Eaton Power Xpert Release PXR 10 Manual page 25

6 Power Xpert® Protection Manager - configuration software
6.2.1 Testing the breaker and trip unit
The PXPM software controls the testing of long delay trip, short delay trip, instantaneous
trip, maintenance mode, and ground (earth) fault trip via the USB communication. The
software allows for testing on any phase including neutral. The trip unit's display is used to
observe the current being injected and the elapsed time until trip. To perform testing will
require you to enter the four-digit password
The PXR trip unit has two built-in functional test modes available for use. One is a simulated
current test and the other is an internal secondary injection current test. Either mode can
be configured for opening or not opening the breaker.
The simulated test is an easy test to verify multiple points on the time-current curve. The
test current values are simulated in the software algorithms to precisely verify the accuracy
of the trip unit.
For internal secondary injection testing, the trip unit uses an independent built-in circuit
to generate a test signal, which is injected into the sensor input circuit. This test feature
replaces the need for an external secondary injection test kit.
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