Split acquisition terminal for recognition of low-voltage faulted cables

Abstract

The invention discloses a split acquisition terminal for recognition of low-voltage faulted cables. The split acquisition terminal comprises a single-chip microcomputer, three split core type current transformers, a three-phase current detection chip, a wireless communication device, a power source and a clock circuit. The three split core type current transformers are used for acquiring data of three-phase current on a three-phase cable correspondingly; the three-phase current detection chip is connected with the three split core type current transformers and used for reading the data of the three-phase current on the three-phase cable; the wireless communication device is used for sending the data of the three-phase current on the three-phase cable. The three-phase current detection chip, the wireless communication device, the power source and the clock circuit are all connected with the single-chip microcomputer. The split acquisition terminal for recognition of the low-voltage faulted cables has the advantages that real-time monitoring of low-voltage cable equipment can be realized, remote wireless transmission of fault or overload signals of the three-phase cables is realized, and real-time clocking is realized as well; testing the cables one by one is avoided, and accordingly emergency maintenance time is saved.

Description

technical field [0001] The invention relates to a separate collection terminal for identifying low-voltage faulty cables in the field of power grid maintenance. Background technique [0002] In the case that it is impossible to determine which cable is the faulty cable, the current practice is to test the incoming cables from the low-voltage switch of the upper level power supply to the branch box and the outgoing cables in the branch box one by one, which delays a lot of repair time. Extended area outages for longer periods of time. [0003] At present, in the operation and maintenance of low-voltage cables, it often happens that the fuse does not jump after the cable failure of the low-voltage branch box, but the low-voltage side switch of the upper-level power supply jumps off. The emergency repair personnel need to test each cable to determine whether it is faulty, resulting in the following: A problem: testing each cable will consume a lot of manpower, material resourc...

AI Technical Summary

Problems solved by technology

[0002] In the case that it is impossible to determine which cable is the faulty cable, the current practice is to test the incoming cables from the low-voltage switch of the upper level power supply to the branch box and the outgoing cables in the branch box one by one, which delays a lot of repair time. Longer Extended Area Outage

[0003] At present, in the operation and maintenance of low-voltage cables, it often happens that the fuse does not jump after the cable failure of the low-voltage branch box, but the low-voltage side switch of the upper-level power supply jumps off. The emergency repair personnel need to test each cable to determine whether it is faulty, resulting in the following: A problem: testing each cable will consume a lot of manpower, material resources and other emergency repair resources, which will increase the emergency repair time. It takes about 1.5 minutes to telemeter the insulation once, and it takes about 9 minutes to telemeter a cable; non-faulty cables need to be powered off at the same time, and the scope of the blackout is large. , the user has a long power outage time; if a withstand voltage test is required, it will take 5 minutes, which will cause additional damage to the non-faulty cable and reduce the service life of the cable

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