Delta NT Series User Manual

Chapter 8 Optional Accessories
100
Chapter 8 : Optional Accessories
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suggested.
The 12-pluse rectifier is composed of one transformer and two rectifiers. After
receiving the AC input power, the transformer will (1) transfer the input voltage into
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total input current harmonic distortion considerably.
In general, the total input current harmonic distortion is about 32~38% with use
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harmonic distortion to 10~18%.
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Y
RECT 1
RECT 2
DC BUS
AC INPUT
8.2 Input Harmonic Filter
Besides the 12-pluse rectifier, the passive-type input harmonic filter (L-C filter) is
another solution to reducing the total input current harmonic distortion. Moreover, it
is also a means to improve the input power factor of the UPS.
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passive-
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Delta NT Series Specifications

General

Brand	Delta
Model	NT Series
Category	UPS
Language	English