The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 18, 1977
Filed:
Mar. 17, 1975
Ronald M Reckard, Pittsfield, MA (US);
General Electric Company, , US;
Abstract
The arrester includes a plurality of gap units and nonlinear resistance valve units connected in series between the line voltage and ground. A series line of capacitors across the gap units provides capacitive grading for fast high frequency impulses. A series line of resistors across the gap units provides resistive grading for slow, low frequency impulses. The gap units comprise control gap units for controlling the initial sparkover of the arrester and cascade gap units. The control gap units all have substantially equal sparkover voltages for slow impulses. The improvement comrises that there is connected across at least one of the control gap units and in series with the series line of capacitors, a linear upset resistor having a resistance chosen so that the time constant of the resistor and capacitive grading line is about 0.25 microseconds.