Line-interactive UPS systems use automatic voltage regulation (AVR) to correct abnormal voltages without switching to battery. (Regulating voltage by switching to battery drains your backup power and can cause batteries to wear out prematurely.) The UPS detects when voltage crosses a preset low or high threshold value and uses transformers to boost or lower the voltage by a set amount to return it to the acceptable range.
Double Conversion On-line UPS systems use a more precise method of voltage regulation: they continuously convert incoming AC power to DC power and then convert the DC power to ideal AC output power. This continuous double-conversion operation isolates connected equipment from problems on the AC line, including blackouts, brownouts, overvoltages, surges, line noise, harmonic distortion, electrical impulses and frequency variations.
Double Conversion Online UPSes can be transformer-based or transformerless.
In a traditional transformer-based UPS, the power flows via the rectifier, inverter and transformer to the output, with the transformer used to step up the AC voltage levels, protect the UPS from load disruptions and provide galvanic isolation.
Transformerless UPSes operate in the same way, apart from one key difference. They use insulated-gate bipolar transistors (IGBTs) that are capable of dealing with high voltages, eliminating the need for a step-up transformer after the inverter. This improves the energy efficiency of transformer-free uninterruptible power supplies.
Shop for a UPS on our online store or let our experienced technical sales team advise you on the correct UPS for your application: 011 886 7874 or sales@sinetech.co.za.
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All Products, UPS, UPS 5kVA and Under, UPS SALE
LH700 – 700VA Double Conversion Online Uninterruptible Power Supply
All Products, UPS, UPS 5kVA and Under, UPS SALELH700 – 700VA Double Conversion Online Uninterruptible Power Supply
NOTE: This UPS does not include internal or external batteries; these will need to be purchased separately. You will need 2 x 12V connected in series to form 24V. If you require assistance determining your backup time, please contact shoponline@sinetech.co.za.
Protect your costly, sensitive equipment and valuable data from power interruptions, power surges and power spikes with an uninterruptible power supply (UPS). Sinetech offers predesigned and turnkey UPS solutions for applications ranging from a single personal computer to large data centres and server rooms.
SKU: LH700
SKU: LH700 -
All Products, UPS, UPS 5kVA and Under, UPS SALE
LT1000 – 1000VA Line Interactive Uninterruptible Power Supply
All Products, UPS, UPS 5kVA and Under, UPS SALELT1000 – 1000VA Line Interactive Uninterruptible Power Supply
NOTE: This UPS does not include internal or external batteries; these will need to be purchased separately. You will 3 x 12V connected in series to form 36V. If you require assistance determining your backup time, please contact shoponline@sinetech.co.za.
Protect your costly, sensitive equipment and valuable data from power interruptions, power surges and power spikes with an uninterruptible power supply (UPS). Sinetech offers predesigned and turnkey UPS solutions for applications ranging from a single personal computer to large data centres and server rooms.
SKU: LT1000
SKU: LT1000 -
All Products, UPS, UPS 5kVA and Under, UPS SALE
MHC2000 – 2000VA Double Conversion Online Uninterruptible Power Supply
All Products, UPS, UPS 5kVA and Under, UPS SALEMHC2000 – 2000VA Double Conversion Online Uninterruptible Power Supply
This unit is sold with 6 x 12V 7.2Ah Internal Batteries.
Protect your costly, sensitive equipment and valuable data from power interruptions, power surges and power spikes with an uninterruptible power supply (UPS). Sinetech offers predesigned and turnkey UPS solutions for applications ranging from a single personal computer to large data centres and server rooms.
SKU: MHC2000
SKU: MHC2000 -
All Products, Best Seller Clearance Sale, UPS, UPS 11kVA and over, UPS SALE
OPGL015033C 3P/3P Input Power Factor Correction, Transformerless Online Omnipower UPS
All Products, Best Seller Clearance Sale, UPS, UPS 11kVA and over, UPS SALEOPGL015033C 3P/3P Input Power Factor Correction, Transformerless Online Omnipower UPS
NOTE: This UPS does not include internal or external batteries; these will need to be purchased separately. If you require assistance determining your backup time, please contact shoponline@sinetech.co.za.
Protect your costly, sensitive equipment and valuable data from power interruptions, power surges and power spikes with an uninterruptible power supply (UPS). Sinetech offers predesigned and turnkey UPS solutions for applications ranging from a single personal computer to large data centres and server rooms.
