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7.3.4. Control of the output power driver
The status of the output power drivers is checked to verify that they are not in a status that could prevent
switching operation.
This is carried out:
•
On powering the equipment
•
Immediately after an opening operation
•
Immediately before a closing operation
•
Every 6 hours
7.3.5. Unsuccessful closing operation
This function is always active. It performs in case of wrong position an autotrip function. This operation checks
the correct position of the sensors at the end of the operations (after 95ms from the starting of the current
injection in magnetic actuators).
If the position is incorrect (i.e. both position sensors off = intermediate position) an automatic open (autotrip) is
performed. If this opening is not performed correctly the status go to NOT READY and no other operation is
allowed.
After 10 autotrip operations the Ready LED is turned off and the unit go in NOT READY condition. In this case it
is necessary to reset the unit (remove the auxiliary supply and discharge the capacitors).
Opening failed: Other opening operations will be launched until the opening inputs remain active.
Closing failed: An Auto-Trip opening is performed. For another closing attempt it is necessary to reactivate the
closing signal.
Note: The memory of the number of operations is only reset after disconnection of power supply and discharge of
the capacitor bank.
Even after one successful operation the unsuccessful operation counter is continuing to increment the counter.
7.3.6. Valid signal window
A LOCAL or REMOTE opening & closing signals are accepted on rising edge.
7.3.7. Capacitor Charge and Operating conditions
Capacitor charge and the corresponding operating states and possible operations according to the following
table.
Apparatus
ON
OFF
Capacitor charge:
operation
LED "READY"
READY
contact
operation
LED "READY"
READY
contact
Sufficient for O-CO
(U > OCO
thr
)
allowed
on
closed
allowed
on
closed
Sufficient for CO
(CO
thr
< U < OCO
thr
)
allowed
flashing
closed
allowed
flashing
closed
Sufficient for O
(O
thr
< U < CO
thr
)
allowed
flashing
closed
blocked
off
open
Not sufficient for any switching
action
(U < O
thr
)
blocked
off
open
blocked
off
open
Table 18 “Ready“ signal dependent on the capacitor charge
The above table is valid when the UV function is
enabled
.
Note:
When the UV function is
disabled,
the UV input is always High.
7.3.8. Auxiliary Voltage Interruption (auxiliary voltage for the capacitor charge)
Approximately one second after a voltage interruption, a corresponding signal occurs over the signal outputs S5
or S7 (compare with a valid diagram).
It is then possible to open the apparatus, by means of remote signals or by using local push buttons, within
approximately
1.5 - 2 minutes
. After expiry of this time period, the apparatus can then only be opened manually
with the help of the manual tripping crank.
Summary of Contents for FSK II S +
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