Three-phase five-wire system rural area electricity larceny prevention device and method

Abstract

The invention relates to a three-phase five-wire system rural area electricity larceny prevention device and method, and belongs to the technical field of rural area electricity larceny prevention technologies. The technical scheme is as follows: a Z-type intelligent switch (4) is installed in a distribution and transformer integrated JP cabinet (1), an E-type intelligent switch (5) is installed in an electric meter box, the null line of the 0.4kV low-voltage overhead insulated lead of a three-phase five-wire system adopts a single-core armored insulated wire of which the armoring layer is made from nonmagnetic metal material and is grounded, and the other leads are common insulated leads; the Z-type intelligent switch is directly connected with the 0.4kV low-voltage overhead insulated lead of the three-phase five-wire system; the E-type intelligent switch in the electric meter box is connected with the 0.4kV low-voltage overhead insulated lead of the three-phase five-wire system. Thedevice and method provided by the invention have the beneficial effects as follows: the electricity larceny phenomenon of the illegal user is restrained, the secure electricity using environment is provided, the electricity larceny risk of the rural area is significantly reduced, and the line loss rate within the area of the transformer is effectively reduced.

Description

technical field [0001] The invention relates to a three-phase five-wire rural area anti-stealing device and method, belonging to the technical field of rural area anti-stealing. Background technique [0002] At present, urban residents mostly use the three-phase five-wire system (TN-S system). The five-wire system in the three-phase five-wire system refers to: 3 phase wires plus a ground wire and a neutral wire. Generally, the most widely used low-voltage power transmission method in rural low-voltage power supply is the three-phase four-wire system, which uses three phase wires plus a neutral wire for power supply. The neutral wire is drawn from the neutral point of the transformer and grounded, and the voltage is 380 / 220V. Adding a neutral line constitutes a 220V power supply line for general household use, and the voltage between the three phase lines is 380V, which is used by general power supply machines. The three-phase five-wire system has one more ground wire than t...

AI Technical Summary

Problems solved by technology

In some rural areas, the gap between electricity supply and sale is large, the line loss is too high, the order of electricity supply and consumption is chaotic, and the phenomenon of electricity theft is serious

The main manifestations are as follows: one is to hang the zero and live wires on the low-voltage overhead wires through metal hooks, or take only the live wires on the low-voltage overhead wires to introduce them into residential houses, and use their own zero wires to steal electricity; Connecting or modifying the meter, resulting in the meter not being able to measure normally or inaccurately measuring; the third is stealing electricity by privately connecting lead wires in the distribution station area

Destroying the metering device and stealing electricity can investigate and deal with users through on-site inspections, but in the face of a huge user group, the work of electricity inspectors has little effect

At the same time, due to the characteristics of irregular timing and unfixed private grounding point, it brings great difficulty to the work of combating electricity theft

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