Network Configurations; Three Phase Without Neutral Network; Auto-Transformer Connections - socomec ATyS Series Installation And Operating Manual

11.3. Network configurations

Configuration of the network is done through the ATyS t M autoconfiguration feature. Refer to section «13.4.
Programming», page 26 .

11.3.1. 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.

11.3.1.1. Auto-transformer connections

Reference 1599 4121
I
2 A aM
RM1
-T1
0
230
400
400 / 230 V
400 VA
20 EN
Load
L1
2 4 6 8
1 3 5 7
N
RM32 2P
1 A aM
L11 L21 L31
Source I
L2 L3
2 4 6 8
1 3 5 7
N
L12 L22 L32
Source II
ATyS t M
Inputs
II
207 208 209 210 63 64
RM32 2P
RM2
1 A aM
-T2
400
230
0
400 / 230 V
400 VA
ATyS t M - 542931D - SOCOMEC
73 74
2 A aM