CN207490417U - A kind of 35kV metal enclosed switchgears - Google Patents

Abstract

A kind of 35kV metal enclosed switchgears, equipped with horizontally arranged ABC three-phase contact boxs, it is characterized in that：The outlet of the B phase contact boxs with copper bar line vertically upward or downwards, A phases and the outlet of C phase contact boxs be inclined outwardly copper bar line be then first inclined outwardly bend afterwards it is parallel upward or downward so that bus-bar room, cable vault alternate and air distance satisfaction >=300mm relatively.The utility model is suitable for due to the KYN61 switchgears that cabinet size limitation bus-bar room is alternate, cable vault is alternate, the distance of cable vault relatively is respectively less than 300mm but is not much different；After angle contact box, switchgear it is alternate, relatively meet standard requirement of the air clearance from >=300mm, and then cancel that bus-bar room interphase insulating baffle plate is alternate with cable vault and insulating barrier relatively, eliminate the electric discharge hidden danger of insulating barrier；And it installs and safeguards and is more convenient；The cost of switchgear also has certain reduction after cancellation insulating barrier.

Description

A kind of 35kV metal enclosed switchgears

Technical field

The utility model is related to a kind of switchgears of power industry, are set more particularly, to a kind of 35kV metal enclosed switch It is standby.

Background technology

Existing 35kV switchgears are designed with horizontally arranged alternate contact box, and the opening of three alternate contact boxs is put down Row, extraction copper bar are also parallel.

KYN61 type switchgears, which are that a kind of 35kV of Guangzhou Baiyun Electric Equipment Co., Ltd.'s production is metal enclosed, to be opened Close equipment.According to the regulation of relevant criterion, 35kV switchgears alternate and air clearance relatively from should >=300mm.By In the bus-bar room of the existing KYN61 switchgears of cabinet size limitation is alternate, cable vault is alternate, the distance of cable vault relatively is equal Less than 300mm, but it is not much different.In order to meet service requirement, widespread practice is bus-bar room is alternate, cable vault is alternate, electric Cable room relatively adds with the insulating barrier compared with high insulation resistance.But insulating barrier is still the security risk point of switchgear. Firstly, since the substandard requirement of phase spacing, the electric field of alternate air section is larger, larger in voltage instability or humidity In the case of air easily ionize, alternate, the high-energy of ionization will act on insulation board insulating barrier gear, cause to insulate Partition board whitens, and dielectric strength reduces, and has the risk that insulating barrier is breakdown, it may occur that phase fault；Furthermore insulating barrier There are wedge angle, when installation, has that insulation board wedge angle is nearer apart from horizontal busbar, and insulation board wedge angle pair repeatedly occurs for scene The heat-shrinkable T bush of the situation of horizontal busbar electric discharge, insulation board wedge angle and horizontal busbar has burns black trace by electric arc；Finally, it is electric The current transformer volume of cable room is larger, and the gap between mutual inductor is smaller, smaller if being separated mutual inductor with insulating barrier Gap will become two smaller narrow gaps, and according to the principle that narrow gap is discharged, anti-increasing does not drop in electric discharge hidden danger.

The installation of insulation board needs to rely on insulating bar, due to the limitation in space, the more difficult installation of insulation board and inconvenient maintenance, more Workload is larger when changing insulation board.

Utility model content

Utility model the technical problem to be solved is that：A kind of 35kV metal enclosed switchgears are provided, it is suitable for by In cabinet size limitation bus-bar room is alternate, cable vault is alternate, the distance of cable vault relatively is respectively less than 300mm but is not much different KYN61 switchgears so that the required distance of bus-bar room, cable vault alternate and air distance satisfaction >=300mm relatively, And without insulating barrier, eliminate hidden danger of discharging as caused by insulating barrier.

Above-mentioned technical problem is solved, technical solution is as follows used by the utility model：

A kind of 35kV metal enclosed switchgears, equipped with horizontally arranged ABC three-phase contact boxs, it is characterized in that：The B The outlet of phase contact box and copper bar line vertically upward or downwards, the outlet of A phases and C phase contact boxs be inclined outwardly copper bar line then first to It being bent after outer incline parallel upward or downward so that bus-bar room, cable vault alternate and air distance relatively meet >= 300mm。

Inclined mouth type contact box is improved to since original A, C phase is directly filled contact box, corresponding A, C phase copper bar does bending place Reason makes requirement of the air clearance from satisfaction >=300mm alternate, relatively, and then cancels bus-bar room interphase insulating baffle plate and electricity Cable room is alternate and insulating barrier relatively.

