Inductive short finder

Details Inductive short finder Inductive short finder

1994-02-01

1997-04-15

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 58, 361115, H02H 300

Patent

active

056216009

ABSTRACT:
A portable apparatus to test an automobile wiring harness for the location of a short in one of the wires. A transmitter is used to apply a low frequency, low duty cycle, pulsed signal to the wire under test. A receiver, with an inductive sensor, detects magnetic fields generated by the pulsed signal current flow between the transmitter and the short. The receiver generates a humanly discernable signal in response to the detected magnetic field. The operator finds the short by following the detected magnetic field of the signal pulse through the wire under test. By noting the location of a dramatic discontinuity in magnetic field strength, the operator can gauge the location of the short in the wire. The low voltage amplitude, low duty cycle, pulse signal allows the transmitter to be operated with a small battery. The low power signals also provide safety to circuits connected to the wire. The low frequency and power of the pulsed signal minimizes coupling between wires. The substantially contained magnetic field allows the operator of the portable receiver unit to pinpoint the location of the short.

REFERENCES:
patent: 4518911 (1985-05-01), Cass

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