Vacon nxp/c, Руководство пользователя

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7
vacon • 54 LOW HARMONIC CABINET DRIVE
Tel. +358 (0) 201 2121 • Fax +358 (0)201 212 205
Figure 28. Circuit diagram of remote contacts for the control of the MCCB and pre-charging
circuit (NXC low-harmonic FR12)
In case of a voltage drop of <0.7xU
N
or a blackout in the supplying network, the undervoltage
release coil will open the circuit-breaker and pre-charging and MCCB closing has to be activated
by the remote charging pulse when the supply is energized.
7.1.3 Automatic operation (AUTO)
The pre-charging and closing of the circuit-breaker is automatically done when the
REM-MAN-
AUTO selector switch is in AUTO position and the supply voltage is energized. The pre-charging of
the units will automatically (directly) start when the control switch -S6 is turned into
Auto
position.
The AFE unit will automatically close the circuit-breakers after DC voltage has reached a certain
level and the AFE READY LED will illuminate.
The unit will re-charge automatically and close the circuit-breakers if the main supply voltage has
been cut and turned back on (e.g. voltage drop in the network). The 0-1-Start switch has to be in
position
1 which enables automatic function.
Turning the switch –S10 to position
0
will open the circuit-breaker even if the
REM-MAN-AUTO
selector switch is in
AUTO
position.
-X1
-X1
57
58
60
61
MCCB Open
MCCB Close
(Charging pulse)
11509_uk