UPS Uninterruptible Power Supplies

An uninterruptible power supply, commonly known as "UPS Power Supply" is a device that is designed to supply power to your computers, servers and data centres in case of main power failure, electrical surge or unexpected power cut off. These devices contain a battery that guarantees power to your computer system for a certain period of time, creating a time period long enough for saving the current task and shutting off the computer. For further reading, see our complete guide to uninterruptible power supplies (UPS).




UPS Uninterruptible Power Supply Types?


There are several types of UPS systems available on the market:


  • Online UPS - A system of supplying power by converting AC input (utility power) to DC and reconverting it to stable AC by the inverter while constantly charging the batteries. Supplies power without momentary power breaks in the event of a power outage.

  • Standby UPS - A system where, normally AC input (utility power) is output as is to connected devices and when a power outage or abnormal voltage is detected, inverter starts feeding using power from the batteries. In the event of a power outage, a few milliseconds of momentary break occurs in AC output.

  • Parallel processing UPS - While power from AC input (utility power) is supplied, the bidirectional inverter connected in parallel corrects voltage and absorbs noise. Because this is the online inverter (parallel) system, it has both high efficiency and high reliability.

  • Hybrid UPS - This system consists of three modes: double conversion mode, economy mode, and active filter mode. The UPS automatically selects the power feeding mode to best suit the power situation and load conditions. It is possible to shift between the respective modes with no momentary break in output voltage. Double conversion mode is selected when the power situation is poor and economy mode is selected when the power situation is good.


How to choose the right UPS device


A UPS power supply may vary in the backup time, size, numbers and type of communication ports. Some more expensive models are equipped with an intelligent system that automatically shut down connected devices to ensure that no data is lost and the device shutdown is safe. All of these aspects need to be considered before making the final decision on buying one model or another.


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Description Price Model Power Rating VA Rating Output Voltage Input Voltage Mounting Type Backup Time Number of Outlets Type Current Rating Length Width Depth
RS Stock No. 499-9601
Mfr. Part No.6EP1931-2FC21
BrandSiemens
PHP23,042.78
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SITOP DC - - 21.5 → 28.5V dc 22 → 29V dc DIN Rail - - - 40A 125mm 102mm 125mm
RS Stock No. 473-1045
Mfr. Part No.6EP1931-2DC21
BrandSiemens
PHP11,728.94
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SITOP DC - - 21.5 → 28.5V dc 22 → 29V dc DIN Rail - - - 6A 125mm 50mm 125mm
RS Stock No. 624-7457
Mfr. Part No.6EP1931-2FC42
BrandSiemens
PHP29,346.29
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SITOP DC 960W - 24V dc 22 → 29V dc DIN Rail - - - 42.6A 125mm 102mm 125mm
RS Stock No. 668-0532
Mfr. Part No.6EP1933-2EC51
BrandSiemens
PHP26,026.88
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SITOP UPS500S 360W - 24V dc 22 → 29V dc DIN Rail - 1 Switch Mode 15.2A 125mm 120mm 125mm
RS Stock No. 624-7479
Mfr. Part No.6EP1931-2EC42
BrandSiemens
PHP17,771.76
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SITOP DC - - 21.5 → 28.5V dc 22 → 29V dc DIN Rail - - - 15A 125mm 50mm 125mm
RS Stock No. 741-8726
Mfr. Part No.6EP1933-2EC41
BrandSiemens
PHP22,311.76
Each
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SITOP UPS500S 360W - 24V dc 24V dc DIN Rail - 1 Switch Mode 17.5A 120mm 125mm 120mm
RS Stock No. 668-0545
Mfr. Part No.6EP1933-2NC01
BrandSiemens
PHP41,167.57
Each
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SITOP UPS500P 168W - 23.3 → 24.7V dc 22.5 → 29V dc DIN Rail - 1 Switch Mode 7A 80mm 400mm 80mm
RS Stock No. 473-1017
Mfr. Part No.6EP1931-2EC21
BrandSiemens
PHP14,606.70
Each
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SITOP DC - - 21.5 → 28.5V dc 22 → 29V dc DIN Rail - - - 15A 125mm 50mm 125mm
RS Stock No. 473-1001
Mfr. Part No.6EP1931-2EC31
BrandSiemens
PHP15,563.24
Each
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SITOP DC - - 21.5 → 28.5V dc 22 → 29V dc DIN Rail - - - 15A 125mm 50mm 125mm
RS Stock No. 473-1039
Mfr. Part No.6EP1931-2DC31
BrandSiemens
PHP14,208.00
Each
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SITOP DC - - 21.5 → 28.5V dc 22 → 29V dc DIN Rail - - - 6A 125mm 50mm 125mm