
Rev.06
35/226
The way that the circuit breaker is monitored becomes more or less complex depending on
whether it is fitted with no breaker contacts, one breaker contact (52a or 52b) or both (52a and
52b).
If no breaker contacts are used, the monitoring of the circuit breaker is made through the current
measurement. This is, if less than 8% of rated current is detected it is considered the breaker is
open and if more than 10% of rated current is available, it is considered the breaker is closed.
If only the circuit breaker 52a contact is available, it should be wired to the corresponding
physical input. This physical input is then assigned to the "52a Input” logical input. The 52b
logical input is calculated internally as the negative of 52a. The circuit breaker performance is
shown in the following finite state machine:
If only the circuit breaker 52b contact is available, it should be wired to the corresponding
physical input. This physical input is then assigned to the "52b Input” logical input. The 52a
logical input is calculated internally as the negative of 52b. The circuit breaker performance is
shown in the following finite state machine:
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Страница 8: ...www fanox com Rev 06 8 226 2 DIMENSIONS AND CONNECTION DIAGRAMS 2 1 Equipment front view...
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Страница 12: ...www fanox com Rev 06 12 226 Digital connections Only as an example...
Страница 13: ...www fanox com Rev 06 13 226 2 5 Terminals...
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Страница 224: ...www fanox com Rev 06 224 226 14 9 Comments Person in charge of commissioning Date Maintenance performed on the by...
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