초록 ▼

A high voltage power cable termination with a current lead, a power cable having a first tube and an outer conductor, e.g., a superconductor, whose electrically conducting properties improve at low temperatures, arranged around the first tube and intended in use to be cooled to low temperatures by c

A high voltage power cable termination with a current lead, a power cable having a first tube and an outer conductor, e.g., a superconductor, whose electrically conducting properties improve at low temperatures, arranged around the first tube and intended in use to be cooled to low temperatures by cryogenic fluid flowing through the first tube, a joint for electrically connecting one end of the current lead to the conductor at one end of the cable at or adjacent to one of the first tube, and a second tube communicating with the first tube at or adjacent to the joint for conveying cryogenic fluid to or from the first tube. The first and the second tube are arranged so that, in use, no cryogenic fluid conveyed by the tubes contacts the conductor or the current lead at the joint. The invention also relates to electrical apparatus, e.g., a high voltage induction device, having such a termination.

대표청구항 ▼

A high voltage power cable termination with a current lead, a power cable having a first tube and an outer conductor, e.g., a superconductor, whose electrically conducting properties improve at low temperatures, arranged around the first tube and intended in use to be cooled to low temperatures by c

A high voltage power cable termination with a current lead, a power cable having a first tube and an outer conductor, e.g., a superconductor, whose electrically conducting properties improve at low temperatures, arranged around the first tube and intended in use to be cooled to low temperatures by cryogenic fluid flowing through the first tube, a joint for electrically connecting one end of the current lead to the conductor at one end of the cable at or adjacent to one of the first tube, and a second tube communicating with the first tube at or adjacent to the joint for conveying cryogenic fluid to or from the first tube. The first and the second tube are arranged so that, in use, no cryogenic fluid conveyed by the tubes contacts the conductor or the current lead at the joint. The invention also relates to electrical apparatus, e.g., a high voltage induction device, having such a termination. data, changed by said step of changing, from said first storage device to a non-volatile second storage device, on condition that reception of the setting event has intermitted for more than a predetermined time. 8. A method as claimed in claim 7 wherein the tone control data is tone color data. 9. A method as claimed in claim 7 which further comprises a step of, when the setting event is received by said step of receiving while the tone control data changed by said step of changing is being transferred by said step of transferring, suspending a transfer of the changed tone control data by said step of transferring, and also destroying the tone control data already transferred to said second storage device, and wherein said step of transferring, when new tone control data is to be transferred after suspension of the tone control data by said step of suspending, the new data into an area of said second storage device where the destroyed data has so far been stored. 10. A method for managing saving of tone control data in an apparatus using the tone control data, said method comprising the steps of: selecting one operation mode of said apparatus from among a plurality of operation modes including a setting mode, wherein said apparatus operates in the operation mode selected by said step of selecting: receiving a setting event while said apparatus is operating in the setting mode selected by said step of selecting; and changing, in accordance with the setting event received by said step of receiving, tone control data stored in a volatile first storage device while said apparatus is operating in said setting mode selected by said step of selecting; and transferring the tone control data, changed by said step of changing, from said first storage device to a non-volatile second storage device, when said operation mode is selected by said step of selecting is changed from said setting mode to another one of the operation modes. 11. A method as claimed in claim 10 wherein the tone control data is tone color data. 12. A machine-readable storage medium containing a group of instructions to cause said machine to implement a method for managing saving of tone control data, said method comprising the steps of: receiving a performance event; instructing, in accordance with the performance event received by said step of receiving, generation of a tone based on tone control data stored in a first storage device; receiving a setting event; changing, in accordance with the received setting event, the tone control data stored in said first storage device; and transferring, within an idle time period when operations by said steps are not being carried out, the tone control data, changed by said step of changing, from said first storage device to a non-volatile second storage device. 13. A machine-readable storage medium containing a group of instructions to cause said machine to implement a method for managing saving of tone control data, said method comprising the steps of: updating tone control data stored in a first storage device; transferring the updated tone control data stored in the first storage device into a non-volatile second storage device in order in which the tone control data have been updated by said step of updating, so as to store a plurality of sets of the updated tone control data in the second storage device; and storing, into said second storage device, identification information indicative of a newest one of the plurality of sets of the updated tone control data stored in said second storage device. 14. A machine-readable storage medium containing a group of instructions to cause said machine to implement a method for managing saving of tone control data, said method comprising the steps of: updating tone control data stored in a first storage device; transferring the tone control data, updated by said step of updating, to a non-volatile second storage device; receiving a performance ev ent; suspending, in response to reception of the performance event, a transfer of the tone control data being carried out by said step of transferring at the time of the reception of the performance event; instructing, in accordance with the received performance event, generation of a tone based on the tone control data stored in said first storage device; and resuming the transfer of the tone control data suspended by said step of suspending, after completion of the tone generation corresponding to the performance event. 15. A machine-readable storage medium containing a group of instructions to cause said machine to implement a method for managing saving of tone control data, said method comprising the steps of: receiving a setting event; changing, in accordance with the setting event received by said step of receiving, tone control data stored in a first storage device; and transferring the tone control data, changed by said step of changing, from said first storage device to a non-volatile second storage device, on condition that reception of the setting event has intermitted for more than a predetermined time. 16. A machine-readable storage medium containing a group of instructions to cause said machine to implement a method for managing saving of tone control data in an apparatus using the tone control data, said method comprising the steps of: selecting one operation mode of said apparatus from among a plurality of operation modes including a setting mode, wherein said apparatus operates in the operation mode selected by said step of selecting; receiving a setting event while said apparatus is operating in the setting mode selected by said step of selecting; changing, in accordance with the setting event received by said step of receiving, tone control data stored in a volatile first storage device while said apparatus is operating in said setting mode selected by said step of selecting; and transferring the tone control data, changed by said step of changing, from said first storage device to a non-volatile second storage device, when said operation mode selected by said step of selecting is changed from said setting mode to another one of the operation modes. 17. A tone control apparatus comprising: a first storage device adapted to store tone control data; a non-volatile second storage device adapted to store tone control data; a performance event generation device adapted to generate a performance event; an input device adapted to generate a setting event for setting or changing tone control data; and a processor device coupled with said first and second storage devices, said performance event generation device and said input device, said processor device being adapted to: receive the performance event; instruct, in accordance with the received performance event, generation of a tone based on the tone control data stored in said first storage device; receive a setting event; change, in accordance with the received setting event, the tone control data stored in said first storage device; and transfer, within an idle time period when said processor device is not being engaged in any other operation, the changed tone control data from said first storage device to a non-volatile second storage device. 18. A tone control apparatus comprising: a first storage device adapted to store tone control data; a non-volatile second storage device adapted to store tone control data; and a processor device coupled with said first and second storage devices and adapted to: update the tone control data stored in said first storage device; transfer the updated tone control data stored in the first storage device into said non-volatile second storage device in order in which the tone control data have been updated so as to store a plurality of sets of the updated tone control data in the second storage device; and store, into said second storage device, identification information indicative o