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What are the differences between 'Online' and 'Offline'?
Off-line (VFD) systems are usually low cost products designed for a simple one or two user PC installations, they offer little or no protection...
Can I add more UPS modules to the system when my load increases?
Yes, the MST, MPS and MHT ranges employ a plug and play parallel system that allows additional units to be added to an existing system at a...
What does Autonomy mean?
The battery duration at a specified load level is referred to as the battery “autonomy”. A UPS battery can be sized to support loads...
What Does Battery 'Design Life' Mean?
All batteries have a design life that can be used as an indicator as to their functional service life. The standard design life is 5 years,...
What Is A Static Inverter?
Generally used in Emergency Lighting applications, a Static Inverter will maintain power to lighting for a period of 1 hour or 3 hours (depending...
What is a Blackout?
A blackout is when the power totally fails. The damage that a blackout causes to your system depends a great deal on its timing. If the system...
What is a Bypass Switch?
Static Bypass switches are used to bypass the UPS normal operation, in cases of high inrush or fault conditions. Manual bypass switches are an...
Input filters or 12 pulse rectifiers?
With current recommendations demanding lower levels of input harmonics (THDi) it is more common for larger systems to require some form of input...
What is a Brownout?
A brownout, sometimes also called a ‘sag’, is a "dip" in the voltage level of the electrical line. When a brownout occurs,...
Why do you need a UPS?
An Uninterruptible Power Supply (UPS) is used to protect critical loads from mains supply problems, including spikes, voltage dips, fluctuations...

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