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Installation
D Countermeasures with 12-pulse Rectification against Harmonics Generation
(Only for 3G3HV Models Larger than 18.5 kW)
• 12-pulse Rectification
The 3G3HV-series Inverter with an output of 18.5 to 160 kW can employ 12-pulse rectification, which
suppresses harmonics better than reactors. The 3G3HV-series Inverter with an output of 15 kW or
less cannot employ 12-pulse rectification.
• Wiring Method
1. Terminals L1 (R) and L11 (R1), L2 (S) and L21 (S1), and L3 (T) and L31 (T1) are short-circuited with
short bars before shipping. Be sure to remove the short bars when employing 12-pulse rectification,
otherwise the Inverter will break down.
2. Do not ground the secondary winding side of the transformer, otherwise the Inverter may break
down.
With Input Transformer for 12-pulse Rectification
400 VAC
With Standard Transformers for 12-pulse Rectification
400 VAC
Note Use insulating transformers.
2-40
Input transformer for
12-pulse rectification
Star-star insulating
transformer
Star-delta insulating
transformer
www.dadehpardazan.ir 88594014-15
3G3HV
L1 (R)
T1 (U)
L2 (S)
T2 (V)
L3 (T)
T3 (W)
L11 (R1)
L21 (S1)
L31 (T1)
3G3HV
L1 (R)
T1 (U)
L2 (S)
T2 (V)
L3 (T)
T3 (W)
L11 (R1)
L21 (S1)
L31 (T1)
Chapter 2
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