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Sine wave
A fundamental waveform produced by periodic, regular oscillation that expresses the sine or cosine or a linear function of time or space or both.

Simple Network Management Protocol is a set of protocols for managing complex networks. SNMP works by sending messages, called protocol data units (PDUs), to different parts of a network. SNMP-compliant devices store data about themselves in Management Information Bases (MIBs) and return this data to the SNMP requesters.

Static Switch
A static switch is an “intelligent switch” used to select either the UPS’s inverter output voltage or the raw mains to supply the load. The selection is made by control logic which continually monitors the bypass (raw mains) and inverter voltages.

An abnormally high voltage lasting for a short period of time.

Three Phase
An electrical system with three different voltage lines with sine wave waveforms that are 120 degrees out of phase from one another.

Total Harmonic Distortion
The ratio of the rms sum of all the harmonic components and the fundamental signal.

An abnormal low voltage lasting for a longer period of time than a sag.

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