A power grid structure for preventing overstepping and tripping of small switch stations suitable for urban residences

Abstract

The invention discloses a power grid structure suitable for preventing over-level tripping of a small switching station in urban residences. The structure includes: a junction box, a digital display, a differential relay, a magnetic seat button, a shell frame cover, a circuit breaker square box, and a storage battery box 1. Wire cap crimping device, the present invention realizes the use of circuit breaker square box and wire cap crimping device to cooperate, inserting the wire cap shaft cover through the substituting wire, and the insulation flap drives and rotates to press the wire end when the impact current malfunctions To form an open circuit protection effect, set up the cover square groove of the closing contact on each air switch gate of the switch station, so that the jumper transfer circuit that is about to trip over the level can obtain the filter shielding effect of the pin column closed insulation arc extinguishing, so that The I-shaped segmented column rotates to form a segmented treatment effect of an insulating folded plate, which achieves the single-to-single pipeline buried carding protection, and is also convenient for line detection during maintenance. When tripping, the armature frame has a high degree of on-off suction clarity, Guarantee the safe and accurate trip protection circuit effect of urban residential power grid.

Description

technical field [0001] The invention relates to a power grid structure applicable to a small switching station for urban residences to prevent over-level tripping, and belongs to the field of urban power grid structures. Background technique [0002] The work between substations and switchyards distributed in urban residences is provided by distribution and transmission through high-voltage line towers, which has very strict requirements on the structure of urban power grids. The high precision guarantees the safety of people when they use electricity. The shortcomings of the current technology that need to be optimized are: [0003] Because the time limit setting value of the switch station is very small, the switch station adopts the method of de-shunting to trip. Once the substation trips before the switch station and cuts off the fault current, the switch station switch will not be able to trip due to the loss of opening current; at this time , when the outlet switch of...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a power grid structure suitable for urban residential small-scale switching stations to prevent over-level tripping, so as to solve the problem of tripping in switching stations due to the small time limit setting value of switching stations. Once the substation trips before the switch station and cuts off the fault current, the switch station switch will not trip due to the loss of opening current; at this time, the outlet switch of the substation will close on the fault line when it is reclosing. Resulting in reclosing failure, when there is a line failure in the switch station, the switch station will not trip, and the substation outlet switch will trip, causing the closing surge current to cause a false tripping phenomenon, which will also affect other switch linkages in the switch station Problems with tripping, conditions that cause circuit disturbances

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