Georator Triathlon III Instruction Manual page 14

AC
INPUT
12-PULS E FULL CONTRO L RECTIFIER
In order to further improve the power factor and reduce harmonic current drawn by the
rectifier, UPS at 100KVA and above, use the 12-pulse full controlled rectifier. The total
current harmonic current can be reduced to around 15%, and power factor improved to
over 0.8. A phase shift transformer is added to achieve this performance. The input
inductor is retained also to obtain the best result. Although this results in higher cost,
the unit is much more reliable and rugged. Users do not need to increase the input
breaker and cable sizes, since input KVA and harmonic current drawn is minimized,
fulfilling the worldwide energy saving requirements.
The harmonic current can be further lowered by adding harmonic filters (factory
installation available). The total harmonic current can be reduced to approximately 9%.
Another alternative method to reduce the harmonic current (especially for very large
KVA UPS) is to employ 18-pulse full controlled rectifier (available as an option). The
total harmonic current can be reduced to approximately 7%.
PH ASE SH IFT
TRANSFO RMER
RECTIFIER
BREAK ER INDUCTO R
SCR
SCR
1-9
DC
O UTPUT
CAPACITO R