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Do you need help installing?
We can help you.

We provide a range of on-site services whether your project is for a single UPS and Generator or remote monitoring across multiple sites.

Get a head start with our FREE
Project Management Consultation.

Why not use our project management services to help you have a smooth and pain free project.

Trade-In your UPS with us

Trade-in your old UPS for a same or higher spec model*

Do you need help installing?
We can help you.

We provide a range of on-site services whether your project is for a single UPS and Generator or remote monitoring across multiple sites.

Get a head start with our FREE
Project Management Consultation.

Why not use our project management services to help you have a smooth and pain free project.

Trade-In your UPS with us

Trade-in your old UPS for a same or higher spec model*

*Terms and conditions apply.

Single Phase UPS Systems

The technology used to generate and distribute electricity in many countries around the world produces either a three phase or single phase supply.

As it moves closer to the point of use, local substations reduce the electricity voltage and add a neutral and earth reference. The substation supplies a single phase, 230V supply (made up of a single phase and neutral) to energy consumers (businesses or consumer customers) in its vicinity, or a three phase supply to larger energy consumers.

The supply coming into an industrial estate, factory, office block or other large building will be a three phase, 400V 50Hz supply. It is then converted to a single phase supply by the distribution network within the building so that wall sockets will have a voltage of 230V at 50Hz. This provides a maximum current typically: 10, 13, 16, or 20 Amps.

UPS are designed to work on either a single or three phase supply, but not both. The difference between them is really to do with how they handle the electricity supply, their switching mechanisms and size of output they are designed to enable.

At Critical Power Projects, we supply a number of desktop, floor standing or rack mounted, single phase UPS and single phase UPS systems up to 3kVA from leading manufacturers across the globe. We employ a team of qualified and experienced UPS experts, fully conversant with the full gamut of requirements of power protection by all sectors of business and industry. We also understand which single phase UPS will be best for your requirements, and as we are manufacturer independent, we are free to supply a solution that best meet your needs. If it’s just the product you want, we can ship it to you quickly (from stock or on special order). For additional power security, some single phase UPS (and those rated above 3kVA) can be hard wired, in which case we can provide expert installation and project management.

We also provide battery extension packs to increase battery run time, plus bypasses, remote monitoring, power management and power monitoring solutions.

For advice on UPS, or if you would like to know more about single phase UPS and the range of power protection products and services we supply, or if you would like us to arrange a site survey, or quotation, please call: 0800 978 8988, fill in our contacts form, or send us an email with your details and we’ll call you.

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Critical Power Supplies - APC BE5500UK UPS from Critical Power Sup
APC back UPS 550
£88.01 £88.01
in stock
details >
Riello idialog 600va UPS 7 minutes runtime
£56.08 £56.08
in stock
details >
Critical Power Supplies - APC Back-UPS ES 700VA SoHo UPS from Crit
APC back UPS 700
£95.88 £95.88
in stock
details >
Riello idialog 400va UPS 9minutes runtime
£55.57 £55.57
in stock
details >
Critical Power Supplies - APC back-ups line-interactive 1400va
APC back-ups uninterruptible power supply (ups) 1400 va 6 ac outlet(s) line-interactive
£118.90 £118.90
in stock
details >
APC Smart-UPS 3000va rackmount 2u with lcd
£1,388.62 £1,388.62
in stock
details >
Critical Power Supplies - APC BE325-UK  from Critical Power Suppli
APC back-ups 325, 230v, bs1363
£81.11 £81.11
in stock
details >
Riello Vision 800va UPS with 9minutes runtime
£172.52 £172.52
in stock
details >
APC power-saving back-ups pro 1500, 230v
£305.81 £305.81
in stock
details >
Salicru sps.900.one uk UPS 500-2000 va with avr + soft / usb
£62.18 £62.18
in stock
details >
Salicru sps.400.soho+ uk uninterruptible power supply (ups)
£65.96 £65.96
in stock
details >
Riello idialog 1200va UPS 6minutes runtime
£91.01 £91.01
in stock
details >
Critical Power Supplies - APC BR550GI UPS Front  from Critical Pow
APC power-saving back-ups pro 550, 230v
£129.38 £129.38
in stock
details >
Critical Power Supplies - Riello Dialog Vision UPS Switch Desktop
Riello Vision 1500va UPS with 9 minutes runtime
£247.44 £247.44
in stock
details >
Critical Power Supplies - BX500CI UPS Front from Critical Power Su
APC back-ups 500va,avr, iec outlets
£56.20 £56.20
in stock
details >
Salicru sps.600 soho+
£69.86 £69.86
in stock
details >
Salicru sps.1400.soho+ uk uninterruptible power supply (ups)
£133.15 £133.15
in stock
details >
Critical Power Supplies - Riello Net Power 600-2000VA UPS 2013 fro
Riello Net power 800va UPS 7minutes runtime
£62.66 £62.66
in stock
details >

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