Tingle voltage filter

Details Tingle voltage filter Tingle voltage filter

1989-12-13

1991-05-21

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

324509, H02H 300

Patent

active

050180428

ABSTRACT:
A tingle voltage filter, comprising a saturating reactor connected between the neutral and the local bonding to ground of an electrical service so as to reduce ground currents, is associated with a device to determine whether the potential, referred to a remote ground, at the bonding significantly exceeds that at the neutral, also referred to a remote ground, thus indicating a wiring fault which may make desirable removal of the impedance of the filter from the local connection between the neutral and the bonding. Upon detecting such a condition, the device closes a switch to bypass the filter. The device also contains indicators of elevated potential of the local ground bonding relative to the remote ground, and elevated potential of the neutral relative to the remote ground, to provide further indications of abnormal conditions and of proper operation of the filter.

REFERENCES:
patent: 3569826 (1971-03-01), Burnett
patent: 3757169 (1973-09-01), Beresnikow
patent: 3760298 (1973-09-01), Pell
patent: 3947759 (1976-03-01), Briggs
patent: 3963981 (1976-06-01), Vis
patent: 4188574 (1980-02-01), Allington
patent: 4573098 (1986-02-01), Williston
patent: 4591941 (1986-05-01), Gruchalla et al.

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