7
vacon • 52
LOW HARMONIC CABINET DRIVE
Tel. +358 (0) 201 2121 • Fax +358 (0)201 212 205
7.1.1
Manual operation (MAN)
The operator can control the circuit-breaker (MCCB) and the charging circuit manually from the
cabinet while the MCCB control switch –S6 is in
Man
position. The
0–1-Start
switch is used for the
local operation of the MCCB and pre-charging circuit.
Figure 26. 0-1-Start Control switch (-S10)
Turning the switch –S10 into position
0
will open the circuit-breaker if it is closed or stop the
possible ongoing pre-charging regardless of the selected control place/manner.
Turning the switch into position
1
enables the pre-charging and the circuit-breaker to be controlled
by the selected mode of the
REM-MAN-AUTO
selector switch.
Turning the switch into position
Start
will start the pre-charging of DC busbar. The pre-charging
takes about 5-10 s depending on the size of the drive. When DC voltage has reached a certain level
the AFE control unit will automatically close the circuit-breaker. The
Start
position of the switch is
spring-retuned and the switch will automatically return to position
1
when released. The pre-
charging can be aborted by turning the switch to position
0
. In case of a blackout in the supplying
network, the under-voltage release coil will open the circuit-breaker. Pre-charging and MCCB
closing have to be activated by the operator when the supply is energized.
The
AFE Ready
LED will illuminate when the MCCB is closed and AC power is connected to the AFE
unit and there are no active faults. The AFE ready LED works in the same way irrespective of the
operation manner/place.
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