ABB AMVAC Installation And Operation Manual page 16

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ACKAGES
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AMVAC circuit breakers are available with three control packages. The standard package (package 1) comes as an
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ADVAC (spring stored energy mechanism) replacement circuit breaker. It comes with all functions of an ADVAC
circuit breaker having one secondary disconnect. There are 2 versions of package 1, with or without trip coil monitoring.
The optional package (package 2) includes everything in package 1 with a total of 9a and 8b auxiliary contacts (approx.
5 to 10 amps) for customer use. This package directly replaces an ADVAC
connects. Package 3 is an AMVAC
detail regarding the wiring and termination points for each package.
C S :
ONTROL CHEME
TM
AMVAC circuit breakers are similar in switching control to standard spring stored energy mechanisms as indicated by
the Sequence of Operation in Chart 1.
Notes for Chart 1: Once the capacitors are charged (<10amps), the control power will experience a constant drain of
approximately 2mA in lieu of a typical motor circuit of a spring stored energy mechanism requiring impulse currents up to
20amps. The capacitor voltage will vary 5 to 10Vdc during switching operations allowing for fast recharge and reclose
schemes. The opening and closing coils are operated via the storage capacitors and thus only require a minimal signal
(24V min) to operate. The nominal circuit breaker closing and opening times are typical at 55ms and 40ms respectively.
16
STRUCTURE AND FUNCTION
TM
circuit breaker with all control board options available. See Appendix D for more
(Refer to Chart 1)
Chart 1: Sequence of Operation
1VAL050601-MB Rev C
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circuit breaker having two secondary dis-
(not to scale)
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