T1689 Technical Manual Rev 07 Specification
MV3000 Air Cooled DELTA DELTA Rectifier Module
Page 33
2.9 DELTA RECTIFIER MODULE
Unit covered: MVR1600-4601
GDR391-4401 & -4601
GDR633-4401 & -4601
GDR721-4401 & -4601
GDR872-4401 & -4601
GDR1168-4401 & -4601
In a DELTA drive system, rectifier modules are used in network bridges to convert an a.c. supply into a rectified,
unsmoothed d.c. supply. See Figure 2–7.
The rectifier module is available either as a single bridge or as a double bridge, each in several ratings. Larger
rectifier power ratings can be achieved by connecting the modules in parallel (derating will be necessary). See
Section 2.9.1.4: Current Ratings and Recommended Fuses.
Each module has either:
• A three-phase, six pulse rectifier, with individual a.c. input terminals and two d.c. terminals (d.c.
positive and d.c. negative)
• A pair of three-phase, six pulse rectifiers, with two sets of individual a.c. input terminals and four
d.c. terminals (d.c. positive and d.c. negative for each six pulse rectifier bridge). The d.c.
connections must be connected by the end user with appropriate interbridge components.
The rectifier module may be operated as a 12-pulse network bridge. This configuration is achieved by
connecting the d.c. positive outputs together through an interbridge transformer and one a.c. input being
phase-shifted in relation to the other by an external supply transformer.
Two types are available and are detailed separately.
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