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PA3000 Four-channel, Multi-phase AC/DC Power Analyzer
Inrush Current Testing
DEMONSTRATION GUIDE
Inrush Current Testing
Most electrical devices draw initial current that is significantly higher than the nominal steady
state current due to low input impedance. Motor drives and transformers are known to have inrush
current twenty times higher than the steady state currents. It is important to characterize inrush
current to determine input conductor and fuse ratings.
TEST SETUP
Complete the following steps to set up the PA3000 to take the inrush current measurements:
• Connect the DUT using a Tekronix BB1000 Breakout Box as shown in the wiring diagram.
(See Figure 5-1.)
• Use the 30A shunt on the PA3000 for inrush current measurements. Using the 1A shunt
is not recommended for inrush current because peak currents can be quite high, even
for applications where the nominal steady state current is below 1A.
Figure 5-1. Inrush
current measurement
wiring diagram.
WATCH VIDEO
How to make Inrush
Current Measurements
www.tek.com/inrush_
video
