Contents
How long do transient voltages last in a circuit?
Voltage transients normally last only about 50 microseconds (micro = .0 0 0 0 0 1–one millionth) and current transients last typically 20 microseconds according to the ANSI C62.41-1991 which is the standard for transients in facilities operating under 600 Volts.
What are the benefits of transient voltage suppression?
Effective transient voltage suppression equipment can double or triple the life of electrical and electronic equipment. A systems approach to transient voltage surge suppression can result in dramatic performance in terms of return-on investment.
How is target impedance and transient current related?
Target Impedance Definition ” Based on Ohms Law ” Two easily understood and difficult to obtain parameters Tolerance \ Transient current ” Can be expressed as percentage of maximum current ” Target impedance is a function of frequency if tolerance is a function of frequency \ Transient current is a function of frequency
How are transient voltages damped in electrical systems?
1. Mid-to-Low Frequency Transients, like lightning and utility capacitor switching propagate (travel) very well on electrical systems. Higher amplitudes tend to be damped by the building’s distribution system at voltages above 16,000 volts. There is almost no damping below 10,000 volts.
How long does an impulsive low frequency transient last?
Each type of transient can be associated with a group of phenomena occurring on the power system. The impulsive low-frequency transient rises in 0.1 ms and lasts more than 1 ms. Its companion, the oscillatory low-frequency transient, contains frequency components up to 5 kHz.
Where do high frequency transients usually come from?
High Frequency transients, however, are usually only seen near the source. This means that surge suppression equipment installed a distance away will never see the effect. It is for this reason that multiple suppressors are recommended within the facility. Where do Transient voltages come from?