SKU: OPGL015033C -
All Products, Best Seller Clearance Sale, UPS, UPS 11kVA and over, UPS SALE
OPGL02033C 3P/3P Input Power Factor Correction, Transformerless Online Omnipower UPS
All Products, Best Seller Clearance Sale, UPS, UPS 11kVA and over, UPS SALEOPGL02033C 3P/3P Input Power Factor Correction, Transformerless Online Omnipower UPS
NOTE: This UPS does not include internal or external batteries; these will need to be purchased separately. If you require assistance determining your backup time, please contact shoponline@sinetech.co.za.
Protect your costly, sensitive equipment and valuable data from power interruptions, power surges and power spikes with an uninterruptible power supply (UPS). Sinetech offers predesigned and turnkey UPS solutions for applications ranging from a single personal computer to large data centres and server rooms.
SKU: OPGL02033C -
All Products, Best Seller Clearance Sale, UPS, UPS 11kVA and over, UPS SALE
OPGL03033 3P/3P Input Power Factor Correction, Transformerless Online Omnipower UPS
All Products, Best Seller Clearance Sale, UPS, UPS 11kVA and over, UPS SALEOPGL03033 3P/3P Input Power Factor Correction, Transformerless Online Omnipower UPS
NOTE: This UPS does not include internal or external batteries; these will need to be purchased separately. If you require assistance determining your backup time, please contact shoponline@sinetech.co.za.
Protect your costly, sensitive equipment and valuable data from power interruptions, power surges and power spikes with an uninterruptible power supply (UPS). Sinetech offers predesigned and turnkey UPS solutions for applications ranging from a single personal computer to large data centres and server rooms.
SKU: OPGL03033 -
All Products, Best Seller Clearance Sale, UPS, UPS 11kVA and over, UPS SALE
OPGT01533 3P/3P Standard Rectifier, with Output Transformer Online Omnipower UPS
All Products, Best Seller Clearance Sale, UPS, UPS 11kVA and over, UPS SALEOPGT01533 3P/3P Standard Rectifier, with Output Transformer Online Omnipower UPS
NOTE: This UPS does not include internal or external batteries; these will need to be purchased separately. If you require assistance determining your backup time, please contact shoponline@sinetech.co.za.
Protect your costly, sensitive equipment and valuable data from power interruptions, power surges and power spikes with an uninterruptible power supply (UPS). Sinetech offers predesigned and turnkey UPS solutions for applications ranging from a single personal computer to large data centres and server rooms.
SKU: OPGT01533 -
All Products, Best Seller Clearance Sale, UPS, UPS 6kVA to 10kVA, UPS SALE
OPN10TEB High Performance True Sinewave True Double Conversion Omnipower Online UPS
All Products, Best Seller Clearance Sale, UPS, UPS 6kVA to 10kVA, UPS SALEOPN10TEB High Performance True Sinewave True Double Conversion Omnipower Online UPS
NOTE: This UPS does not include internal or external batteries; these will need to be purchased separately. If you require assistance determining your backup time, please contact shoponline@sinetech.co.za.
Protect your costly, sensitive equipment and valuable data from power interruptions, power surges and power spikes with an uninterruptible power supply (UPS). Sinetech offers predesigned and turnkey UPS solutions for applications ranging from a single personal computer to large data centres and server rooms.
SKU: OPN10TEB -
All Products, UPS, UPS 6kVA to 10kVA, UPS SALE
OPT3110T- 3P/3P Input Power Factor Correction, Transformerless Online Omnipower UPS
All Products, UPS, UPS 6kVA to 10kVA, UPS SALEOPT3110T- 3P/3P Input Power Factor Correction, Transformerless Online Omnipower UPS
NOTE: This UPS does not include internal or external batteries; these will need to be purchased separately. If you require assistance determining your backup time, please contact shoponline@sinetech.co.za.
Protect your costly, sensitive equipment and valuable data from power interruptions, power surges and power spikes with an uninterruptible power supply (UPS). Sinetech offers predesigned and turnkey UPS solutions for applications ranging from a single personal computer to large data centres and server rooms.
SKU: OPT3110T-3/8/INT
SKU: OPT3110T-3/8/INT