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An electrical switching device, such as a receptacle, includes a line circuit having a first temperature, a neutral circuit having a second temperature, and a load terminal. Separable contacts are adapted to electrically connect the line circuit and the load terminal. An operating mechanism opens th

An electrical switching device, such as a receptacle, includes a line circuit having a first temperature, a neutral circuit having a second temperature, and a load terminal. Separable contacts are adapted to electrically connect the line circuit and the load terminal. An operating mechanism opens the separable contacts in response to a trip signal. A first diode temperature sensor outputs a first signal representative of the first temperature of the line circuit. A second diode temperature sensor outputs a second signal representative of the second temperature of the neutral circuit. A difference circuit determines a difference between the first and second signals. A trip circuit provides the trip signal as a function of the difference.

대표청구항 ▼

An electrical switching device, such as a receptacle, includes a line circuit having a first temperature, a neutral circuit having a second temperature, and a load terminal. Separable contacts are adapted to electrically connect the line circuit and the load terminal. An operating mechanism opens th

An electrical switching device, such as a receptacle, includes a line circuit having a first temperature, a neutral circuit having a second temperature, and a load terminal. Separable contacts are adapted to electrically connect the line circuit and the load terminal. An operating mechanism opens the separable contacts in response to a trip signal. A first diode temperature sensor outputs a first signal representative of the first temperature of the line circuit. A second diode temperature sensor outputs a second signal representative of the second temperature of the neutral circuit. A difference circuit determines a difference between the first and second signals. A trip circuit provides the trip signal as a function of the difference. of determining a plurality of RRO compensation value sets for a plurality of tracks on a rotating disk of a disk drive, wherein each track comprises a plurality of embedded servo sectors that define a circumferential path that may have RRO requiring compensation during track following and wherein the disk drive is initially manufactured and then shipped for installation in a host system, the method comprising: determining, during initial manufacturing of the disk drive, first RRO value sets for a first portion of the tracks to a first desired learning level by measuring the RRO for the first portion tracks based on at least a first predetermined number of disk rotations; and determining, after the disk drive is shipped for installation in the host system, RRO value sets for a second portion of the tracks to a second desired learning level by measuring the RRO for the second portion tracks based on at least a second predetermined number of disk rotations; wherein the first portion tracks are not adjacent to each other, each first portion track being separated from another first portion track by one second portion track; and wherein the tracks are bi-sequentially addressed from an outer-most first portion track to an inner-most first portion track and then from an inner-most second portion track to an outer-most second portion track. 8. A method of determining a plurality of RRO compensation value sets for a plurality of tracks on rotating disk of a disk drive, wherein each track comprises a plurality of embedded servo sectors that define a circumferential path that may have RRO requiring compensation during track following and wherein the disk drive is initially manufactured and then shipped for installation in a host system, the method comprising: determining, during initial manufacturing of the disk drive, first RRO value sets for a first portion of the tracks to a first desired learning level by measuring the RRO for the first portion tracks based on at least a first predetermined number of disk rotations; and determining, after the disk drive is shipped for installation in the host system, RRO value sets for a second portion of the tracks to a second desired learning level by measuring the RRO for the second portion tracks based on at least a second predetermined number of disk rotations; wherein the first portion tracks are not adjacent to each other; and wherein, before the step of determining the RRO value sets for the second portion tracks, the first portion tracks are interleaved with the second portion tracks and user data is stored only on the first portion tracks. 9. A method of determining a plurality of RRO compensation value sets as defined in claim 8, wherein, after the step of determining the RRO value sets for the second portion tracks, the user data stored on the first portion tracks is rewritten and stored on both the first and second portion tracks such that the data is written on adjacent tracks in sequential order. 10. A method of determining a plurality of RRO compensation value sets as defined in claim 1, wherein the first and second predetermined number of disk rotations is at least 100 disk rotations. 11. A method of determining a plurality of RRO compensation value sets as defined in claim 1, wherein the first and second predetermined number of disk rotations is at least 20 disk rotations. 12. A method of determining a plurality of RRO compensation value sets for a plurality of tracks on a rotating disk of a disk drive, wherein each track comprises a plurality of embedded servo sectors that define a circumferential path that may have RRO requiring compensation during track following and wherein the disk drive is initially manufactured and then shipped for installation in a host system, the method comprising: determining, during initial manufacturing of the disk drive, first RRO value sets for a first portion of the tracks to a first desired learning level by measuring the RRO for t