STS3000 Static Transfer Switch
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Highlight
- High reliability
- Hot Replacement function
- 3- or 4-pole version
- Advanced communications
Installing a STS3000 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
STS3000 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, STS3000 will transfer the consumers to the second power source (Switching is instantaneous if the two sources are in phase). Overloads and load faults In the event of an overload. T 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 STS3000 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 devices). Total Microprocessor Control Microprocessor control logic ensures: 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 Supply back up” function, which provides auxiliary power supply to the circuits from an external, independent power source. STS3000 is equipped with a dual redundant ventilation system known as: “fan redundance plus”. Thanks to this feature, and in the unlikely event that two fans fail at the same time, those remaining would still be able to dissipate the heat generated at nominal load and with an ambient temperature of up to 40° C. Also the fans can be replaced in “hot replacement” mode, ensuring continuity during the replacement operation. In the event of an output short circuit, Master Switch blocks the transfer between the two power sources, eliminating the risk of propagating the short circuit and its effects to the other loads. A back feed control circuit ensures the automatic intervention of the protection devices when a return of power to one of the two Master Switch inputs is detected. The layout of the moving components and parts is designed to ensure easy frontal access: STS3000 provides information, measurements, statuses, and alarms via the LCD display. The STS is compatible with PowerShield3 supervision and shutdown software for Windows operating systems 10, 8, 7, Hyper-V, 2019, 2016, 2012, and previous versions, Mac OS X, Linux, VMWare ESXi, Citrix XenServer and other Unix operating systems. 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. The two sources power critical loads using STS3000 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. The SATRON UPS solution guarantees maximum reliability and ensures continuity of power supply under all operating conditions thanks to the UGS option that keeps the two systems, A and B, perfectly synchronized. The flexibility of the UGS system ensures synchronism between the sources even when one of the two systems is not a SATRON UPS model, but made by another manufacturer, or when the input sources are not from uninterruptible power supplies.
Advanced Communications
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Model |
STS100 |
STS150 |
STS200 |
STS250 |
STS300 |
STS400 |
STS600 |
STS800 |
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NOMINALCURRENT |
100A |
150A |
200A |
250A |
300A |
400A |
600A |
800A |
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INPUT |
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Rated voltage - sources S1/S2 [V] |
380 / 400 / 415 three-phase + N |
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Voltage tolerance [V] |
180 / 264 (selectable) |
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Switched input phases |
3+N (4-pole) - 3 (3-pole) |
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Rated frequency [Hz] |
50 / 60 |
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Input frequency tolerance range |
±10% (selectable) |
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Distribution compatibility |
IT, TT, TNS, TNC |
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OPERATING SPECIFICATIONS |
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Transfer type |
“Break Before Make” (no overlapping sources) |
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Available transfer methods |
Automatic / Manual / Remote |
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Transfer time following source failure |
<4 msec. (S1/S2 synchronised) 10 msec. (S1/S2 non synchronised) |
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ENVIRONMENTAL SPECIFICATIONS |
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Efficiency @ full load |
>99% |
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Noise at 1 m from front (from 0 to full load) [dBA] |
55 |
55 |
55 |
55 |
55 |
55 |
<60 |
<62 dBA |
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Storage temperature |
-10 °C up to +50 °C |
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Ambient temperature for the UPS |
0 °C - +40 °C |
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Range of relative humidity |
5-95% non-condensing |
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Max. installation height |
1000 m at nominal power (-1% power for every 100 m above 1000 m) - Max 4000 m |
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Reference standard |
EN 62310-1 (safety) EN 62310-2 (electro-magnetic compatibility) |
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OVERALL SPECIFICATIONS |
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Weight [kg] 3 pole Type |
150 |
155 |
195 |
200 |
225 |
230 |
340 |
515 |
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Weight [kg] 4 pole Type |
155 |
160 |
205 |
210 |
235 |
240 |
375 |
560 |
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Dimensions (WxDxH) [mm] |
685x530x1500 |
685x580x1770 |
950x730 x1900 |
1250x850 x1905 |
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Colour |
RAL 7024 |
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IP rating |
IP20 |
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Moving the STS |
Pallet jack |
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