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Connection diagram with 12-pulse rectifier power transformer
The FR-CC2 converter unit can be run with 12-pulse rectifier power supply.
Main circuit terminal
Control circuit terminal
3-phase
AC power
supply
*1
When using separate power supply for the control circuit, remove the jumpers connected to terminals R1/L11 and S1/L21.
12-pulse rectifier power transformer
For 12-pulse applications, a 12-pulse rectifier power transformer (3-winding transformer) is required (customer's pur-
chase).
To prevent imbalances in output current from the power transformers, adjust the current as follows.
– Control imbalances in output voltage from the power transformers to within the range of ±0.5 %.
– Control an imbalance in power impedance (%Z) to within the range of ±10 %.
Connection is not available
MC
MCCB
R/L1
S/L2
T/L3
R1/L11
Jumper
S1/L21
*1
MC
MCCB
R2/L12
S2/L22
T2/L32
Earth
(Ground)
P1
DC reactor
Inrush
P/+
current limit
circuit
N/-
Power circuit for
control circuit
ON
ON
EMC filter
ON/OFF
connector
OFF
OFF
Main circuit
WIRING
Inverter
P/+
N/-
7
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