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What Is Battery Impedance Testing?
Impedance testing for batteries is a proven way of preventing battery failure by identifying early signs of weakness...
How Is UPS Resilience Measured (MTBF, MTTR, Availability)?
There are two key concepts to measuring the resilience of an uninterruptible power supply: Reliability covers the ability of...
What Is Electrical Noise?
In electronics, ‘noise’ is an unwanted high-frequency disturbance or interference with the...
Why Use An External Maintenance Bypass Switch With A UPS?
An external maintenance bypass switch enables a UPS system to be electrically isolated – taken out of the critical power circuit –...
When Should I Use A Generator As Well As A UPS?
Generators are used by organisations whose machinery and IT equipment must remain online at all times during an extended power outage. While...
What’s The Difference Between Linear And Non-Linear Loads?
AC electrical loads are referred to either as linear or non-linear depending on how they draw current from the mains power supply...
What Does Power Factor Mean With A UPS?
Power factor (pf) is the difference between actual energy consumed (Watts) and the apparent power (Volts multiplied by...
What Is Galvanic Isolation?
Galvanic isolation separates the input and output supplies to a device so that energy flows through a field rather than via...
What are the differences between 'Online' and 'Offline' UPS?
EN/IEC 62040-3 defines three generic Static UPS topologies. Each topology is then further classified based on its output waveform and dynamic...
What Do The Different Emergency Response Times For UPS Repairs Mean?
Emergency Response Times when there’s a fault or failure with an uninterruptible power supply should be clearly spelled out in the...

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