54
For some test operations, the following data is produced:
Figure 64
– Open and Close Travel Data
The Optimizer3 divides 82 mm stroke by 26 mS Opening Travel Time to get 3.15 millimeters per millisecond (or meters per second).
The Optimizer3 divides 82 mm stroke by 33 mS Closing Travel Time to get 2.16 millimeters per millisecond (or meters per second).
The breaker instruction book gives a calculation of 3 meters per second for an open operation and 2 meters per second for a close
operation. The Optimizer3 gives a very good approximation of the Opening and Closing Velocities.
CURRENT AND VOLTAGE LOGGING
The Optimizer3 is continuously monitoring its power supply voltage and the phase currents.
• Every two hours, the power supply voltage and the phase currents are logged in the database.
• Each day, the minimum, maximum and average power supply voltage and phase currents are calculated and logged in the
database.
• As the Optimizer3 monitors the phase currents, while the breaker’s main contacts are interrupting a fault, the highest measured
current value for each phase is recorded as Peak Current (Φ A,B,C). The Peak Current is measured only during the Arc Time. The
time duration of the Peak Current is not recorded – only its amplitude. This is a different measurement than the I²T but occurs
during the same (Arc) time period.
This data is available for download from the Export page. Choose the items for download from the Available Data list, set the
desired Date Range and then click the Export button at the bottom of the page.
• Average Power Supply Voltages are downloaded by clicking “Voltage Monitor Continuous Metrics” and selecting “Supply
Voltage” instead of a sensor.
• Average Phase Currents are downloaded by clicking “Circuit Breaker Current History”.
• Peak Phase Currents are downloaded by clicking “Phase X Peak Current”.