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Zmags
IE
Winding Resistance
Testing of Motors
Winding resistance measurements detect various faults in motors and transformers: shorted
turns, loose connections, broken strands and malfunctioning tap changer mechanisms. Winding
resistance measurements detect problems in motors which other tests may not find.
T
hese problems include partial or fully shorted coils, poor A higher test voltage will overcome the inductance more quickly (up
crimps or connections, imbalance between phases (improper to 50 times faster than a normal low-resistance meter). A regular
turns on phases) and incorrect coil (phasing) connections. multimeter cannot perform winding resistance measurements.
Studies conducted by IEEE and the Electric Power Research Institute Megger’s MTO106 provides up to 6 A of test current and 48 V of
(EPRI) on electric rotating mac
IE Winding Resistance Testing of Motors Windi
8 22 28 30 2 CONTENTS 4th Quarter 2019 •
COVER STORY FLIR IS CONTINUOUSLY IMPROVING THERMA
ARC FLASH The Physics of Arcing Faults and h
• The electrical system maintainers are likely t
ARC FLASH Continued from page 5 ADMINISTRATIVE C
Enhanced resolution across all levels. The full s
ARC FLASH Arc-Flash Relays Save Plan
Plug & Play Arc-Flash Protection Triple Pro
ARC FLASH Arc faults in low voltage ele
ARC FLASH Continued from page 10 where flammable
Damaged Arcing leads Un
ARC FLASH Continued from page 13 A recent amendm
IE Introduction to Arcing Faults for the Safe
ARC FLASH Continued from page 15 ELECTRICAL ARCS
ARC FAULTS - THE OTHER ELECTRICAL HAZARD Arc faul
ARC FLASH Continued from page 17 arcing fault be
IE Overcoming Arc Flash Hazards Arc Flash is
ARC FLASH Continued from page 19 INITIATION
THERMOGRAPHY Certification of Thermographers i
THERMOGRAPHY Convenience an
IE Figure A Figure B
CONDITION MONITORING Protect your Operations
With a Smart Motor Control system A Smar
SAFETY IN INDUSTRY Safety in the Electrical Ind
SAFETY FIRST INDUSTRIAL STRENGTH LABELS PRI
MINE ELECTRICAL MINE ELECTRICAL REGISTRA
2019 REVIEW 3 – 5 JUNE 2019 PULLMAN MERCURE BRISB
PROTECTION & CONTROL Specifying for Solar Applica
The Power in Whatever your application, we’ve got
PROTECTION & CONTROL Continued from page 30 advi
IE Current-Limiting MV Fuses for Indoor Distribu
PROTECTION & CONTROL Continued from page 33 CLF
IE Typically, there are three circuit parameter
POWER QUALITY A New Choice in Distributio
Ultimate
POWER QUALITY Standby Power Generation Set Sizi
Average power Ratings refer to the average power
POWER QUALITY Continued from page 39 EFFECTS OF
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