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TDR9000
™
Circuit Breaker Test System User’s Guide
72A-1898 Rev. A 11/01 A-51
Monday
, November 26, 2001 1:09 pm
Trigger Input
Parameters This feature enables the user to operate a circuit breaker using an
external trigger, such as a command from a remote control room, instead
of the Run Test button.
There are three Trigger Source conditions:
None (Internal) Test recording is triggered internally, and accepts
no external trigger inputs. The Instrument controls
the circuit breaker using the Trip/Close module.
AUX Contact An input that comes in through an Auxiliary
Contact triggers the test and is assigned to be
recorded on a designated channel of the Event
module (Figure A.63). The Trip/Close module is not
used for this test. The trigger can be one of four
types:
• Open to Close
• Close to Open
• Volts On to Volts Off
• Volts Off to Volts On
Figure A.63 AUX Contact Trigger Parameters
N
OTE
The AUX Contact 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.
After selecting the type of trigger, the TDR9000 channel being used to
monitor this trigger must be specified. Fifteen channels are available
(optionally) on the TDR9000: 1 through 5, C1 through C3. To record the
timing of the channel receiving the trigger, activate this chosen channel
(see ”Auxiliary Contacts Channel Activation” on page A-67).
”Pre-Triggering Data Collection” on page A-53 describes the pre-trigger
data functionality available for this test.