Arno John Tapani

6628494, Sep 30, 2003

Feb 26, 2001

09/793786

John C. Opfer - Chicago IL
Henry W. Kowalyshen - Niles IL
Joseph P. Moninski - Arlington Heights IL
Arno J. Tapani - Amherst NY

SC Electric Co. - Chicago IL

H01H 7300

361115, 361102, 361118, 361117

A multi-pole protective device and system for electrical power transmission and distribution systems is provided that operates a multi-pole tripping system at ground level from a line-potential tripping device contained within each pole of the multi-pole system. The system includes multiple pole-unit assemblies each of which is totally self-contained and generates a tripping signal in response to overcurrent conditions to operate a ground-potential operating mechanism. In one arrangement, the pole units each include an internal line-potential tripping arrangement that communicates a trip signal to a ground-potential operating mechanism of the pole unit and associated pole units of the protective device arrangement. In a preferred arrangement, the line-potential tripping arrangement includes an insulated member that is moved to transmit the trip signal from line potential to ground potential.

6423903, Jul 23, 2002

Nov 3, 2000

09/706143

Arno J. Tapani - Chicago IL

S C Electric Company - Chicago IL

H01B 1726

174142, 174138 R, 174140 R, 174174, 174212

A method and arrangement is provided for minimizing electrical field stress on circuit interrupters and their housings via the arrangement of the external sheds or skirts of the housing. In one arrangement, some of the sheds are grouped about each side of the open gap that is defined by the contacts of the circuit interrupter in an open position.