Miniature device for measuring temperature of intermediate joint of power cables
A technology for power cables and intermediate joints, which is applied in the field of miniature temperature measuring devices for intermediate joints of power cables, and can solve problems affecting the reliability of urban power supply
Active Publication Date: 2013-06-26
珠海众盛电力科技有限公司
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Problems solved by technology
The number of cable faults in the middle joint accounts for more than 70% of the total number of cable faults, and the failure of the middle joint will cause a power outage of the entire line for two to five hours, greatly affecting the reliability of urban power supply
Method used
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[0015] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0016] In the embodiment of the present invention, the 10kv heat-shrinkable power cable intermediate joint is taken as an example, and the other 6kv, 10kv, 20kv, 35kv cold-shrinkable power cable intermediate joints and heat-shrinkable power cable intermediate joints refer to this implementation method.
[0017] The invention provides a miniature temperature measuring device for an intermediate joint of a power cable, which is used for on-line monitoring of the temperature of an intermediate joint of cold-shrinkable and heat-shrinkable power cables. The connecting pipe 8, the copper shielding mesh 9 for repairing the cable insulation layer, the sem...
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The invention discloses a miniature device for measuring the temperature of an intermediate joint of power cables, and the miniature device is used for on-line monitoring the temperature of the intermediate joint of cold shrinkage type and hot shrinkage type power cables. The intermediate joint of the power cables comprises a copper core and a connecting pipe for pressing the copper core, the miniature device is installed at the power cable intermediate joint and is tightly close to the shrinkable tubing on the inner side of copper shielding grid, the miniature device comprises a self-powering device, temperature sensors and a data acquisition and communication module, the temperature sensors are uniformly distributed on the shrinkable tubing on the inner side of the copper shielding gridon the periphery of the connecting pipe, the data acquisition and communication module is annularly installed at the lap joint site between the shrinkable tubing on the inner side of the copper shielding grid and a semiconductor layer of a power cable, and the data acquisition and communication module adopts the 2.4G wireless communications technology to communicate with outside. The miniature device disclosed by the invention can accurately reflect the actual temperature inside the power cable intermediate joint, and realizes single-phase temperature out-of-limit alarm and inter-phase temperature comparison out-of-limit alarm.
Description
technical field [0001] The invention belongs to the field of on-line monitoring of power cable status, and particularly relates to a miniature temperature measuring device for an intermediate joint of a power cable, which is used for on-line monitoring of the temperature of an intermediate joint of a cold-shrinkable power cable and an intermediate joint of a heat-shrinkable power cable. Background technique [0002] In order to improve the reliability of power supply, more and more power cables are used in urban power supply lines, and cable intermediate joints are used to realize the connection between cables. The number of cable faults in the middle of the cable accounted for more than 70% of the total number of cable faults, and the failure of the middle connector would cause a power outage of the entire line for two to five hours, which greatly affected the reliability of the city's power supply. Due to the heat generated by the high contact resistance of the power cable...
Claims
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IPC IPC(8): G01K7/18G01K7/22G01K7/00
CPCY02B60/50
Inventor 朱国防董晓峰
Owner 珠海众盛电力科技有限公司