
TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01
2-19
Monday
, November 26, 2001 1:09 pm
Self-Diagnostics
The Self-Diagnostics test performs a two-tiered analysis of machine
functionality. This test determines the validity of both the Physical Front
Panel and the internal operations based on the results from the
processing of pre-determined signals. These signals are designed to
emulate the signal flow that occurs on all measurement channels during
various tests. Refer to ”Self-Diagnostics Test” on page B-1.
First Trip/Close Tests
Use a First Trip/Close to capture operational data for circuit breakers that
have been idle. To preserve the integrity of data, and to study the
characteristics of long dormant circuit breakers, these tests are performed
on circuit breakers without removing them from operation. Main Contact
timing test results appear as waveforms instead of the usual contact state,
trip, resistor level/bounce, and close, because a CT secondary is used as
the signal source instead of the main contact cables, since the Main
Contacts are energized.
N
OTE
• Compare the First Trip/Close Test Results with subsequent operations
of the same type.
• These tests are useful for long idle spare breakers as well.
First Trip/Close Test
Measurements
The TDR9000 can be used for First Trip/Close testing on IPO circuit
breakers as well as those with a single mechanism for the three phases.
Any number of signals are measurable, including motion and velocity. A
First Trip/Close Test Plan can be designed to quickly test a distribution
breaker of relatively low system importance, while another may include
a complete set of tests on a circuit breaker that is rarely removed from
service. The former requires a Test Plan designed for quick testing and a
minimum set of channels, while the latter setup requires a recommended
set of channels. In this guide, the process is described using an external
trigger. After the first Trip test, a Close test should also be run followed by
a second Trip and Close test for comparison purposes.
Содержание TDR9000
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