Internal transients are created from within a given facility, business or home. They can be either Impulse or RingWave type surges.
Impulse surges are caused by changes in voltage and can reach 6000 Volts and 3000 Amps.
RingWave surges are caused by changes in frequency. Surge levels can reach 6000 Volts and 500 Amps but are generally 2000 Volts and lower.
Internally generated surges account for 80% or more of surge related electronics & electrical damage within a facility. RingWaves are typically the most frequent surge, especially in busy commercial and industrial scenarios.
Surge related activities are the most overlooked and misdiagnosed power quality problem today.
Internal transients are created by everyday operations of electrical and electronic equipment.
changing the current flowing through an electrical circuit produces surges. Simply switching on a light, motor, copy
machine or other electrical device creates the abrupt change in current
Internally generated transients can be either random or repetitive. Turning on a light, motor or using a copier tends to be random. The operation of variable frequency drives, rectifiers and other switch-mode power supplies can produce repetitive surges with incredible abundance.
Switching larger loads produce larger transients with larger surge energies. Examples of larger transient producing
equipment include; electric welders, HVAC compressors and motors.
Internal surges can occur hundreds to thousands of times per day in a residential setting. They can occur hundreds of thousands to millions of times per day in a busy industrial or commercial environment.
Quietly Damaging. Even at low levels, surges occurring thousands to millions of times per day are harmful. These surges chip away at sensitive circuits within equipment.
The quiet, repetitive damage causes deterioration over time. Deterioration leads to system disrupts, timing issues, computer glitches and light flicker. These symptoms lead to the inevitable. Hard Failure. Typically, its Premature Failure.
Internal transients can produce immediate damage. Power quality monitoring equipment has shown surge activity as high as 6000+ volts at the outlet. Yes... the outlet.
Damage, resulting from transient activity, including premature equipment failure, can be prevented.
The simple, normal, everyday operation of electrical and electronic equipment create transients. These voltage and frequency surges vary in magnitude and occurrence, so in correlation, they produce varying degrees of damage with each event.
Regardless, electrical systems and electronic equipment are increasingly susceptible to transient voltage activity.
Note: Not all SPDs protect effectively against both Impulse and RingWave type transients. Our SPDs Do.
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