Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1995-05-09
1997-05-20
Wieder, Kenneth A.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324539, 324713, G01R 2708, G01R 3102
Patent
active
056315708
ABSTRACT:
A protective grounding jumper cable tester basically includes a housing, a direct current power supply, a pair of jumper attachment terminals, a pair of test probe terminals, a current applying circuit connected between the direct current power supply and the pair of jumper attachment terminals for applying a direct current through a jumper cable attached between the jumper attachment terminals, and a resistance sensing circuit connected to the test probe terminals for sensing resistance to the flow of the direct current through the jumper cable by using a pair of test probes connected to the test probe terminals. A protective grounding jumper cable testing method includes connecting a jumper cable that is to be tested between a pair of terminals, applying a direct current to the cable, observing a current sensing meter while adjusting the direct current flowing through the jumper cable, either continuing with testing of the jumper cable if the direct current can be adjusted to a first preselected quantity, retest the jumper cable after inspecting and maintaining it or reject the jumper cable, setting a resistance sensing meter to sense resistance within a first preselected test range, contacting a pair of test probes to the terminals to indicate the resistance of the jumper cable to the direct current, comparing the resistance indicated by the resistance sensing meter with the first preselected test range, and, based on the comparison, either accept the jumper cable, retest the jumper cable after inspecting and maintaining it or reject the jumper cable.
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INSPEC Patent Associated Literature Anderson et al. Journal of Physics vol. 8, No. 5 pp. 398-402 May 1975.
'Hubbell Incorporated
Do Diep
Presson Jerry M.
Swartz Michael R.
Wieder Kenneth A.
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