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
New
RS Stock No. 215-3197
Mfr. Part No.BE850G2-FR
SGD403.43
Each
units
APC Back-UPS 850VA 520W 850VA 230V 230V - - - - - 6A - - -
RS Stock No. 125-3919
Mfr. Part No.9PX3000IRTBP
BrandEaton
SGD4,708.43
Each
units
Eaton 9PX 3kW 3000VA 240V 100 → 276 (With Derating) V, 176 → 276 (Without Derating) V Rack Mount, Tower 4 min @ 2500 W - 2 (IEC C19), 8 (IEC C13) Manual Bypass IEC 16A 130mm 440mm 485mm
RS Stock No. 180-5506
Mfr. Part No.2907076
SGD788.28
Each
units
QUINT4-UPS/24DC/24DC/20/EC 720W - 18 → 32V dc 18 → 30V dc DIN Rail - EtherCat - UPS 31.4A 40mm 125mm 130mm
RS Stock No. 206-4742
Mfr. Part No.9SXEBM36R
BrandEaton
SGD1,047.51
Each
units
Eaton 9SX 900W 1000VA 230V 190 → 276V - - - - - 10A - - -
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
RS Stock No. 188-0195
Mfr. Part No.SMT750IC
BrandAPC
SGD747.81
Each
units
Smart-UPS SMT 500W 750VA 230V 160 → 286V Tower - - (2) IEC Jumpers (Battery Backup), (6) IEC 320 C13 (Battery Backup) Line Interactive - 138mm 363mm 161mm
New
RS Stock No. 215-3221
Mfr. Part No.BX950UI
SGD381.13
Each
units
APC Back-UPS 950VA 480W 950VA 230V 230V - - - - - 4A - - -
RS Stock No. 768-8843
Mfr. Part No.402012
BrandRiello
SGD1,710.03
Each
units
Sentinal Pro 2.4kW 3000VA - 220 V ac, 230 V ac, 240 V ac Stand Alone - - 9 Line Interactive, Online - 333mm 190mm 446mm
RS Stock No. 823-9414
Mfr. Part No.5PX2200iRTN
BrandEaton
SGD2,835.80
Each
units
Eaton 5PX 1.98kW 2200VA 230V 160 → 294V Rack Mount, Tower 15min - 9 Line Interactive 16A 2U 441mm 522mm
RS Stock No. 823-9379
Mfr. Part No.ELP850DIN
BrandEaton
SGD346.09
Each
units
Eaton Ellipse PRO 510W 850VA 230V 165 → 285V Rack Mount, Tower 9min - 4 Line Interactive 10A 260mm 82mm 285mm
New
RS Stock No. 215-3267
Mfr. Part No.SRVS3KI
SGD2,939.19
Each
units
Easy UPS 1Ph on-line SRVS 3000 VA 2.4kW 3000VA 230V 230V - - - - - - - - -
RS Stock No. 459-815
Mfr. Part No.IDG 600/RS
BrandRiello
SGD139.45
Each
units
IDialog 360W 600VA 230V 220 → 240V ac Stand Alone - - 4 Line Interactive, Offline - 192mm 90mm 232mm
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. 215-3192
Mfr. Part No.BE400-IT
SGD324.50
Each
units
APC Back-UPS 400 250W 400VA 230V 230V - - - - - 10A - - -
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. 823-9382
Mfr. Part No.5P1150i
BrandEaton
SGD1,195.92
Each
units
Eaton 5P 770W 1150VA 230V 160 → 294V Tower 12min - 8 Line Interactive 10A 230mm 150mm 345mm
New
RS Stock No. 215-3195
Mfr. Part No.BE650G2-IT
SGD359.59
Each
units
APC Back-UPS 650VA 400W 650VA 230V 230V - - - - - 6A - - -
New
RS Stock No. 215-3214
Mfr. Part No.BX1400UI
SGD594.63
Each
units
APC Back-UPS 1400VA 700W 1400VA 230V 230V - - - - - 6A - - -
RS Stock No. 751-2601
Mfr. Part No.2320335
SGD1,467.07
Each
units
UPS-BAT/VRLA/24DC/38AH - - - 24V dc - - - - - 50A 210mm 330mm 197mm
RS Stock No. 201-9768
Mfr. Part No.9PX1500IRTN
BrandEaton
SGD3,339.06
Each
units
Eaton 9PX 1.5kW 1500VA 230V ac 176 → 276V ac - - - - - - - - -