Apparatus for automatically measuring a relatively wide...

Details Apparatus for automatically measuring a relatively wide... Apparatus for automatically measuring a relatively wide...

2006-12-12

2006-12-12

Karlsen, Ernest (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural ranges, scales or registration rates

C324S551000, C340S870010

Reexamination Certificate

active

07148674

ABSTRACT:
A leakage current measurement apparatus for measuring leakage currents is disclosed. The leakage current measurement apparatus automatically selects one of non-inductive shunt resistors of 10Ω, 100Ω, and 1000Ω and measures leakage currents of an outdoor isolation material for an ultra-high voltage. Additionally, the leakage current measurement apparatus is capable of measuring a relatively wide range of leakage currents with a relatively high precision, even at a remote location, as a measurement range is automatically adjusted within measurement ranges preset by a user when leakage currents of an outdoor isolation material change, and being protected against a surge possibly generated by an ultra-high voltage. Also, it can remotely measure in real-time leakage currents of an outdoor isolation material installed at a remote location over Ethernet.

REFERENCES:
patent: 4801937 (1989-01-01), Fernandes
patent: 4904996 (1990-02-01), Fernandes
patent: 5341088 (1994-08-01), Davis

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