ABB AMVAC Technical Manual page 7

Proximity sensors
provide highly reliable
armature position
information to the
electronic controller.
AMVAC. Circuit-breaker of
the high tech generation.
The electronic controller uses robust components and circuit board con-
forming coatings to prolong the life of the device. The electronic con-
troller will operate on AC or DC control power because it utilizes an AC
to DC converter internally. Instead of selecting from a long list of control
power options, the user only needs to select a controller for low voltage
control power (38-56 VDC) or a controller for high voltage control power
(104-254 VAC or 100-250 VDC). Inside these ranges, the user may apply
any value of direct current, or any value of 50 or 60 cycle alternating cur-
rent to achieve circuit breaker operation. The electronic controller incor-
porates all capacitor charging, open/close coil switching, anti-pumping,
interlocking, and armature position details. Self-monitoring functions are
programmed to monitor proximity sensors, the microprocessor, and other
key functions with annunciation and/or circuit breaker opening possible.
Radio frequency and transient testing has been performed on the electron-
ic controller to ensure that it is resistant to such abnormal conditions. The
electronic controller demands up to 100 watts of peak power during
capacitor charging; less than 10 watts of power is needed to maintain 10
amperes peak during capacitor charging; only four watts of energy is
needed to maintain controller functions and capacitor full charge.
Notes:
All contacts are shown with the breaker in the OPEN & READY unless
otherwise specified.
* Coil Monitoring Device cannot be used and will be recognized as a
Close or Open Signal.
** READY Contact is CLOSED when the breaker is ready for operation.
"READY" monitors control power, capacitor voltage, Close & Open Coils
& uP Watchdog.
*** NOT READY Contact is CLOSED when the breaker is not ready for
operation.
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