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Battery Testers Constant Current / Current Sink
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Click on Drawing Below to view PDF version of Schematic |
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Dave's Circuits
Circuits designed by David Johnson, P.E.
Master Category List - Dave's Circuits
Last Updated on:
Tuesday, October 13, 2009 01:23 PM |
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Resistance Meters |
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UL GROUND RESISTANCE TESTER
UL requires that an electrical system using a metal chassis earth ground connection have a resistance of less than 0.1 ohms. This resistance must be tested with actual line current in excess or 10 amps. The circuit shown uses a couple of LEDs to indicate if in fact the resistance
is less than 0.1 ohms. It uses a modified transformer to produce a 2.5vac output with at least 10 amps of supply current. |
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Click on Drawing Below to view PDF version of Schematic |
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Resistance Meters
Master Schematic Category List - David A. Johnson, P.E. |
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