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3kVA UPS Prices and Specifications

3kVA UPS systems available from Server Room Environments include line interactive and on-line uninterruptible power supply systems. 3kVA UPS will be rated at 3000VA and have different output Watts rating dependent upon the power factor used by the UPS manufacturer. Please check the individual products for their kW rating. The output connections can be plug and play or hardwired dependent on the model which can be available in free standing tower or 19inch rack mount formats with options for extended battery runtimes.

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UPS Output Sockets and Mains Power Leads

3kVA UPS typically provide either a hardware back plate and terminals or a selection of output sockets including IEC and for the UK market a 3-square pin. The mains input power supply may be hardwired to the terminals from a fused spur or plug-in (16A blue Commando industrial).

3kVA Battery Backup and Runtimes

UPS runtimes are dependent upon the size of the battery set (Ah) and the load applied to the UPS (kVA or kW). If you select a 3kVA with a 5minute battery runtime and run this at half-load i.e. 1.5kVA, the UPS will provide double the amount of runtime. For longer runtimes than is available from the internal battery, battery extension packs can be connected to the uninterruptible power supply, where the UPS has a connection for these.

Typical 3kVA UPS Applications

3kVA uninterruptible power supplies are designed to power loads up to 3kVA but the kilo-Watt loading will depend on the UPS output power factor.

Output pF kVA kW
1 (Unity) 3kVA 3kW
0.9 3kVA 2.7kW
0.8 3kVA 2.4kW
0.7 3kVA 2.1kW

Typical loads for a 3kVA UPS include file servers, storage devices IT networks and VoIP telecoms systems. Industrial loads can include process control applications and sensitive electronic devices that require a conditioned mains power supply and battery backup.

3kVA UPS Sizing and Single Phase Power Supplies

The standard UK single phase mains power supply voltage in the UK is 230Vac 50Hz. 3kVA = 3000VA which on a 230Vac supply means that a 3kVA UPS will be able to supply 13.04Amps in total (230Vx13.04Amps=3000VA). If you are sizing your UPS load in Watts or kW (3000Watts), the UPS should be suitably rated. A 3kVA UPS may be rated at unity power factor (1PF) which means that the UPS can supply 3kVA/3kW of load. If the power factor is less (typically 0.9 or 0.8) then the Watt load should not exceed 2700W (2.7kW) or 2400W (2.4kW) etc.

3kVA UPS Installation Checklist

This is not an exhaustive list but provides some general check points when preparing to install a 3kVA uninterruptible power supply.

  • Calculate the actual load to be connected to the UPS. Formula Volts x Amps = VA or kVA.
  • How many output sockets are required and their type? 10A C13 or 16 C19 or hardwired.
  • Estimate the amount of battery back up time required. 5-10 minutes should be sufficient for an orderly systems shutdown and longer may require additional battery extension packs if the critical loads are to run for longer. For an IP connection a UPS SNMP card will be required.
  • Rack mount or Tower format. If a rack UPS is required calculate the U-height that the UPS will take up in a server cabinet (including additional battery extension packs) and note the maximum depth of the UPS system as you will require a server cabinet that can accommodate this.
  • UPS preventative maintenance planning. Will you need a UPS maintenance bypass to allow the UPS to be isolated without disruption to the connected critical loads.
  • UPS warranty and maintenance contracts. Warranties vary from 24months to 36 and longer. A UPS maintenance contract will provide emergency cover with a callout within a set working hours time or next day or a clock hour basis, and the contract should include an annual preventative maintenance plan.

Server Room Environments provides a complete project managed service including UPS site surveys, turn-key systems including PDUs (power distribution), UPS maintenance bypasses, network interfaces for remote monitoring, standby power generators for extended backup times, UPS installation and maintenance contracts.

Please contact our projects team for further information or see our 3000VA rated UPS systems.


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