Device for calibrating and testing ring-shaped current clamps

Details Device for calibrating and testing ring-shaped current clamps Device for calibrating and testing ring-shaped current clamps

1989-10-26

1991-10-01

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Transformer testing

324601, G01R 2702

Patent

active

050537164

ABSTRACT:
A device for calibrating and testing ring-shaped current clamps comprises a calibration housing with an outer conductor enclosing the current clamp, and an inner conductor passing through the current clamp. The outer conductor encloses the current clamp on all sides and is adapted to the shape of the current clamp. The calibration housing also exhibits, with the current clamp accommodated therein, an impedance Z.sub.L which is predetermined by a measuring system. These measurement make it possible to measure the frequency response of the current clamp precisely, up into the GHz range. The calibration housing exhibits transitions which are conically tapered towards the connections (6, 7).

REFERENCES:
patent: 3359488 (1967-12-01), Park
patent: 4281284 (1981-07-01), Stutz et al.
patent: 4607211 (1986-08-01), Eissmann
patent: 4810954 (1989-03-01), Fam
Eaton Corporation, Bulk Current Injection Probes and Broadband Power Amplifiers.
Siemens Components, vol. 20, No. 6, Dec. 1985 (Berlin, DE), pp. 237-240, H. A. Fritsche, "Measuring Methods for Testing the Screening Efficiency of Plug Connectors".
IEEE Transactions on Power Apparatus and Systems, vol. PAS-90, No. 1, Jan./Feb. 1971, pp. 318-324, T. Michael Sauders, "A Wide Range Current Comparator System for Calibrating Current Transformers".

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