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. 215-3193
Mfr. Part No.BE650G2-FR
SGD359.59
Each
units
APC Back-UPS 650VA 400W 650VA 230V 230V - - - - - 6A - - -
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. 215-3234
Mfr. Part No.SMX2200HVNC
SGD6,451.79
Each
units
APC Smart-UPS X 2200VA 1.98kW 2200VA 208 V, 230 VV 208 V, 230 V - - - - - - - - -
RS Stock No. 125-3918
Mfr. Part No.9PX3000IRTBPH
BrandEaton
SGD3,628.30
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) Online 16A 130mm 440mm 485mm
New
RS Stock No. 215-3244
Mfr. Part No.SRT1000XLI
SGD2,982.11
Each
units
APC Smart-UPS SRT 1000VA 1kW 1000VA 230V 230V - - - - - - - - -
RS Stock No. 180-5502
Mfr. Part No.2907071
SGD513.87
Each
units
QUINT4-UPS/24DC/24DC/20 720W - 18 → 32V dc 18 → 30V dc DIN Rail - - - UPS 31.4A 40mm 125mm 130mm
RS Stock No. 125-3921
Mfr. Part No.9PXEBM72RT2U
BrandEaton
SGD1,918.23
Each
units
Eaton 9PX 2.2 kW, 3 kW 2200 VA, 3000 VA 72V - Rack Mount, Tower - - - Online - 86.5mm 440mm 605mm
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
RS Stock No. 180-5507
Mfr. Part No.2907077
SGD985.03
Each
units
QUINT4 1.44kW - 24V dc 18 → 30V dc DIN Rail - - - UPS 51.2A 47mm 125mm 130mm
RS Stock No. 201-9778
Mfr. Part No.5SC1500IR
BrandEaton
SGD1,460.72
Each
units
Eaton 5SC 1.05kW 1500VA 230V ac 184 → 276V ac - - - - - - - - -
RS Stock No. 355-6411
Mfr. Part No.SDH 1000/RS
BrandRiello
SGD1,271.30
Each
units
Dialog Plus-R 700W 1000VA 230V 230V ac Rack Mount - - 8 iEC 320 C13 Online - 2U 19in 390mm
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
RS Stock No. 188-0193
Mfr. Part No.SMT3000RMI2UC
BrandAPC
SGD3,939.54
Each
units
Smart-UPS SMT 2.7kW 3000VA 230V 160 → 286V Rack Mount - - 1 Line Interactive - 480mm 683mm 86.1mm
RS Stock No. 768-8837
Mfr. Part No.SEP 1500
BrandRiello
SGD1,150.23
Each
units
Sentinal Pro 1.2kW 1500VA - 220 V ac, 230 V ac, 240 V ac Stand Alone - - 4 Line Interactive, Online - 235mm 158mm 422mm
New
RS Stock No. 215-3249
Mfr. Part No.SRT2200RMXLI
SGD5,660.34
Each
units
APC Smart-UPS SRT 2200VA 1.98kW 2200VA 230V 230V - - - - - - - - -
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
SGD2,857.25
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. 201-0845
Mfr. Part No.SMC1000I-2UC
BrandAPC
SGD1,199.40
Each
units
Smart-UPS 600W 1000VA 230V 230V - - - - - 4.3A - - -
RS Stock No. 201-9764
Mfr. Part No.9SX1500IR
BrandEaton
SGD2,406.27
Each
units
Eaton 9SX 1.35kW 1500VA 230V ac 190 → 276V ac - - - - - - - - -
RS Stock No. 823-9354
Mfr. Part No.ELP850FR
BrandEaton
SGD503.48
Each
units
Eaton Ellipse PRO 510W 850VA 230V 165 → 285V Rack Mount, Tower 9min - 4 Line Interactive 10A 260mm 82mm 285mm