Stop Sequence; Voltage Compensation - Danfoss Vacon NXP Applications Manual

General
1.9

Stop sequence

1.10

Voltage compensation

Grid Converter system will have voltage losses. Depending on the system, the losses may be more
than 50 Vac when operating close to Grid Converter nominal currents with low power factor between
points U3 and U5. This voltage loss needs to be compensated so that the grid voltage stays at
nominal. This also sets requirements for the needed DC link voltage.
24-hour support: +358 (0)201 212 575 • Email: vacon@vacon.com
Modulating
No
MCB Closed
Yes
Stop Request MCB Closed
Yes
Open MCB
No
Yes
Stop Modulation
(If Run State)
Open MCB
Yes
F64 A3
MCB Closed
(Delayed)
No
End
Figure 8. Stop sequence
F64 A4
No
F64 A2
(If DC > 85 %)
(Delayed)
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