Electric meter box incoming and outgoing line sleeve with alarm and drainage functions

Abstract

The invention discloses an electric meter box incoming and outgoing line sleeve with alarm and drainage functions. The electric meter box incoming and outgoing line sleeve comprises a sleeve incomingline current transformer, an electric energy meter outgoing line current transformer, an electricity larceny alarm device, an elbow with a drainage nozzle, a tee joint with a drainage nozzle, a transverse pipe, a vertical pipe and a common elbow. The sleeve incoming line current transformer is additionally arranged at the starting end of the electric meter box incoming line sleeve, the outgoing line current transformer is additionally arranged between the electric energy meter and the electric meter box outlet, the secondary current differential signal is connected to the electricity larceny alarm device, and the alarm lamp is turned on to give an alarm when an electricity larceny phenomenon occurs, so that inspectors are reminded to pay attention to inspection. Due to the fact that the elbow with the drainage nozzle and the tee joint with the drainage nozzle are arranged at the bottom, the problem that accumulated water in the electric meter box incoming and outgoing line sleeve affects operation safety of a circuit can be effectively solved under the conditions that secondary workload does not need to be increased and electricity larceny possibility is not increased.

Description

Technical field [0001] The invention belongs to the field of electrical equipment, and relates to an electric meter box inlet and outlet bushing with alarm and drainage functions. Background technique [0002] In order to prevent electricity theft and safe and reliable operation, the inlet and outlet of the existing 0.4kV meter box are installed with bushings. However, during the daily inspection process, some unsatisfactory phenomena were found. There are two main situations. One is that some users use the way of adding a bypass line to the electric energy meter by punching holes in the inlet and outlet bushings. Because the bushing is usually long and can be rotated at will, it is not continuous stealing. , So this way of stealing electricity is very concealed and difficult to be discovered. Second, due to the uneven technical level of the installers and the strong or weak sense of responsibility, the casing sealing performance may be poor due to poor installation quality, or...

AI Technical Summary

Problems solved by technology

The second is that due to the uneven technical level of the installers and the strong or weak sense of responsibility, there may be poor sealing performance of the casing due to poor installation quality, or because the staff tried to save trouble, they did not install the casing. When the rainfall is large or the rainfall lasts for a long time, the rainwater will flow into the casing from the loose connection of the pipe fittings, and will also enter the casing along the wire, resulting in stagnant water

If the accumulated rainwater is not discharged in time, it may lead to the growth of microorganisms in the pipe, and the wires soaked in water for a long time will also accelerate aging or directly cause a short circuit, causing circuit failure and affecting safe operation

[0003] For the first case, at present, the main method is to compare the incoming and outgoing currents through height inspections to find power-stealing parts. However, due to the large number of meters in each station area, if a comprehensive inspection is carried out every time, the workload will inevitably increase sharply. Very inefficient, resulting in a dramatic increase in working hours

For the second case, the solution is to drill drainage holes at the bottom of the installed horizontal pipes that are prone to water accumulation; however, this method also has disadvantages. First, it requires secondary processing and increases the workload; second, it is easy to drain during construction. damage to the wire; third, it provides convenience for stealing electricity and is not easy to find

How to effectively prevent electricity stealing through the meter box inlet bushing and prevent the water accumulation in the inlet and outlet bushings from affecting the circuit safety is a problem to be solved by the present invention

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