EP 0326449 B1 19930929 - ELECTROMAGNETIC TRIP DEVICE WITH AN ADJUSTABLE TRIP LEVEL
Title (en)
ELECTROMAGNETIC TRIP DEVICE WITH AN ADJUSTABLE TRIP LEVEL
Publication
Application
Priority
FR 8801100 A 19880128
Abstract (en)
[origin: EP0326449A1] The adjusting range for the trip levels of a magnetic trip device with plunger core is increased by providing in the moveable plunger core (20), a throat (56) whose edges (60, 62) define pole surfaces delimiting air-gaps (E2, E3) with the edges of the yoke (10) so as to generate, in the position of minimum adjustment, a force (F2) adding to the force of attraction (F1) of the plunger core (20) by the stationary core (18), and conversely a force (F3) in the position of maximum adjustment subtracting from the force (F1) of attraction of the moveable plunger core (20). The trip device excitation coil is offset relative to the yoke (10) so as to enhance the magnitude of the adjustment range, and a return device with adjustable stop and with return force which decreases as a function of the approaching of the moveable core (20) and of the stationary core (18), contributes to enhancing this adjustment range for the trip levels. <IMAGE>
IPC 1-7
IPC 8 full level
H01H 3/28 (2006.01); H01H 33/38 (2006.01); H01H 71/24 (2006.01); H01H 71/74 (2006.01)
CPC (source: EP US)
H01H 71/2454 (2013.01 - EP US); H01H 71/7463 (2013.01 - EP US); H01H 71/2463 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
EP 0326449 A1 19890802; EP 0326449 B1 19930929; DE 68909431 D1 19931104; DE 68909431 T2 19940505; ES 2046495 T3 19940201; FR 2626713 A1 19890804; FR 2626713 B1 19900601; JP 2845917 B2 19990113; JP H01225025 A 19890907; US 4939492 A 19900703
DOCDB simple family (application)
EP 89400092 A 19890112; DE 68909431 T 19890112; ES 89400092 T 19890112; FR 8801100 A 19880128; JP 1935189 A 19890127; US 29836589 A 19890118