T1689 Technical Manual Rev 07 Specification
MV3000 Air Cooled DELTA DELTA Rectifier Module
Page 41
2.9.2.3 External Requirements
• The output from all rectifier modules must be through a d.c. link inductor or an Interbridge
transformer
• The high voltage versions of the rectifier module require a 110V a.c. supply for the pre-charge
circuitry.
• For parallel operation of rectifier modules, external sharing reactors must be fitted;
• Similarly, for parallel operation of the two six-pulse rectifiers within a GDR633-4x01 and
GDR1168-4x01 modules, external sharing reactors must be fitted;
• For 12-pulse operation, the two supplies must be phase shifted by 30° to each other, and be of
balanced voltage. The d.c. output must be through an Interbridge transformer;
• Protection of the main input rectifier devices is by the addition of external semi-conductor fuses.
For recommended fuses, see Section 2.9.1.4: Current Ratings and Recommended Fuses;
• The a.c. and d.c. terminals on the modules are not suitable to support the weight of any attached
cables. These cables must have additional mechanical support;
• These modules must be cooled by an MVC3014-4001 fan assembly located above the unit.
2.9.2.4 Current Ratings and Recommended Fuses
Overloads are for 60 seconds, 6 times per hour equally spaced.
All ratings assume standard drive configurations using the recommended Interbridge transformers.
Parallel Ratings
Output current should be de-rated by 10% in the following circumstances:
• Two separate rectifier modules connected in parallel;
• Two halves of the same rectifier connected in parallel (6 pulse).
In systems with parallel rectifiers, a.c. line reactors will be required.
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