Method and apparatus for measuring current

Details Method and apparatus for measuring current Method and apparatus for measuring current

2005-05-25

2010-06-29

Tang, Minh N (Department: 2829)

Electricity: measuring and testing

Magnetic

With compensation for test variable

C324S1540PB

Reexamination Certificate

active

07746068

ABSTRACT:
Current testing/measuring apparatus10comprises a flexible member12having a first end14and a second end16. In use, the flexible member12is arranged to locate around a conductor11carrying a current to be measured. In particular, the current measuring apparatus10comprises a Rogowski coil. The ends of the flexible member12are coupled together in use but a gap is created between the ends. This distance can generate errors in the current measurement and the present invention provides compensation means28in the form of a compensation windings. The compensation windings comprise a planar spiral conductor provided on a printed circuit board to compensate for the separation distance between the first end and the second end.

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International Search Report for PCT Application No. PCT/GB2005/002099 mailed on Nov. 8, 2005.
Written Opinion of the International Searching Authority for PCT/GB2005/002099 mailed on Nov. 8, 2005.

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