Active redundancy principles
Upsilon STS™ supplies a number of loads from one of two independent and redundant sources. It ensures no-break transfer from the preferred source to the alternate source in either automatic mode (according to user settings) or manual mode.

Advantages
> secure maintenance by de-energising a part of the installation for servicing;
> simplified maintenance because servicing is fast and does not require interrupting power to the load;
> improved power availability and possible upgrading to higher ratings;
> no risk of fault propagation from one source to the other.

No-break transfer
Upsilon STS™ uses the "break before make" technique which ensures no source overlapping, i.e. the sources are never in parallel during transfer. This function eliminates any risk of fault propagation between the two sources.
Upsilon STS™ guarantees transfer in just three milliseconds, i.e. three times faster than required by IEC international standard 62040.
Upsilon STS™ uses the "break before make" technique which ensures no source overlapping, i.e. the sources are never in parallel during transfer. This function eliminates any risk of fault propagation between the two sources.
Upsilon STS™ guarantees transfer in just three milliseconds, i.e. three times faster than required by IEC international standard 62040.

Standard functions
> continuous monitoring of the sources (eleven parameters, etc.);
> manual or automatic source transfer and return with no break in the supply of power;
> rolling-switch function for secure transfer between desynchronised sources;
> redundant internal STS functions (power supply, controls, fans);
> isolation switches for maintenance;
> oversized neutral conductor;
> graphic LCD screen and multilingual display for easy and user-friendly access to the information and setting screens;
> animated mimic panel for immediate information on system status;
> two slots available for communication cards;
> JBus/Modbus (RS232 or RS485) and dry-contact (six 250 V 2 A relays) communication interfaces.

Optional equipment
> Top-feed wiring;
> JBus/Modbus, dry-contact (six 250V 2A relays) communication cards
> PDU power distribution unit (36 x 16 A circuit breakers, can be installed in the 1900 mm cabinet up to 100 A);
> PMM distribution cabinet