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. 823-9348
Mfr. Part No.ELP1200IEC
BrandEaton
SGD602.51
Each
units
Eaton Ellipse PRO 750W 1200VA 230V 165 → 285V Rack Mount, Tower 9min - 8 Line Interactive 10A 275mm 82mm 390mm
RS Stock No. 168-2510
Mfr. Part No.2868693
SGD591.73
Each
units
- - - 15V dc 16.5V dc DIN Rail - - - UPS - - 108mm 61mm
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. 869-5016
Mfr. Part No.VSD 1500
BrandRiello
SGD1,281.02
Each
units
Vision Dual 1.35kW 1500VA 220 → 240V ac 220 → 240V ac Rack Mount - - 8 Line Interactive - 425mm 87mm 450mm
RS Stock No. 745-1880
Mfr. Part No.EL1200USBIEC
BrandEaton
SGD536.74
Each
units
Eaton Ellipse ECO 750W 1200VA 230V 161 → 284V Rack Mount, Stand Alone - - 8 Offline - 305mm 81mm 312mm
RS Stock No. 768-8887
Mfr. Part No.SDH 3000
BrandRiello
SGD2,239.96
Each
units
Sentinel Dual 2.7kW 3000VA - 220 V ac, 230 V ac, 240 V ac Stand Alone - - 9 Line Interactive, Online - 87mm 450mm 625mm
New
RS Stock No. 215-3199
Mfr. Part No.BE850G2-IT
SGD403.43
Each
units
APC Back-UPS 850VA 520W 850VA 230V 230V - - - - - 6A - - -
RS Stock No. 206-4744
Mfr. Part No.9SXEBM48R
BrandEaton
SGD1,124.48
Each
units
Eaton 9SX 1.35kW 1500VA 230V 190 → 276V - - - - - 10A - - -
RS Stock No. 168-2507
Mfr. Part No.2905908
SGD2,039.16
Each
units
TRIO-UPS-2G/1AC/1AC/120V/750VA 600W 750VA 120V ac 120V ac DIN Rail 1 (600 W) min, 4 (300 W) min, 20 (100 W) min - 2 - 6A 170mm 210mm 136mm
RS Stock No. 201-9766
Mfr. Part No.9SX1000IR
BrandEaton
SGD1,734.32
Each
units
Eaton 9SX 900W 1000VA 230V ac 190 → 276V ac - - - - - - - - -
RS Stock No. 180-5511
Mfr. Part No.2907081
SGD1,242.72
Each
units
QUINT4 1.44kW - 18 → 32V dc 18 → 30V dc DIN Rail - EtherCat - UPS 51.2A 47mm 125mm 130mm
New
RS Stock No. 215-3221
Mfr. Part No.BX950UI
SGD381.13
Each
units
APC Back-UPS 950VA 480W 950VA 230V 230V - - - - - 4A - - -
New
RS Stock No. 215-3204
Mfr. Part No.BR1600MI
SGD1,390.62
Each
units
Back UPS Pro BR 1600VA 960W 1600VA 230V 230V - - - - - 10A - - -
RS Stock No. 823-9357
Mfr. Part No.ELP1600IEC
BrandEaton
SGD876.80
Each
units
Eaton Ellipse PRO 1kW 1600VA 230V 165 → 285V Rack Mount, Tower 9min - 8 Line Interactive 10A 275mm 82mm 390mm
New
RS Stock No. 215-3266
Mfr. Part No.SRVS2KI
SGD2,247.31
Each
units
Easy UPS 1Ph on-line SRVS 2000 VA 1.6kW 2000VA 230V 230V - - - - - - - - -
RS Stock No. 869-5013
Mfr. Part No.VSD 3000
BrandRiello
SGD1,749.59
Each
units
Vision Dual 2.7kW 3000VA 220 → 240V ac 220 → 240V ac Rack Mount - - 9 Line Interactive - 625mm 87mm 450mm