Fluke 43B Application Guide

Fluke 43B
Applications Manual
38
Induction Motors
Checking Voltage Imbalance
For 3 phase induction motors, the supply voltage on all three phases should be
in balance. Voltage imbalance causes high unbalanced currents in the stator
windings, resulting in overheating and reduced motor life.
1
Open the main menu.
2
3
Make connections as shown below:
 Write down the voltage reading of phase 1 to phase 3 (V
1-3
).
4
Repeat this measurement for phase 2 to phase 3, and for phase 1 to
phase 2. Write down the values for V
2-3
and V
1-2
.
 VOLTS
/
AMPS
/
HERTZ


Fluke 43B Specifications

General

Category	Power Quality Analyzer
Interface	RS-232
Volts AC/DC	Yes
Ohms	Yes
Continuity	Yes
Diode Test	Yes
Capacitance	Yes
Harmonics Measurement	Up to 51st harmonic
Display	LCD
Battery Life	Approximately 6 hours
Weight	1.1 kg (2.4 lb)
Data Storage	Yes
Amps AC/DC	0.1 to 1000 A (with clamp)
Power Measurement	W, VA, VAR, PF
Dimensions	50 mm
Current Measurement Range	Via current clamp accessories (not built-in)