Master Switch STS THREE-PHASE Static Transfer Switch Service 1st start HIGHLIGHTS • High reliability • Hot Replacement function • 3 or 4 poles version • Advanced communications Installing a Master Switch static transfer switch provides additional resilience and protection from the disruption that can be caused by the failure of a single power source. The result is the absolute protection of industrial utilities and critical information technology against power supply and load faults. OPERATING PRINCIPLE Master Switch guarantees a source of redundant power, allowing the load to be switched between to alternative and independent power sources. Switching can be automatic (when a supply source falls outside of acceptable tolerances) or manually done by an operator from the front panel or remotely. PROTECTION AGAINST POWER SUPPLY FAULTS If one of the two power sources falls outside tolerance levels, Master Switch will transfer the consumers to the second power source (switching is instantaneous if the two sources are in phase). PROTECTION AGAINST ENVIRONMENTAL DISTURBANCES In the event of an overload, the user can decide the level of intervention of the internal protection devices in order to block the power supply. In the extreme case of a downstream short circuit, Master Switch disconnects the load in order to avoid jeopardising the operation of the other loads (i.e. in the event of poor selectivity of the protection devi

TOTAL MICROPROCESSOR CONTROL Microprocessor control logic ensures: • ast and safe switching between power F sources; • onitoring of all parameters via LCD M display; • onstant monitoring of SCR operation C • dvanced remote diagnostics (RS232 and A TCP/IP). REDUNDANT DESIGN Power is supplied to the internal logic by two physically separate supply circuits that are fully independent and that can be replaced in “hot replacement” mode without causing power supply interruptions to the load. In the event that the power supplied by both sources fails, full system operation is guaranteed by the “Power...

MASTER SWITCH IN REDUNDANT MODE The secondary power source [AS], although highly reliable, only powers the load in the event of a failure with the priority power source [PS], ensuring maximum redundancy and power quality to the loads. MASTER SWITCH IN CROSS FEEDING MODE The two sources power critical loads using Master Switches configured to selected one of the two power sources as the priority source [PS]. In case of a failure in one of two sources, the other will be able to supply power to all the loads connected to the system. MASTER SWITCH IN BACK-UP MODE Independent separate lines Master...

OPERATING SPECIFICATIONS Nominal Current [A] Transfer type “Break Before Make” (no overlapping sources) Available transfer methods Automatic / Manual / Remote INPUT Rated voltage - sources S1/S2 [V] Switched input phases 3 ph+N (four poles version) - 3 ph (three poles version) Input frequency tolerance range Distribution compatibility OVERALL SPECIFICATIONS Weight [kg] three poles version Weight [kg] four poles version Dimensions (WxDxH) [mm] Communications 685x580x1770 RS232 / Relay contacts port Ambient temperature Range of relative humidity Colour Noise level at 1 m [dBA ±2] IP rating Efficiency...