One-side no-break power supply extendable type ring network unit

Abstract

The invention discloses a one-side no-break power supply extendable type ring network unit which is suitable for a power distribution line which realizes ring network power supply. The ring network unit has the advantages of being fully sealed, fully insulated, common in box body, capable of being extended and the like. A foundation bus, a section of a to-be-extended bus and a three-station switch are arranged inside the ring network unit. The to-be-extended bus is arranged at one end of the foundation bus and connected with a moving contact of the three-station switch. A static contact of the three-station switch is connected with one side of the foundation bus. When operation of splicing the unit is carried out, by means of back brake operation and on the condition of no-break power supply, the three-station switch is powered off and the moving contact is located on the grounding position to ensure that the to-be-extended bus of the ring network unit and the wire outlet side are respectively powered off and grounded reliably, and a bus, needing to be extended, of the ring network unit, is connected with the to-be-extended bus so that the operation of splicing the unit is finished. With an existing power distribution network, power supply reliability is improved, investment cost of the distribution network is saved, and convenient and fast high-voltage power supply is provided for emergency side road operation vehicles.

Description

technical field [0001] The invention relates to a switchgear combination, in particular to an expandable ring network cabinet with uninterrupted power supply on one side. Background technique [0002] Such as figure 1 As shown, the current ring network cabinets are units with only a single function, and the running ring network cabinets must be powered off when they are expanded to combine cabinet operations. Power outage operations will inevitably increase the number of households during power outages, which is not conducive to the improvement of reliability indicators. According to statistics, the power outage time required for power outage and cabinet construction accounts for about 7% of the total power outage time, and with the wider use of ring network cabinets and the continuous reduction of power outage time caused by other conditions, its proportion will increase year by year rising. Therefore, it is necessary to develop a new type of expandable ring main unit th...

AI Technical Summary

Problems solved by technology

[0004] When the 10kV (20kV) emergency bypass operation vehicle is working, it is difficult to receive a 10kV (20kV) high-voltage power supply in the power distribution room, which will inevitably increase the difficulty of the operation

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