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On circuits protected by gfcis (ground fault current interrupters), leakage current can cause unnecessary and intermittent tripping There are always extraneous currents flowing in the safety ground conductor. In extreme cases, it can cause a rise in voltage on accessible conductive parts.
[8][13] in addition to resistive leakage, current can also be induced. Leakage current is the current that flows through the protective ground conductor to ground Leakage currents are currents that are derived from normal and abnormal connections of the source to the safety earth
In general, leakage currents are more easily identified that ground currents
Leakage currents often flow back to the source through the associated ground conductor. A sensitive current transformer connected to a monitoring device can measure leakage current The procedure for measuring ground fault current flow is to place the phase conductors and the neutral conductor through a current transformer (ct) as shown in fig How is leakage current measurement performed
Direct measurement direct measurement has precision and a meter especially designed for determining leakage currents is used The current flowing in the ground conductor is measured by connecting the meter in series with the grounding connection of the device concerned Leakage current clamp meter is the most popular device used to measure leakage. In electrical engineering and electronics, current leakage is a common yet often overlooked issue
It can lead to energy wastage, reduced efficiency, and even pose safety risks
This post will dive deep into what current leakage is, its causes, and effects, and how to prevent it. The maximum allowed ground leakage current is a few milliamps (thousands of an amp) Comprehensive guide on calculating ground leakage current for circuit analysis, safety compliance, and detecting wiring issues.
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