CN202282612U

CN202282612U - Grounding discharge device

Info

Publication number: CN202282612U
Application number: CN201120415804XU
Authority: CN
Inventors: 李康宁
Original assignee: Bluestar Chemical New Materials Co Ltd Guangxi Branch
Current assignee: Guangxi Bluestar Dahua Chemical Co Ltd
Priority date: 2011-10-27
Filing date: 2011-10-27
Publication date: 2012-06-20
Anticipated expiration: 2021-10-27

Abstract

The utility model relates to a grounding discharge device. The device comprises a compensation capacitor, a main line knife switch, a discharge knife switch and a three-phase alternating-current power supply, wherein the main line knife switch is connected between the compensation capacitor and the three-phase alternating-current power supply; a three-phase circuit at the upper end of the discharge knife switch is connected between the compensation capacitor and the main line knife switch; a three-phase circuit at the lower end of the discharge knife switch is grounded; and a first fuse and a second fuse are connected with the three-phase circuit at the lower end of the discharge knife switch so as to form a short-circuit discharging circuit. According to the utility model, because the first fuse and the second fuse are connected with the three-phase circuit at the lower end of the discharge knife switch, when a discharge current value is larger than the current values of the first fuse and the second fuse, the first fuse and the second fuse are fused, thus the contact of the discharge knife switch is effectively prevented from being damaged, an electric fire hazard caused by electric spark is avoided, and the tripping of a former powder grid caused by short circuit can be avoided within a certain range, and the power utilization of a protected area is safe and stable.

Description

A kind of ground connection electric discharge device

Technical field

The utility model relates to ground connection discharge technology field, especially relates to a kind of ground connection electric discharge device.

Background technology

As shown in Figure 1, the ground connection electric discharge device is mainly used in the electrical network capacitor compensation cabinet and discharges over the ground, when electrical network keeps in repair; Energy storage effect because of capacitor; Have no progeny when main line power supply branch, the main line knife switch was had no progeny in 901 minutes, also had a large amount of electric charges in the capacitance compensation system; Must discharge to building-out capacitor 900, guarantee that the capacitance compensation system does not have electric charge.

Be a kind of electric discharge device over the ground that generally adopts at present among Fig. 1, this kind electric discharge device over the ground has following shortcoming:

The first, the main line knife switch was had no progeny in 901 minutes; The discharge knife switch 902 that closes, discharge knife switch 902 lower end short circuits discharge over the ground, when discharging current is big; Bigger to the 902 upper end contact damages of discharge knife switch; Because of discharge knife switch 902 no arc-control devices, short circuit moment generation electric arc and spark cause electrical fire easily.

The second, when the human operational error occurring, will produce serious consequence.

As: not disjunction of main line knife switch 901, and close when discharging knife switch 902, the serious short circuit of three-phase alternating current produces a large amount of sparks and the serious accident that causes the tripping operation of electrical fire and upper level electrical network over the ground.

Summary of the invention

The utility model has designed a kind of ground connection electric discharge device, the technical problem of its solution:

When (1) existing ground connection electric discharge device discharged to building-out capacitor, because of the discharge knife switch does not have arc-control device, short circuit moment generation electric arc and spark caused electrical fire easily;

(2) when the human operational error appears in the ground connection electric discharge device, will produce serious consequence.

In order to solve the technical problem of above-mentioned existence, the utility model has adopted following scheme:

A kind of ground connection electric discharge device; Comprise building-out capacitor, main line knife switch, discharge knife switch and three-phase alternating-current supply; Be connected the main line knife switch between said building-out capacitor and the three-phase alternating-current supply; The three-phase circuit of said discharge knife switch upper end is connected between said building-out capacitor and the said main line knife switch; The three-phase circuit ground connection of said discharge knife switch lower end is connected with first fuse and second fuse and forms a short circuit dischange circuit between the three-phase circuit of the lower end of said discharge knife switch.

Further, the material of said first fuse and said second fuse is a yellow gold.

This ground connection electric discharge device is compared with existing ground connection electric discharge device, has following beneficial effect:

The utility model is owing between the lower end three-phase circuit of discharge knife switch, being connected with first fuse and second fuse and forming a short circuit dischange circuit; When discharging current during greater than first fuse and the second fuse current value; First fuse and second blown fuse; Can effectively protect discharge knife switch contact to avoid damage; Can avoid the electrical fire that causes because of electric spark, and can avoid within the specific limits because of short circuit causes the tripping operation of upper level electrical network, and the safety and stability of protection zone electricity consumption.

Description of drawings

Fig. 1 is the circuit diagram of the present electric discharge device over the ground that generally adopts;

Fig. 2 is the circuit diagram of the utility model ground connection electric discharge device.

Description of reference numerals:

900-building-out capacitor; 901-main line knife switch; 902-discharge knife switch; 903-main line knife switch; 904-discharge knife switch; FU1-first fuse; FU2-second fuse.

Embodiment

Below in conjunction with Fig. 2, the utility model is further specified:

A kind of ground connection electric discharge device; Comprise building-out capacitor 900, main line knife switch 903, discharge knife switch 904 and three-phase alternating-current supply; Be connected main line knife switch 903 between building-out capacitor 900 and the three-phase alternating-current supply; The three-phase circuit of discharge knife switch 904 upper ends is connected between building-out capacitor 900 and the main line knife switch 903; The three-phase circuit ground connection of discharge knife switch 904 lower ends is connected with the first fuse FU1 and the second fuse FU2 and forms a short circuit dischange circuit between the lower end three-phase circuit of discharge knife switch 904.

The material of the first fuse FU1 and the second fuse FU2 is a yellow gold.

Combine accompanying drawing that the utility model has been carried out exemplary description above; Obviously the realization of the utility model does not receive the restriction of aforesaid way; As long as adopted method design of the utility model and the various improvement that technical scheme is carried out; Or the design of the utility model and technical scheme are directly applied to other occasion without improving, all in the protection range of the utility model.

Claims

1. ground connection electric discharge device; Comprise building-out capacitor (900), main line knife switch (903), discharge knife switch (904) and three-phase alternating-current supply; Be connected main line knife switch (903) between said building-out capacitor (900) and the three-phase alternating-current supply; The three-phase circuit of said discharge knife switch (904) upper end is connected between said building-out capacitor (900) and the said main line knife switch (903); The three-phase circuit ground connection of said discharge knife switch (904) lower end is characterized in that: between the lower end three-phase circuit of said discharge knife switch (904), be connected with first fuse (FU1) and second fuse (FU2) and form a short circuit dischange circuit.

2. according to the said ground connection electric discharge device of claim 1, it is characterized in that: the material of said first fuse (FU1) and said second fuse (FU2) is a yellow gold.