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. 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
New
RS Stock No. 215-3212
Mfr. Part No.BX1400U-GR
SGD618.48
Each
units
APC BACK-UPS 1400VA 700W 1400VA 230V 230V - - - - - 6A - - -
RS Stock No. 459-825
Mfr. Part No.IDG 400/RS
BrandRiello
SGD132.62
Each
units
IDialog 240W 400VA 230V 220 → 240V ac Stand Alone - - 4 Line Interactive, Offline - 192mm 90mm 232mm
RS Stock No. 201-9760
Mfr. Part No.5SC1000IR
BrandEaton
SGD1,135.92
Each
units
Eaton 5SC 700W 1000VA 230V ac 184 → 276V ac - - - - - - - - -
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. 201-9778
Mfr. Part No.5SC1500IR
BrandEaton
SGD1,442.64
Each
units
Eaton 5SC 1.05kW 1500VA 230V ac 184 → 276V ac - - - - - - - - -
RS Stock No. 180-5496
Mfr. Part No.2906996
SGD669.10
Each
units
QUINT4 240W - 18 → 32V dc 18 → 30V dc DIN Rail - EtherCat - UPS 8.3A 35mm 125mm 130mm
RS Stock No. 201-0846
Mfr. Part No.SMC1500I-2UC
BrandAPC
SGD1,403.40
Each
units
Smart-UPS 900W 1500VA 230V 230V - - - - - 6.5A - - -
New
RS Stock No. 215-3219
Mfr. Part No.BX950U-FR
SGD381.51
Each
units
APC BACK-UPS 950VA 480W 950VA 230V 230V - - - - - 4A - - -
New
RS Stock No. 215-3211
Mfr. Part No.BX1400U-FR
SGD548.16
Each
units
APC BACK-UPS 1400VA 700W 1400VA 230V 230V - - - - - 6A - - -
RS Stock No. 201-9772
Mfr. Part No.9PX1000IRT2U
BrandEaton
SGD2,065.61
Each
units
Eaton 9PX 1kW 1000VA 230V ac 176 → 276V ac - - - - - - - - -
RS Stock No. 201-9773
Mfr. Part No.5SC750i
BrandEaton
SGD499.20
Each
units
Eaton 5SC 525W 750VA 230V ac 184 → 276V ac - - - - - - - - -
RS Stock No. 768-8767
Mfr. Part No.IDG 1200
BrandRiello
SGD313.36
Each
units
IDialog Plus 720W 1200VA 230V 220 → 240V ac Stand Alone - - 6 Offline - 275mm 97mm 315mm
RS Stock No. 689-9073
Mfr. Part No.BK650EI
BrandAPC
SGD337.49
Each
units
Back-UPS CS 400W 650VA 230V 180 → 266V Stand Alone - - 6 Offline 7A 165mm 91mm 284mm
RS Stock No. 146-8166
Mfr. Part No.AR8105BLK
BrandAPC
SGD184.10
Each
units
NetShelter - - - - Screw Mount - - - - - 483mm 406mm 89mm
RS Stock No. 823-9417
Mfr. Part No.5PXEBM72RT3U
BrandEaton
SGD1,220.62
Each
units
Eaton 5PX - 3000VA - - Rack Mount 285min - - Extended Battery Module - 3U 441mm 497mm
New
RS Stock No. 215-3252
Mfr. Part No.SRT3000RMXLI-NC
SGD10,172.12
Each
units
APC Smart-UPS SRT 3000VA 2.7kW 3000VA 230V 230V - - - - - - - - -
RS Stock No. 869-5019
Mfr. Part No.VSD 2200
BrandRiello
SGD1,554.56
Each
units
Vision Dual 1.98kW 2200VA 220 → 240V ac 220 → 240V ac Rack Mount - - 8 Line Interactive - 625mm 87mm 450mm
RS Stock No. 768-8830
Mfr. Part No.SEP 2200
BrandRiello
SGD2,039.70
Each
units
Sentinal Pro 1.76kW 2200VA - 220 V ac, 230 V ac, 240 V ac Stand Alone - - 8 Line Interactive, Online - 333mm 190mm 446mm
RS Stock No. 125-3909
Mfr. Part No.9PX2200IRT3U
BrandEaton
SGD2,821.89
Each
units
Eaton 9PX 2.2kW 2200VA 240V 100 → 276 (With Derating) V, 176 → 276 (Without Derating) V Rack Mount, Tower 5 min @ 1800 W - 2 (IEC C19), 8 (IEC C13) Online 16A 130mm 440mm 485mm