Transformer Parameters - Danfoss Vacon NXP Applications Manual

Description of parameters
5.1.1

Transformer parameters

These parameters are used to scale voltage so that the parameter P2.1.1 Grid Nominal Voltage can
be given a value as actual grid voltage. The drive will calculate the actual drive terminal voltage
based on these values.
NOTE: When ration is different than 1:1 also P2.1.7 System Nominal DC parameter must be given so
that MCB is closed at correct voltage level and AFE mode DC Voltage reference will give correct DC-
Link Voltage.
2.1.9 Transformer GC Side Voltage
Set the transformer nominal voltage on Grid Converter side (U4).
2.1.10 Transformer Grid Side Voltage
Set the transformer nominal voltage on Grid side (U5).
2.1.11 Transformer Phase Shift
Set the transformer phase shift. Difference in angle, between U3 and U5. When OPT-D7
measurement is connected to U5 (i.e. to ship grid). This information is used if OPT-D7
assisted AFE start synchronization is activated. Usually Dyn11 transformer has 30.0
degree phase shift.
NOTE: Synchronization to external grid will use different set of parameters for phase
shifts.
Q2
SG Filter
U1
24-hour support: +358 (0)201 212 575 • Email: vacon@vacon.com
~
U2 UDC
=
Figure 11.
ID1850
ID1851
ID1852
T1
D7
U4
U3
Filter
U4 = Transf. GC Side
U5 = Transf . Grid Side
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U5
Q3
Q1
T2
5