doi: 10.52899/24141437_2025_04_535
UDK: 621.373.1

Evaluation of pulse interference on a cable during indirect electrostatic discharge

Воршевский А. А., Воршевский П. А., Задорожный М. Е., Яковлев П. С.
Article language:
Citation Link: Worshevsky AA, Vorshevskii PA, Zadorozhny ME, Yakovlev PS. Evaluation of pulse interference on a cable during indirect electrostatic discharge. Transactions of the Saint Petersburg State Marine Technical University. 2025; 4(4):535–544. DOI: 10.52899/24141437_2025_04_535 EDN: BHILUI

Annotation

BACKGROUND: International and domestic standards require that technical equipment be resistant to electrostatic discharge. Testing experience shows that equipment designed without these requirements is disrupted by the discharge. The IEC ­61000-4-2 standard provides a test method and includes discharges into the equipment enclosure and nearby metal sheets. However, electrostatic discharges can also occur in remote equipment located near cable routes connected to the equipment. It is important to be able to predict the effects of remote discharges through external cables of technical equipment. AIM: The purpose of this work is to provide a mathematical model of induced voltages process in cables during remote electrostatic discharge, which will allow us to predict the effects of this type of discharge on various equipment. METHODS: The results of the work are based on the requirements of the Russian Maritime Register of Shipping for electromagnetic compatibility, the IEC 61000-4-2 standard. It is used the mathematical description of the effect of a discharge through a capacitive connection between an object and a cable, which is considered as a distributed parameter circuit. The calculations are performed using a mathematical package and verified by comparing the results with those obtained from the SPICE program and experimental data. RESULTS: Analytical expressions for calculating the induced voltage in cables caused by electrostatic discharge into an adjacent object are given, as well as the results of calculations with a wide variation of initial data. Graphs of voltage changes obtained by modeling and during field experiments are presented. Certified test generators are used as a source of discharges in experimental setup. The obtained dependencies are presented for determining the amplitude, front duration, and induced voltage duration on the cable, depending on the coupling capacitance and the voltage front duration on the object where the discharge occurred. CONCLUSIONS: The given expressions for calculating the induced voltage on cables and the results of the calculations are recommended for use in predicting possible levels of interference on cables during indirect electrostatic discharge. The obtained dependences of the amplitude, the duration of the front, the duration of the induced voltage on the cable from the capacitance of the connection and the duration of the voltage front on the equipment are suitable for an operational assessment of the expected parameters of interference on cables during the implementation of electromagnetic compatibility work. Keywords: indirect electrostatic discharge; cable; pulse interference; electromagnetic compatibility.

Bibliography

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