-
公开(公告)号：US3577041A
公开(公告)日：1971-05-04
申请号：US3577041D
申请日：1969-03-10
Applicant: ASEA AB
Inventor： KRING ARNE , JOHANSSON ARNE
CPC classification number: H02H1/04
Abstract: An overcurrent relay circuit, the pickup value of which is substantially independent of the DC-component in an asymmetrical alternating current, has an input transformer, the magnetic circuit of which is provided with air gaps while the secondary load of this transformer is high-resistive. To the secondary winding of the transformer is connected a rectifier with a smoothing device connected to level-sensing circuit and an output magnetic relay in the output circuit of the level-sensing circuit.
Search Results
1
records
(took 0.01 seconds)
筛选
AND
AND
过滤
NOT
NOT
Scan to Join
