Proline. UPS 220V / 230V uninterrupted power supplies. Computer hardware South Africa

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LinkQnet Mecer Microworld Netogy Powercom Selected BrandProline PSS
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Note: UPS are temporary "switch-over" solutions that provide power for 5 to 15 minutes (100% load). UPS beep during a power failure.
An inverter is required to power devices for an extended period of time. Note that continuous power cuts will shorten battery life. The warranty covers charge cycles, not a period of time. Stage 4 load-shedding may shorten battery life to 6 months or less if batteries discharge below recommended charge levels (Lead Acid 50% DOD, LiFePO4 80% DOD).

Proline UPS 220V / 230V uninterrupted power supplies

Proline. UPS 220V / 230V uninterrupted power supplies. Computer hardware South Africa

Prices displayed on our site are a reference and are subject to change without notice, quotation prices are final, subject to stock availability. All transactions are subject to our terms of sale. E&OE.
 
There are 4 products in UPS 220V / 230V uninterrupted power supplies
Displaying products 1 - 4 of 4 products
Proline

UPSA650

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UPSA650, Black, Proline 650VA (360Watt) Line Interactive UPS

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R 751.00
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Proline

UPSA850

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UPSA850, Black, Proline 850VA Line Interactive 480Watt UPS

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Proline

UPSA1200

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UPSA1200, Black, Proline 1200VA Line Interactive UPS - 600Watt

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Proline

UPSI2000RT

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UPSI2000RT, Proline 2000VA Online UPS with AVR - Serial Cable included 1400Watt

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More information about Proline UPS 220V / 230V uninterrupted power supplies


This category consists of 1 page.

The following brands are currently available for "ups 220v / 230v uninterrupted power supplies". You can select to display only a specific brand for the category "ups 220v / 230v uninterrupted power supplies" by selecting the brand's icon at the top of this page.
  • AccoNet
  • APC (American Power Convertion)
  • Eaton
  • FSP
  • KStar
  • Lalela
  • LinkQnet
  • Mecer
  • Microworld
  • Netogy
  • Powercom
  • Proline
  • PSS
  • RCT
  • Schneider
  • Tbyte
  • Vertiv

An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails.

*Note: A UPS will beep continuously when power is off. This is normal.

The UPS is only a temporary power backup (5 to 15 minutes) and it is not intended for continuous use.  You will need to switch over to a generator or power your PC down.

An inverter is meant for continuous power and will not beep continuously.

Offline UPS

Offline UPS connects the computer to the ESKOM's power grid (or to a generator) until the voltage falls below a certain level, in which case, the UPS switches over to battery backup. The switch-over time can be as long as 25 milliseconds depending on the amount of time it takes the standby UPS to detect the lost utility voltage. The UPS will be designed to power certain equipment, such as a personal computer, without any objectionable dip or brownout to that device.

Online UPS

Online UPS connects the computer directly to the battery backup at all times. This type of UPS is able to tolerate continuous under-voltage brownouts and over-voltage surges without consuming the limited reserve battery power. It instead compensates by automatically selecting different power taps on the auto-transformer.

Double conversion UPS

The primary power path is the inverter / battery and it is not the AC mains. This means that the output power is supplied by the battery all the time and no switch-over happens if power fails (0ms switch over)

If the battery / inverter fails, the AC is used as the backup power.

The advantage is that there is no switch over if AC fails, but the disadvantages are additional heat, lower efficiency and reduced life-span of the components in the UPS.

Other UPS features may include:

  • AVR - Automatic Voltage Regulator
  • Monitoring ports and software
  • Built-in Surge Protection
  • Audible alarms for power outage and low battery

What is the difference between VA and Watts

UPS are rated in VA (Volt-Amps).

This is a basic rating for UPS and is the Voltage multiplied by the Amperage the UPS handles.

At 220Volts, a UPS that can supply 1Amp would be rated 220VA.

This however is not the real power for AC devices because AC power rating requires the power factor to be taken into account.

The industry standard rule-of-thumb: plan for a power factor of 60% (this is an average conservative power factor).  The power that AC products can draw from the UPS is therefore approximately 60% of the VA rating.

A 1000VA UPS would therefore have an AC power rating of approximately 600Watts.

What is power factor?

In AC circuits, the power factor is the ratio of the real power that is used to do work and the apparent power that is supplied to the circuit.

The power factor can get values in the range from 0 to 1.

When all the power is reactive power with no real power (usually inductive load) - the power factor is 0.

When all the power is real power with no reactive power (resistive load) - the power factor is 1.

Typical power factors
Resistive load = 1
Fluorescent lamp = 0.95
Incandescent lamp = 1
Induction motor full load  = 0.85
Induction motor no load  =  0.35
Resistive oven  = 1
Synchronous motor = 0.9


UPS keeps switching on and off while using a generator


UPS are sensitive to the voltage and frequency on its input - this is the way it detects whether it should switch to battery backup mode or not. This is normal operation for a UPS.

Some generators, especially the cheaper "home use" generators, are not always calibrated accurately when it comes to frequency (50Hz in South Africa), while the voltage seems to be in range. If the frequency is border-line, the UPS tends to switch over to battery mode whenever it falls out of range, and then switches off when it is in range again.

The best way to correct this on/off behaviour is to set the throttle on the generator to a point where the UPS becomes stable.

Note: A Voltage regulator / AVR will not correct the frequency and will do little to fix this behaviour. An AVR is all about Voltage, and the AVR will fix voltage fluctuations from a generator, protecting sensitive equipment from Voltage dips and spikes.



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