Doble TDR900 User Guide
72A-2612-01 Rev. A 09/06
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4.9 First Trip Tests
A “First Trip” test is a common name for an on-line test where clip-on CT’s and a
voltage probe is used to monitor the substation battery current and voltage during an
operation with the breaker energized (and usually under load).
This can be performed using the analog channels on the TDR900.
4.10 Other Tests
The TDR900 is also a data recorder and may be configured to record data under a variety
of conditions and in response to given events. These can be configured using the standard
software to control the input channels and record data.
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