Power Electronics SD700 Series - Page 42

SD700 SERIES
POWER ELECTRONICS
40
POWER CONNECTION
6.5. Multipulse drives
This section specifies the technical characteristics that may be considered by the installer to select the
appropriate transformer for a multipulse drive. The configurations given in this section are recommendations.
The user could use another configuration that may not appear in this section.
6.5.1. 12 Pulses Configuration Example
General characteristics:
 Suggested Vector Diagram: Dd0/Dy11
 Nominal Secondary Windings Voltage (V): 3xVn
1
 Recommended Tap Voltage on Primary Side (%): ±10%
 Total Nominal Current (A): In (A)
 Total Overload (A): 120% ND (60 seconds)
150% HD (60 seconds)
 Short Circuit Impedance (%): < 7%
 Secondary Winding Power Factor: 0.90
 Recommended Rated Power (kVA): +20% Motor Power
SD700 12 pulses connection scheme:
Figure 6.12 SD700 12 pulses
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For improved performance, it is recommended to increase a 3% the nominal secondary voltage.