Transients – Their Impact on the Power Quality Industry
Years ago, transients were thought to be non-existent figments of the imagination of persons who sold unnecessary protection for an imaginary problem. The education and experience of the last several years have clearly demonstrated that transients are anything but imaginary.
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What causes electrical transients?
The simple act of turning on (or off) a light, motor, copy machine or any other electrical device can disturb the electrical circuit and create transients. In general, the larger the load current the greater the disturbance when the load is switched off or on.
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What is a transient
An electrical transient is a temporary excess of voltage and/or current in an electrical circuit which has been disturbed. Transients are short duration events, typically lasting from a few thousandths of a second (milliseconds) to billionths of a second (nanoseconds), and they are found on all types of electrical, data, and communications circuits. |
What is let-through voltage?
Transient suppression voltage or let-through voltage is defined in UL 1449 as "The maximum peak voltage occurring within 100 microseconds after the application of the test wave." What we are really talking about is the maximum amplitude or height of the voltage after the SPD has done its job. |
What safety listings do you carry?
The safety listings for the various I.T. SPDs vary by product design and intended application as required by the marketplace. The current safety listings are provided on the product data sheets.
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