
ATyS g M - 542933D - SOCOMEC
29
EN
11.3.4. Three phase without neutral network
For three-phase networks without neutral (3NBL) 400Vac, a neutral must be recreated to allow the ATyS M to operate at
230Vac. To recreate the neutral, we recommend the use of quantity 2x 400VA 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.
11.3.4.1.
Auto-transformer connections
Reference 1599 4121
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
RM32 2P
1 A aM
RM32 2P
1 A aM
230
400
-T1
400 / 230 V
400 VA
RM1
RM2
2 A aM
2 A aM
Load
Source I
Source II
ATyS g M
Pr
oduct
available
Inputs
Common
Inhibition
Priority/
retransfer
Priority/ test
Genset start
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