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 Network Compatibility Number of Outlets Type Current Rating Length Width Depth
RS Stock No. 823-9366
Mfr. Part No.ELP1600FR
BrandEaton
SGD865.95
Each
units
Eaton Ellipse PRO 1kW 1600VA 230V 165 → 285V Rack Mount, Tower 9min - 8 Line Interactive 10A 275mm 82mm 390mm
RS Stock No. 823-9372
Mfr. Part No.ELP1200DIN
BrandEaton
SGD628.11
Each
units
Eaton Ellipse PRO 750W 1200VA 230V 165 → 285V Rack Mount, Tower 9min - 8 Line Interactive 10A 275mm 82mm 390mm
RS Stock No. 823-9391
Mfr. Part No.5P1550i
BrandEaton
SGD1,413.97
Each
units
Eaton 5P 1.1kW 1550VA 230V 160 → 294V Tower 13min - 8 Line Interactive 10A 230mm 150mm 445mm
RS Stock No. 823-9376
Mfr. Part No.ELP1600DIN
BrandEaton
SGD822.14
Each
units
Eaton Ellipse PRO 1kW 1600VA 230V 165 → 285V Rack Mount, Tower 9min - 8 Line Interactive 10A 275mm 82mm 390mm
RS Stock No. 624-7457
Mfr. Part No.6EP1931-2FC42
BrandSiemens
SGD706.18
Each
units
SITOP DC 960W - 24V dc 22 → 29V dc DIN Rail - - - - 42.6A 125mm 102mm 125mm
New
RS Stock No. 207-6151
Mfr. Part No.SX3500CI
SGD222.07
Each
units
SX3500CI 300W 500VA 230V 230V - - - - - 2A - - -
RS Stock No. 201-0842
Mfr. Part No.SRT5KXLI
BrandAPC
SGD6,819.48
Each
units
Smart-UPS 4.5kW 5000VA 230V 230V - - - - - 24A - - -
RS Stock No. 188-0185
Mfr. Part No.SMT1500IC
BrandAPC
SGD1,422.46
Each
units
Smart-UPS SMT 1kW 1500VA 230V 160 → 286V Tower - - 1 Line Interactive - 171mm 439mm 219mm
RS Stock No. 823-9394
Mfr. Part No.5P650iR
BrandEaton
SGD767.78
Each
units
Eaton 5P 420W 650VA 230V 160 → 294V Rack Mount 9min - 8 Line Interactive 10A 1U 438mm 364mm
RS Stock No. 624-7479
Mfr. Part No.6EP1931-2EC42
BrandSiemens
SGD569.21
Each
units
SITOP DC - - 21.5 → 28.5V dc 22 → 29V dc DIN Rail - - - - 15A 125mm 50mm 125mm
RS Stock No. 753-1968
Mfr. Part No.UB10.242
BrandPULS
SGD428.61
Each
units
DIMENSION - - 22.25V 22.5 → 30V dc DIN Rail - - - - 10A 124mm 49mm 117mm
RS Stock No. 188-0181
Mfr. Part No.SMT1000IC
BrandAPC
SGD1,071.89
Each
units
Smart-UPS SMT 700W 1000VA 230V 160 → 286V Tower - - 1 Line Interactive - 171mm 439mm 219mm
RS Stock No. 188-0186
Mfr. Part No.SMT1500RMI2UC
BrandAPC
SGD1,877.23
Each
units
Smart-UPS SMT 1kW 1500VA 230V 160 → 286V Rack Mount - - 4 Line Interactive - 432mm 477mm 86mm
RS Stock No. 869-5013
Mfr. Part No.VSD 3000
BrandRiello
SGD1,727.94
Each
units
Vision Dual 2.7kW 3000VA 220 → 240V ac 220 → 240V ac Rack Mount - - 9 Line Interactive - 625mm 87mm 450mm
RS Stock No. 206-4743
Mfr. Part No.9SXEBM36T
BrandEaton
SGD774.00
Each
units
Eaton 9SX 900W 1000VA 230V 190 → 276V - - - - - 10A - - -
RS Stock No. 768-8745
Mfr. Part No.IPG 800 UK
BrandRiello
SGD225.24
Each
units
IPlug 480W 800VA 230V 220 → 240V ac Stand Alone - - 8 Offline - 99mm 175mm 213mm
RS Stock No. 180-5497
Mfr. Part No.2907066
SGD532.03
Each
units
QUINT4 480W - 18 → 32V dc 18 → 30V dc DIN Rail - - - UPS 16.2A 35mm 125mm 130mm
RS Stock No. 745-1916
Mfr. Part No.5PX3000iRT3U
BrandEaton
SGD3,310.27
Each
units
Eaton 5PX 2.7kW 3000VA 230V 150 → 294V Rack Mount, Stand Alone 9min - 9 Line Interactive - 130.7mm 441mm 497mm
New
RS Stock No. 215-3217
Mfr. Part No.BX700U-GR
SGD323.62
Each
units
APC Back-UPS 700VA 390W 700VA 230V 230V - - - - - 7A - - -
New
RS Stock No. 215-3259
Mfr. Part No.SRTL1000RMXLI
SGD6,333.33
Each
units
APC Smart-UPS SRT Li-Ion 1000VA 900W 1000VA 230V 230V - - - - - - - - -