6.6.6 Functional description
The pre-charging contactor (K2) is switched by applying a 24 V DC voltage to the cou-
pling relay (K1). If the DC link voltage reaches an adjustable value (480 V DC at factory
setting LE.04) output O1 is set and the coupling relay switches (K5). K5 disconnects the
pre-charging contactor K2 and switches the main contactor K3. Further charging of the
DC link is done via the main contactor and AIC or LCL filter.
The modulation is suppressed via internal programming (OA, IA) as long as an adjust-
able threshold value (LE.04) is reached and a responding waiting period (di.48) has
expired.
The control release is set by switch (S1), if the pre-charging contactor K2 drops out and
the main contactor has tightened. A delay time (di.42) starts simultaneously with the
control release by input I2 after that the modulation is released.
Phase position and phase sequence (counterclockwise/clockwise) of the mains voltage
are detected now. Thereafter, the DC link voltage is controlled to the preset setpoint
(oP.03). If this value is reached, the relay output 2 (R2) switches after one second. The
drive converter can modulate if the external control release of the drive converter (S4)
is set.
Flow chart switch-on procedure
S1
S4
Modulation (AIC)
K1
K2
O1 (AIC)
R2 (AIC)
OA->IA (AIC)
LE.00/04
565V
oP.03 (680V)
5s (di.48)
5s (di.42)
U
dc
1s
K3
Figure 13: Flow chart switch-on procedure
48
CONNECTION OF THE COMbIVERT F5-AIC
Summary of Contents for COMBIVERT F5 Series
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