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 Number of Outlets Type Current Rating Length Width Depth
RS Stock No. 665-7918
Mfr. Part No.2866239
SGD1,109.68
Each
units
QUINT-DC-UPS/24DC/20 - - 24V dc 24V dc DIN Rail - - UPS 22A 130mm 66mm 125mm
RS Stock No. 665-7857
Mfr. Part No.2866611
SGD323.42
Each
units
TRIO-UPS/1AC/24DC/ 5 - - 24V dc 100 → 350 V dc, 85 → 264 V ac DIN Rail - - Buffer Module 5A 130mm 60mm 118mm
RS Stock No. 739-7869
Mfr. Part No.2320238
SGD334.29
Each
units
QUINT-UPS/24DC/24DC/20 - - 24V dc 24V dc DIN Rail - - - - 130mm 40mm 125mm
RS Stock No. 768-8846
Mfr. Part No.SEP 3000ER
BrandRiello
SGD1,848.45
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. 665-7914
Mfr. Part No.2866242
SGD2,255.52
Each
units
QUINT-DC-UPS/24DC/40 - - 24V dc 22.5 → 30V dc DIN Rail - - DC 42.5A 130mm 66mm 125mm
RS Stock No. 473-1045
Mfr. Part No.6EP1931-2DC21
BrandSiemens
SGD308.43
Each
units
SITOP DC - - 21.5 → 28.5V dc 22 → 29V dc DIN Rail - - - 6A 125mm 50mm 125mm
RS Stock No. 768-8880
Mfr. Part No.SDH 3000 ER
BrandRiello
SGD1,482.90
Each
units
Sentinel Dual 2.4kW 3000VA - 220 V ac, 230 V ac, 240 V ac Stand Alone - 9 Line Interactive, Online - 87mm 450mm 625mm
RS Stock No. 665-7851
Mfr. Part No.2866598
SGD274.74
Each
units
MINI-DC-UPS/12DC/4 - - 12V dc 100 → 240V ac DIN Rail - - Buffer Module 4A 202mm 135mm 110mm
RS Stock No. 665-7854
Mfr. Part No.2866640
SGD250.34
Each
units
MINI-DC-UPS/24DC/2 - - 24V dc 100 → 350 V dc, 85 → 264 V ac DIN Rail - - Buffer Module 2A 99mm 67.5mm 107mm
RS Stock No. 739-7865
Mfr. Part No.2320225
SGD298.72
Each
units
QUINT-UPS/ 24DC/ 24DC/10 - - 24V dc 24V dc DIN Rail - - - - 130mm 35mm 125mm
RS Stock No. 627-6225
Mfr. Part No.UB10.241
BrandPULS
SGD382.18
Each
units
DIMENSION 240W - 22.4V dc 22.5 → 30V dc DIN Rail - - DC 10A 124mm 49mm 117mm
RS Stock No. 499-9601
Mfr. Part No.6EP1931-2FC21
BrandSiemens
SGD558.56
Each
units
SITOP DC - - 21.5 → 28.5V dc 22 → 29V dc DIN Rail - - - 40A 125mm 102mm 125mm
RS Stock No. 753-1977
Mfr. Part No.UB10.245
BrandPULS
SGD517.51
Each
units
DIMENSION 360W - 12 → 22V dc 22.5 → 30V dc DIN Rail - 2 - 10A 124mm 49mm 117mm
RS Stock No. 739-7878
Mfr. Part No.2320241
SGD1,388.14
Each
units
QUINT-UPS/ 24DC/ 24DC/40 - - 24V dc 24V dc DIN Rail - - - - 130mm 47mm 125mm
RS Stock No. 768-8834
Mfr. Part No.SEP 2200ER
BrandRiello
SGD1,499.50
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. 741-8726
Mfr. Part No.6EP1933-2EC41
BrandSiemens
SGD540.84
Each
units
SITOP UPS500S 360W - 24V dc 24V dc DIN Rail - 1 Switch Mode 17.5A 120mm 125mm 120mm
RS Stock No. 505-5421
Mfr. Part No.2866213
SGD740.10
Each
units
QUINT-BUFFER/24DC/20 - - 24V dc 24V dc DIN Rail - - DC 20.6A 130mm 64mm 125mm
RS Stock No. 768-8878
Mfr. Part No.SDH 2200 ER
BrandRiello
SGD1,466.64
Each
units
Sentinel Dual 1.76kW 2200VA - 220 V ac, 230 V ac, 240 V ac Stand Alone - 9 Line Interactive, Online - 87mm 450mm 625mm
RS Stock No. 473-1001
Mfr. Part No.6EP1931-2EC31
BrandSiemens
SGD384.80
Each
units
SITOP DC - - 21.5 → 28.5V dc 22 → 29V dc DIN Rail - - - 15A 125mm 50mm 125mm
RS Stock No. 667-5394
Mfr. Part No.PVUA 24/24-10
BrandBlock
SGD288.35
Each
units
PV 480W - 24V dc 22 → 29V dc DIN Rail - - - 10.8A 127mm 40mm 163mm