ABB FSK II +, Operating And Maintenance Manual, Page: 24 / 32

PRODUCT FAMILY: FSK II +
- OPERATING AND MAINTENANCE MANUAL 24
PRODUCT FAMILY: FSK II +
- OPERATING AND MAINTENANCE MANUAL 24
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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
(COthr < U < OCO
thr
)
allowed flashing closed allowed flashing closed
Sufficient for O
(Othr < 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
—
7. Assembly & Commissioning
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.
7.3.9. Manual Operation
For a manual disconnection, the emergency crank
is to be used. It is not suitable for storing
outdoors and should be kept with the accessories
of the corresponding switchgear installation.
The apparatus can only be switched off
manually, but not switched on