Vector Group For Step-Down Transformer - Deif GPC-3 Designers Reference Handbook

GPC-3 DRH 4189340587 UK
Parameter
6002
6003
6004
6041
6042
6043
6044
6051
6052
6053
9141
The ML-2 controller can directly handle voltage levels between 100 and 690 V. If the voltage lev-
el in the application is higher or lower, it is required to use measurement transformers that
transform the voltage into a number between 100 and 690 V.

4.20.4 Vector group for step-down transformer

In some applications, there may also be a step-down transformer. This could be to transform a grid voltage
down, so the load can handle the voltage level. The ML-2 controller is able to synchronise the busbar with the
mains, even if there is a step-down transformer with a phase angle twist. The transformer must be between
the measuring points for ML-2. If a step-down transformer is used, these settings will must be set in parame-
ter 9141 to compensate the phase angle twist.
Vector group
0
1
2
4
5
6
7
8
10
11
If a step-down transformer is mounted with an ML-2 genset unit, the settings shown in the table
above should also be used.
DEIF A/S
Generator nominal power
Generator nominal current
Generator nominal voltage
LV measurement transformer primary side (There is none here)
LV measurement transformer secondary side (There is none here)
Current transformer primary side
Current transformer secondary side
HV (BB) measurement transformer primary side
HV (BB) measurement transformer secondary side
Nominal HV setting of step-up transformer
Phase angle compensation
Step-up transformer types
Yy0, Dd0, Dz0
Yd1, Dy1, Yz1
Yd5, Dy5, Yz5
Yy6, Dd6, Dz6
Yd7, Dy7, Yz7
Dd10, Dz10
Yd11, Dy11, Yz11
Comment
Dd2, Dz2
Dd4, Dz4
Dd8, Dz8
Additional functions
Setting
140
250
400
400
400
300
5
10000
100
10000
120 °
Parameter 9141
0 °
-30 °
-60 °
-120 °
-150 °
180 °
150 °
120 °
60 °
30 °
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