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6 Power Xpert® Protection Manager - configuration software
PXR tRiP units foR PoweR Defense molDeD case ciRcuit bReakeRs
MN012007EN March 2019 www.eaton.com
6.3.1 Functional Test – Secondary Injection (License Required)
Secondary injection utilizes a separate circuit that injects a signal in parallel with the output
of the current sensor, representing the output of the sensor. All the built-in protection
circuitry, and routines respond per the settings in the breaker. The PXPM software initiates
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, or communications can be used to observe
the current being injected, and the elapsed time until trip. Complete testing of the trip unit
can be accomplished when a current sensor continuity test is used in conjunction with
secondary injection test. The complete testing of the breaker may be an acceptable alterna-
tive to a primary injection test of the breaker. Secondary injection testing and current sensor
continuity testing when used in place of primary injection testing will result in less wear on
the breaker.
THpt:
If the trip unit is equipped with ground fault protection, and another function is being
tested, temporarily turn off the ground fault functionality in the settings of the trip unit.
Failure to do so may result in unintentional ground trip during testing. Remember to
turn it back on after completing the testing.
6.3.2 Functional Test – Simulated (License Required)
Simulated functional testing sets values within the trip unit to the level desired via PXPM.
Simulation can be helpful to verify various points on the time current curve, and operation of
the breaker based on different situations. Simulation mode is also helpful for verifying correct
communications settings, and scaling when used in conjunction with an operator interface,
PLC, SCADA, or other devices that are reading the real-time data from the PXR trip unit.
6.3.3 Current Sensor Continuity Test for Frames 3-6 (License Required)
The current sensor test utilizes a separate circuit to create a signal that is directed though
the Rogowski coil. This signal will verify continuity and functionality of the Rogowski coil.
6.3.4 Open Breaker Test
The open breaker test will exercise the electrical and mechanical hardware required to physi-
cally open the breaker.
6.3.5 Primary Injection Test
Primary injection testing may be performed on a breaker equipped with PXR trip units.
Please be aware that health monitor within the trip unit will register such a test, and this
may result in a lower health status value. Please see chapter 8 Health Monitor for more
details on the Health Monitor and how to reset.
6.3.6 Testing
When beginning a test session, parameter values for “As Found” are captured. Selecting
various test options, setting the current to be injected, executing the tests, and recording
the results can be done in multiple passes within one test session. Parameter values for “As
Left” are captured when the test operation is stopped. Any difference between “As Found”
and “As Left” parameter values will be highlighted.
The Generate Report function will record the testing results in a PDF file. The user can input
information regarding the customer and breaker’s location, environment, condition, etc. as
part of the report. The report includes the settings and results of all tests run during that
session.
