Abstract: A current sensing device and a residual current detection device are described having a temperature compensation capability so that residual current can be directly measured to a high degree of precision in the background of a high load current. The residual current device comprises a plurality of resistive shunts for connection in respective ones of a plurality of lines through which current can flow to and from a load, and a detector means sensitive to the voltage developed across each of the shunts to detect any imbalance between the currents flowing through the shunts.
Type:
Grant
Filed:
July 3, 2002
Date of Patent:
September 14, 2004
Assignee:
Delta Electrical Limited
Inventors:
Robert Charles Skerritt, Mark David Crosier, Martin Anthony Murray, Brian Martin Reeder
Abstract: A residual current detection device comprising a plurality of resistive shunts for connection in respective ones of a plurality of lines though which current can flow to and from a load, and detector means sensitive to the voltage developed across each of the shunts to detect any imbalance between the currents flowing though the shunts.
Type:
Grant
Filed:
December 27, 2000
Date of Patent:
September 7, 2004
Assignee:
Delta Electrical Limited
Inventors:
Robert Charles Skerritt, Mark David Crosier, Martin Anthony Murray, Brian Martin Reeder
Abstract: A current sensor which has a rigid metallic link member having two end portions of conductive material and an intermediate portion of resistive material interconnecting the end portions. An integrated circuit analog to digital converter is mounted on the link member. The converter has analog input terminals for connection to respective ones of the two end portions of the link member and digital output terminals for connection to a processing apparatus.
Type:
Grant
Filed:
December 27, 2000
Date of Patent:
November 11, 2003
Assignee:
Delta Electrical Limited
Inventors:
Robert Charles Skerritt, Mark David Crosier, Martin Anthony Murray, Brian Martin Reeder