The utility model has the advantages that：After angle contact box, alternate, the relatively air of switchgear The standard requirement of clear distance satisfaction >=300mm, and then it is alternate with cable vault and relatively to cancel bus-bar room interphase insulating baffle plate Insulating barrier eliminates the electric discharge hidden danger of insulating barrier；And it installs and safeguards and is more convenient；Switchgear after cancellation insulating barrier Cost also have certain reduction.

Description of the drawings

The utility model is described in further detail in the following with reference to the drawings and specific embodiments.

Fig. 1 is the existing KYN61 switchgear side sectional views added with insulating barrier；

Fig. 2 is the axonometric drawing of Fig. 1；

Fig. 3 is the internal structure chart of Fig. 1；

Fig. 4 is the angle contact box front view of the utility model；

Fig. 5 is the angle contact box left view of Fig. 4；

Fig. 6 is Fig. 4 vertical views；

Fig. 7 is existing contact box opening schematic diagram parallel with copper bar；

Fig. 8 is the contact box regional structure schematic diagram of the utility model.

Figure number meaning in figure：1- cable vaults are alternate and insulation against ground partition board, 2- bus-bar rooms are alternate and insulation against ground every Plate, ejectment under 3-, 4- insulating bars, 5- original contact boxs, 6- angle contact boxs.

Specific embodiment

As shown in Figure 1 to Figure 3, for the existing KYN61 switchgear schematic diagrames added with insulating barrier, bus-bar room it is alternate It is alternate with cable vault, be relatively respectively arranged with insulating barrier 1,2 with realize insulation, insulation board be mounted on insulating bar sequence 4 on.Due to Bus-bar room, cable vault are equipped with the components such as copper bar and insulator, current transformer, arrester, and space is limited, therefore insulating bar, Insulation board is equipped with certain difficulty, follow-up inconvenient maintenance.As shown in fig. 7, to be shown using copper installation during normal contacts box It is intended to, as seen from the figure, the alternate minimum range of upper bus room copper bar and the alternate minimum range of subjacent cable room copper bar are only There is 240mm, be unsatisfactory for the requirement of distance >=300mm, therefore frequently with alternate plus insulating barrier way in engineering.

As shown in Figures 4 to 6, it is the angle contact box three-view diagram of the utility model.The 35kV metals envelope of the utility model Close switchgear, equipped with horizontally arranged ABC three-phase contact boxs, the outlet of B phase contact boxs and copper bar line vertically upward or downwards, The outlet of A phases and C phase contact boxs be inclined outwardly copper bar line be then first inclined outwardly bend afterwards it is parallel upward or downward so that busbar Room, cable vault alternate and air distance satisfaction >=300mm relatively.

As shown in figure 8, to use copper installation schematic diagram during angle contact box, as seen from the figure, upper bus room and cable Ejectment uses width as 60mm copper bars under room, and alternate minimum range is 300mm, meets standard and 35kV air switch equipment is wanted It asks, therefore bus-bar room and the insulating barrier of cable vault can be cancelled.

After above-mentioned utility model, switchgear it is alternate, relatively air clearance is from satisfaction >=300mm's Standard requirement, and then cancel that bus-bar room interphase insulating baffle plate is alternate with cable vault and insulating barrier relatively, eliminate insulation The electric discharge hidden danger of partition board；Thoroughly solve the problems, such as that the difficult installation brought by insulating barrier, difficulty are safeguarded；It is opened after cancelling insulating barrier The cost for closing equipment has certain reduction, and the quality of product is also greatly improved.

Claims (1)

1. a kind of 35kV metal enclosed switchgears, equipped with horizontally arranged ABC three-phase contact boxs, it is characterized in that：The B phases The outlet of contact box and copper bar line vertically upward or downwards, the outlet of A phases and C phase contact boxs be inclined outwardly copper bar line then first outward It being bent after inclination parallel upward or downward so that bus-bar room, cable vault alternate and air distance relatively meet >= 300mm。