Power Quality is a term used to discuss events on electric power grids that can damage or disrupt sensitive electronic devices. Poor Power Quality also leads to increased power consumption. There are many ways in which a power feed can be poor quality and so no single figure can completely quantify the quality of a power feed.

Ideally electric power would be supplied as a sine wave with the amplitude and frequency given by national standards or system specifications with an impedance of zero ohms at all frequencies. No real life power feed will ever meet this ideal. It can deviate from it in the following ways.

• Variations in the peak or RMS Voltage: When the rms voltage exceeds the nominal voltage by a certain margin, the event is called a "swell or a "sag" is the opposite situation
• An "under voltage" occurs when the low voltage persists over a longer time period and “Over Voltage” is opposite of that.
• Variations in the frequency & Power Factor
• Variations in the wave shape - usually described as harmonics
• Quick and repetitive variations in the rms voltage. This produces flicker in lighting equipment.
• Abrupt, very brief increases in voltage, called "spikes", "impulses", or "surges.

Our warehouses are stocked with products that complement the solutions to these Power Quality problems. Our engineers Assemble, Install, Commission and maintain all the products.