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TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01 A-53
Monday
, November 26, 2001 1:09 pm
N
OTE
The System Trigger In channel is designed to work in a substation using
station battery voltages of 48 VDC or higher. Voltages less than 48 VDC
may not meet the threshold requirements of the Volts On state.
When any external trigger is used, the internal command parameters
(whether default values or values set by the operator), are effectively
disabled, since the command to operate originates externally
.
Testing using an external trigger gives the user a way to check that the
remote command of the circuit breaker works. ”Pre-Triggering Data
Collection” describes the pre-trigger data functionality available for
external trigger tests.
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OTE
For a test tabulation of an external test to be meaningful, the T0 (trigger
event) and the circuit breaker activation must coincide.
Pre-Triggering
Data Collection This is available for both the AUX Contact and Trigger In test. It is the
length of time, in ms or cycles, prior to a triggering event for which data
is retrieved. This pre-trigger data is useful for recording events that occur
prior to the trigger event.
Zero to 500 ms of pre-trigger time is available.
Trigger Output
Parameters Trigger Output enables the user to operate a circuit breaker using an
input generated by the TDR9000, as connected through the Trigger Out
connectors of the System module. The pulse width can be set, along with
a trigger delay. The Trigger Output parameters pertain to only one thing:
the TDR9000 Trigger Out channel (on the System module). The Trigger
Output is essentially a solid state switch output (dry contact), that can be
used to control an accessory or trigger another TDR9000. The Trigger
can operate in circuits up to 300 V peak, 0.5 A maximum.
There are two Trigger State conditions:
Off This disables the Trigger Output feature.
On This enables the Trigger Output and activates the
fields shown in Figure A.65.
Figure A.65 Trigger Output Parameters