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PXPM software essentials
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Advanced breaker testing
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Core features
Circuit breaker testing FAQIn primary injection testing, large currents are injected into the primary side of the breaker, exercising the sensors and protection circuitry. This results in complete testing of all parts of the circuit breaker, though it is time consuming and costly. This also takes a toll on the breaker’s overall life, as it creates stresses on the device.
For a secondary injection test, current is injected in parallel with the output of the current sensor, representing the output of that sensor. All the built-in protection circuitry, and routines respond per the settings in the breaker.
This test does not assess the functionality of the current sensor.
The current sensor test verifies continuity and functionality of breaker’s current sensors.
PXPM performs this test by proprietary circuitry in the PXR trip unit to generate a signal that is directed through the Rogowski coil.
PXPM combines secondary injection testing with sensor continuity testing to test all parts of a circuit breaker.
The complete testing of the breaker may be an acceptable alternative to a primary injection test of the breaker.
When the firmware given a value of current value to test itself at.
PXPM performs this test by using issuing a command to the trip unit with the value of current the tester has requested. This assessment is primarily performed as a second-level test when troubleshooting.
Curve testing verifies various points on the time current curve, and operation of the breaker based on different situations. This can be used to verify that the trip unit’s protection algorithms are functioning properly.
PXPM performs this by varying the signal during secondary injection testing.
PXPM can also achieve this through the simulated functional test.
Pass/Fail testing is a convention of reporting the outcome of each test instead of just data.
PXPM is programmed with the breakers’ time-current curves to automatically summarize the results of the testing. PXPM reports a time for LSIG and determines the outcome of the test based on the time-current curve.
Test reports summarize the details of the testing performed. Frequently, these are manually created based on results from the testing equipment.
PXPM provides a detailed summary of the testing performed in PDF format. This report can be customized with details about the breaker’s name or location.
