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6LE007621A
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9.3.3. Three phase without neutral network
For three-phase networks without neutral (3NBL) 400 VAC, a neutral must be recreated to allow the
HIC4xxA to operate at 230 VAC. To recreate the neutral, we recommend the use of quantity 2x 400 VA
auto-transformers connected as shown below. The neutral position must be defined as neutral on the
left or neutral on the right in advance and then wired accordingly. The example below shows the wiring
for a product configured with neutral on the left.
A new product must have the neutral configuration pre-programmed as on the left or on the right at the first
start up using a real (not a recreated) 3 phase + neutral supply.
9.3.4. Auto-transformer connections
Load
I
II
207
L32
L22
L12
L31
L21
L11
L1
2
4
6
8
1
N
N
3
5
7
2
4
6
8
1
3
5
7
L2
L3
208 209 210
0
230
400
-T2
400 / 230 V
400 VA
63 64
73 74
0
1 A aM
1 A aM
230
400
-T1
400 / 230 V
400 VA
2 A aM
2 A aM
HIC4xxA
Genset
start
Product
available
Inputs
Common
Inhibition
P
riority/
retr
ansfer
P
riority/t
est
Source I
Source II