System for monitoring heater elements of electric furnaces

Details System for monitoring heater elements of electric furnaces System for monitoring heater elements of electric furnaces

1981-08-26

1983-12-20

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219483, 219497, 340640, 340652, 340664, 323246, H05B 102

Patent

active

044219768

ABSTRACT:
A system for monitoring heater elements of electric furnaces so as to identify individual failures, such system comprising an arrangement for detecting the electrical open state of any one of the heater elements, including a current transformer for monitoring current flow; and the capability of monitoring element voltage, such that no element current in the presence of a minimum element voltage is defined as, or taken to be, a failure; further including the provision of a master alarm indication of a defined failure in any of the elements and also an individual alarm indication to indicate which element has failed.

REFERENCES:
patent: 3924102 (1975-12-01), Hanekom
patent: 4078168 (1978-03-01), Kelly
patent: 4162379 (1979-07-01), Sebers et al.
patent: 4206552 (1980-06-01), Pomerantz

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