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Fluke 43B Application Guide

Fluke 43B
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Fluke 43B
Applications Manual
40
Checking Current and Current Imbalance
After checking voltage imbalance, check for current and current imbalance.
Unbalanced currents cause overheating and reduce motor life. Also single
phasing (complete loss of power on one of the phases feeding the motor) may
cause overheating in the two other phase windings.
1
Open the main menu.
2
3
Make connections as shown below. Run the motor at full load.
If no current is present, you may assume an open fuse or winding.
Write down the current reading (A
1
).
4
Repeat this measurement for phase 2 and phase 3. Write down the
values for A
2
and A
3
.
VOLTS
/
AMPS
/
HERTZ

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Fluke 43B Specifications

General IconGeneral
CategoryPower Quality Analyzer
InterfaceRS-232
Volts AC/DCYes
OhmsYes
ContinuityYes
Diode TestYes
CapacitanceYes
Harmonics MeasurementUp to 51st harmonic
DisplayLCD
Battery LifeApproximately 6 hours
Weight1.1 kg (2.4 lb)
Data StorageYes
Amps AC/DC0.1 to 1000 A (with clamp)
Power MeasurementW, VA, VAR, PF
Dimensions50 mm
Current Measurement RangeVia current clamp accessories (not built-in)

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