Socomec ATyS S: small-genset remotely-operated transfer switch
ATyS S is Socomec’s remotely-operated transfer switching equipment (RTSE) for small genset applications, rated up to 125 A at 4 poles and 400 VAC. ATyS d S is the same product line with a dual power supply (DPS) option for the control circuit itself.
Technical specification
| Model | Current | Poles | Voltage | Transfer time | Type | Mounting | Control / comms |
|---|---|---|---|---|---|---|---|
| ATyS S | Up to 125 A | 4 | 400 VAC | – | DIN-rail / panel | Panel | Remotely-operated (RTSE) |
| ATyS d S | – | – | – | – | DIN-rail / panel | Panel | Remotely-operated, dual power supply (DPS) |
Source of the values: Socomec ATyS S datasheet. ATyS S is confirmed up to 125 A, 4-pole, from Socomec’s own datasheet. ATyS d S is the dual-power-supply variant in the same family; its specific rating was not confirmed in the documents we hold. An en dash means the manufacturer does not publish that value in the source we hold; we do not fill it in with an estimate. Confirm every figure against the current manufacturer document before it is written into a contract.
The references we quote in this family are ATyS S and ATyS d S. Send us the load, the phase and the transfer requirement, and we will confirm availability and lead time.
Which one should you choose?
Remotely-operated means the switching components integrate the drive, not that it lacks local control
The disconnect and switching components are integrated in the ATyS S body itself, which reduces the wiring and footprint compared to a separate motor-drive mechanism bolted onto a standard switch. This is a mechanical design choice, not a statement about how the switch is normally operated day to day.
This is sized for small genset backup, not a large facility transfer
At up to 125 A, ATyS S fits a small building or a single critical circuit backed by a genset, not a facility-wide transfer. For a larger genset or transformer management role, the ATyS t/g family covers 125 to 3200 A instead.
The dual power supply variant protects the control circuit, not the load circuit
ATyS d S’s DPS option is about ensuring the switch’s own control electronics stay powered from either source, which matters in an edge case where the control circuit’s single power feed could otherwise fail independently of the main transfer logic. Ask about this specifically if the installation has a documented history of control-power issues.
Confirm the exact ATyS S current rating against the 125 A ceiling before ordering
The datasheet we hold confirms the family tops out at 125 A but the specific reference shown in Socomec’s own material (a 40 A model) illustrates that the range includes smaller ratings too. Confirm the exact amperage needed rather than assuming every ATyS S unit is rated at the family ceiling.
Where it fits, and where it does not
Fits a small building or single critical circuit backed by a genset, needing a compact remotely-operated switch up to 125 A. Does not fit a facility-wide genset or transformer management role; see the ATyS t/g family for that higher-current range.
What we need in order to quote it
- Load current, up to 125 A
- Whether the control circuit needs its own dual power supply (ATyS d S)
- Number of poles and earthing arrangement
- Whether this is genset backup for a small building or a single circuit
Request a Quote
Tell us the usable capacity, the protocol and the delivery country. A priced quote comes back within 48 hours, usually with a second option so the trade-off is visible.
