The Riello MASTER SWITCH 100-600A from Critical Power Supplies is a static transfer switch commonly used within power continuity applications to improve resilience. The system can be used in conjunction with UPS or as separate standalone devices.

OPERATING PRINCIPLE – MASTER SWITCH adds a source of redundancy to a critical installation and automatically transfers the connected load between two separate AC power sources. The transfer can be automatic when an input power supply fails outside set tolerances or be manually forced using the front panel keypad or remotely via a communications network.

PROTECTION AGAINST POWER FAILURES – In the event that one of the two power sources does not return to the accepted tolerance values, the MASTER SWITCH will transfer the other loads over to the second power source (this happens instantly if the two sources are in phase).

PROTECTION AGAINST ENVIRONMENTAL DISTURBANCES – Overloads and load faults. In the event of an overload or fault condition, the internal protection system within the STS device can be configured to disconnect power at defined levels. In the extreme situation of a downstream short circuit MASTER SWITCH can disconnect the load to prevent disruption.

Features and Benefits.

Riello MASTER SWITCH has double redundant ventilation called “fan redundancy plus”. Thanks to this function, in the remote possibility that two fans both fail at the same time, the others would still be able to dissipate the heat generated at nominal load. The fans can be hot swapped so as to ensure no break in system operation during the repair.
- Easy front access
- power cable connections are easily accessed with entry from below
- board slots are positioned in a dedicated area to allow rapid diagnosis/replacement
- all parts subject to controls, maintenance and/or replacement.