Vanguard DigiTMR S2 - Manual (Page 50)

DIGITMR S2 USER’S MANUAL REV 1
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3.5 Timing Breakers in On-line Mode
In On-line mode, the DigiTMR S2 can only provide OPEN or CLOSE times using the CT input
channel. The DigiTMR S2 can initiate the OPEN or CLOSE tests, and then the test report will
show the OPEN or CLOSE coil current reading and waveform. If the DigiTMR S2 is operated in
On-line mode using the External Trigger, no coil current reading or waveform will be recorded.
3.6 Timing Breakers in Time-Travel Mode
The DigiTMR S2 can initiate the breaker operation and perform a timing test on the following
operations:
• OPEN
• CLOSE
• OPEN-CLOSE
• CLOSE-OPEN
• OPEN-CLOSE-OPEN
NOTES
• The DigiTMR S2 can start the OPEN-CLOSE operations without a delay or by
using a programmable delay between the OPEN and CLOSE commands.
• The CLOSE-OPEN operation can be started by the DigiTMR S2 using several
options:
o
Contact #1 Close
The DigiTMR S2 can initiate a CLOSE command and then an OPEN command
after detecting that the breaker’s contact was closed. The DigiTMR S2 can
detect when the breaker’s contact is closed via contact channel #1. The
selection of this option is recommended for the CLOSE-OPEN operation
since it truly represents that the circuit breaker closed and then opened.
o Set DELAY
The DigiTMR S2 can initiate a CLOSE command and then an OPEN command
after a programmable delay (in milliseconds).
o No DELAY
The DigiTMR S2 can initiate a CLOSE command and then an OPEN command
without a delay. Since the circuit breaker is in the open state, the circuit
breaker’s 52B contact allows the close coil to be energized, which can start
the close command. When the circuit breaker is making the transition from
an open state to a close state, the 52A contact will close, allowing the
breaker to initiate the open command.
• The OPEN-CLOSE-OPEN operations can be initiated by the DigiTMR S2 using a
programmable delay between each of the operations. The delays can be set
between the OPEN to CLOSE and between the CLOSE to OPEN operations.