
46
MODE 5
Figure 55
– Selecting Input Mode 5
This choice monitors the state of a single Opening Coil, the Closing Coil, the 52a and 52b auxiliary switches . When the Opening
Coil is energized, the Optimizer3 registers an Open operation and records the time duration of the Opening Coil pulse. The start
is the protective relay closing the trip circuit. The end is the opening of the 52A auxiliary switch, modified by the A Input Delay,
which begins the Contact Duty measurement. This time duration is named Opening Time, given in milliseconds. The Opening Time
measurement is modified by the A Input Delay.
The Opening Travel Time is defined by the time duration beginning with the falling edge of the Opening Coil pulse (52a auxiliary
switch opening) and ending with 52b auxiliary switch closing. This segment of time is recorded and reported as Opening Travel
Time, given in milliseconds. Opening Travel Time is the actual measurement and is not modified by the A Input Delay.
When the Closing Coil is energized, the monitor registers a Close operation. The time duration from Closing Coil energization to 52b
auxiliary switch opening is reported as Closing Time, given in milliseconds. The time duration from 52b auxiliary switch opening to
52a auxiliary switch closing is reported as Closing Travel Time, given in milliseconds. Closing Travel Time is the actual measurement
and is not modified by the A Input Delay. Total Closing Time is the sum of the Closing Time and Closing Travel Time measurements.
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