Mains Isolation - Lenze 4800 Manual

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15.9

Mains isolation

15.9.1 Tipping with mains isolation
In this application proposal, the power stage is connected to or separated from
the mains through a tipp command (momentary-contact pushbutton S4). Since
the control electronics and the field supply are ready for operation when the mains
switch is on, the tipp command only delays the signal of the mains contactor.
Controller preparation:
( With controllers 4902...4907 (PCB 4902LP, 4903LP or 4905LP), remove
( With controllers 4X08...4X13 (PCB 4908LP oder 4911LP), remove the
To get to the bridges to be removes, observe the following steps:
( Open the controller cover (4 fixing screws)
( Loosen 2 screws fixing the flap of the control electronics
( Open flap
Stop!
( Ensure correct phase connection of mains supply.
( The phase angle of the voltages in power stage and control electronics
( Before opening or closing the contactor K1, the controller must be
( In tipping operation with K! the electronics remain supplied.
( With this application, a voltage is continuously applied to the field.
the wire bridge between BR1, BR2, BR3, BR4 and BR5 when no voltage is
applied.
bridges BR3, BR4 and BR5 when no voltage is applied.
(Wrong connection leads to fuse tripping).
must be lower than 2• electrically.
inhibited via the function "controller enable". Ith this switching sequence is
not observed, fuses may trip or the fault message ACI may be indicated.
The main switch separate the controller from the mains.
Activate standstill excitation (field heating)!
Selection aid
48XX/49XXSHB0399
15-23