
3.5n
4.0n
4.5n
5.0n5.2n
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© Copyright 2010 ABB. All Rights Reserved
We reserve the right to make technical
changes or modify the contents of this
document without prior notice.
No part of this publication may be reproduced
or transmitted in any form or by means,
electronic, mechanical, photocopying,
recording or otherwise without prior written
permission of ABB.
AB
B L
EA
P b
rochure
EN
Rev
B 2
01
0
Contact us
www.abb.com/motors&generators
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