Testing loop impedance in an RCCB electrical test circuit

Details Testing loop impedance in an RCCB electrical test circuit Testing loop impedance in an RCCB electrical test circuit

2007-09-18

2007-09-18

Nguyen, Vincent Q. (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

C324S424000, C324S527000

Reexamination Certificate

active

11506605

ABSTRACT:
A method and apparatus for testing the loop impedance in residual current circuit breaker (RCCB) protected circuits is provided. An alternating test current is applied across the phase earth connections of a supply and a plurality of voltage samples are then taken across the connections. The voltage samples are subsequently transformed from time space to frequency space to allow the component due to the test current to be isolated. The loop impedance is then calculated.

REFERENCES:
patent: 5465287 (1995-11-01), Egozi
patent: 6225810 (2001-05-01), Godo et al.
patent: 6735066 (2004-05-01), Steffen
patent: 7170296 (2007-01-01), Batten et al.
patent: 2239530 (1991-07-01), None
patent: 0706663 (1997-10-01), None

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