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Wikkelkop
VPI
Vacuüm druk impregnatie
Onderhoud
Alternator
Generator
EMD
Predictief
Explosion proof
drukvast
Winding head
Winding end
VPI
Vacuum pressure impregnation
Maintenance
Periodiek
Voorspellend
Stator
Rotor
Motor
Periodical
Predicitve
Stator
Rotor
Motor
High Voltage motors
It’s not wel known that frequent start/stop cycles can cause
downtime!
Situation
Isolatie
Elektrische
diagnose metingen
EMD
Rapport
Hoogspanning
Insulation
Electrical diagnostic
measurement
EDM
Report
High voltage
Reason to failure
• Start/stop cycles induces:
– High mechanical forces
– Movements on the winding heads
• Resulting in:
– Reduced lifetime
– Unwanted downtime
Winding heads
Deelontlading
Weerstand
Polarisatie-
index
PI
Verliesfactor
Partial
discharge
Resistance
Polarisation-
index
PI
Dissipation
factor
• What is the current state of your high voltage
motor?
• Is failure near?
• Is your next startup
the last startup?
Questions?
Breakpoint
Tangens delta analyse
Nazicht
Betrouwbaarheid
Falen
Tangens delta
Analysis
Inspection
Reliability
Failure
• Diagnose the current status onsite with specialist
measurements
Solution
Overhalen
Herwikkelen
Revisie
Demontage
Stilstand
Overhaul
Rewinding
Revision
Disassembly
Downtime
• Problem:
– Detecting winding head problems from standard partial
discharge measurements is difficult to interprete
• Solution:
– Only skilled engineers can identify beginning windinghead
degradations with PD
People’s skills
Advies
Hertelling
Service
Advise
Repair
Service
Onsite
On site
• Include specialist PD measurements in your
preventive maintenance schedule
and avoid unexpected downtime
Added value
Bob Van Loock
Tel: +32 (0)3-644 19 61
Adress: Metropoolstraat 15
2960 Schoten Belgium

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High voltage motors end winding problems