Franklin Electric incon OPTIMIZER3, Руководство пользователя, Страница: 10 / 60

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CONTROL INPUT LOGIC MONITORING
The logical state of each Control Input is continuously monitored and compared with the Input Polarity settings, in the context of
the Input Mode setting. Based upon these settings, the Optimizer3 knows the normally expected logic state of each Input, when
the breaker is closed or open. If the voltage state of an Input violates its closed or open state for longer than 3 seconds, the A-B
Logic Alarm will activate. This alarm is self-clearing once the provoking condition returns to the normal state. A record of the alarm
is written in the Event History, along with the dates and times the alarm occurred and was cleared.
This A-B Logic alarm serves as a Trip Coil integrity monitor in Input Modes 2, 4, 5, 6 and 7. The normal voltage state of the Control
Input wired across the Trip Coil is low. The low impedance (approximately 50 ohms) of the Trip Coil, energized through the
high-impedance Red Light, will normally produce a very low voltage to the Optimizer3 Control Input. If the Trip Coil impedance
significantly increases or it becomes open-circuited, the voltage drop across the damaged coil will be high, causing the Optimizer3
to assert the A-B Logic alarm.
INPUT POWER, GROUNDING, ISOLATION
The Optimizer3 operates from station battery DC or AC station service. Nominal current draw is 0.5 amp. The power input
automatically accepts either AC or DC. Both power supply legs are fused. If external fuses are used, 3.15 amp slow-blow are
recommended. Power input leads are isolated from chassis and are floating and not referenced to ground.
Ground connection is internally connected to the metal chassis. It is recommended that the ground be connected to the station
ground or ground bar inside the circuit breaker cabinet. Follow the electrical grounding standard in effect at your utility.
All wiring connections are made to removable Phoenix connectors. The Optimizer3 may be electrically isolated by pulling out
all the connectors from their mating sockets. Follow the electrical isolation standard in effect at your utility. If fused-cutouts are
desired, locate them physically near the Optimizer3 with 3.15 Amp Slow-Blow fuses for all input and control wiring. The Optimizer3
uses a switch-mode power supply with universal input. On power-up, it draws more than nominal current for 1 mS. Slow-Blow
fuses are mandatory if external fuses are used.
IMPORTANT
: The Optimizer3 contains flash storage (SD card) for booting the device and saving data. Flash storage has the
potential to be corrupted under rare circumstances due to power loss while the software is writing to the SD card. The Optimizer3
has both hardware and software features to prevent corruption from occurring on boot-up or shut down.
The protection features begin working after 20 seconds of operation. It is important to make sure the power to the Optimizer3 is
solidly connected to terminals without the chance of disconnection and loss of power during the first 20 seconds of operation.