Vanguard CT-8000 - Manual (Page 53)

REV 2 CT-8000 USER’S MANUAL
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3.3 Performing Circuit Breaker Timing Tests
The CT-8000 can initiate the breaker operation and perform a timing test on the following
operations:
• OPEN
• CLOSE
• OPEN-CLOSE
• CLOSE-OPEN
• OPEN-CLOSE-OPEN
The CT-8000 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 CT-8000 using several options:
• Contact #1 CLOSE
The CT-8000 can initiate a CLOSE command and then an OPEN command after detecting
the closing of the breaker’s contact. The CT-8000 detects the closing of the contact
through contact channel #1. This option is recommended for the CLOSE-OPEN operation
since it truly represents when the circuit breaker closed and then opened.
• Set DELAY
The CT-8000 can initiate a CLOSE command and then an OPEN command after a
programmable delay set in milliseconds.
• No DELAY
The CT-8000 can initiate a CLOSE command and then an OPEN command without any
delay. Since the circuit breaker is in the OPEN state, the 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 operation can be initiated by the CT-8000 by using a programmable
delay between each of the operations. The delays can be set between the OPEN to CLOSE
commands and between the CLOSE to OPEN commands.