28
EN
ATySpM - 542935E - SOCOMEC
11.3.3. Three phase without neutral network
For three-phase networks without neutral (3NBL) 400Vac, a neutral must be recreated to allow the ATyS p 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 programmed in the SETUP Menu as neutral on the left or
neutral on the right and wired accordingly.
The example below shows the wiring for a product congured with neutral on the left.
I II
207
L32L22L12L31L21L11
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
207
RJ45
208 209 210 43 44
RJ
53 54 63 64 73 74
Source I Source II
ATySpM
Programmable
inputs
Programmable
outputs
Generator
stat relay
Load
In case of use with an auto-transformer, the following wirings have to be respected in order to maintain the control
of the rotation functionnality:
Neutral on the left
ATyS’ terminals
Rotation ABC Rotation ACB
Auto-transformer’s terminals
0V 7 7
230V 1 1
400V 3 5
Neutral on the right
ATyS’ terminals
Rotation ABC Rotation ACB
Auto-transformer’s terminals
0V 1 1
230V 7 7
400V 5 3