Maintenance
Intervention on the operating mechanism
P51--3001EN/03
2/10
09--2011
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GRID
Position indicator statuses
Warning
CAUTION : despite the appearance of the symbol on the front, the FK3.07
springs are under load when stretched, they are tension springs rather
than compression springs. As the symbol has been standardised we must
use it to show the ‘loaded’ state of the spring.
Status ”A”
Circuit--breaker
Open
Closing spring
Armed
Status ”B”
Circuit--breaker
Closed
Closing spring
Unarmed
Status ”C”
Circuit--breaker
Closed
Closing spring
Armed
Status ”D”
Circuit--breaker
Open
Closing spring
Unarmed