CN103839729A

CN103839729A - Double-insulation arc-extinguishing post terminal of circuit breaker

Info

Publication number: CN103839729A
Application number: CN201410119065.8A
Authority: CN
Inventors: 杨明
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-03-28
Filing date: 2014-03-28
Publication date: 2014-06-04

Abstract

A double-insulation arc-extinguishing post terminal of a circuit breaker solves the problems that electrified display of a bus incoming line side of an existing circuit breaker can not be monitored and partial discharge is large. The double-insulation arc-extinguishing post terminal of the circuit breaker comprises a vacuum arc-extinguishing chamber and a chain finger touch connection seat, wherein the vacuum arc-extinguishing chamber is provided with a sealing gasket and is encapsulated inside a cavity of an insulating cover made of epoxy resin. According to the technical points, connecting flanges at a left outgoing line end and a right outgoing line end of the chain finger touch connection seat are of the same structure, and a voltage-sharing induction shielding ring which is provided with epoxy resin insulating layers at the inner side and the outer side and is made of conductive metal is arranged at the position of a bus incoming line connector, so that the insulating layers at the inner side of the shielding ring has even capacitive electric field induction. The double-insulation arc-extinguishing post terminal of the circuit breaker is reasonable in structural design, has the advantages of high insulating strength, good interchangeability, convenient on-site installation and debugging and the like of an all-insulation modular post terminal, not only enables partial discharge of an electric field to be evenly distributed, but also plays a role as a capacitive type electrified sensor, achieves electrified monitoring, and is safer and more reliable to use.

Description

The two insulation of circuit breaker arc extinguishing pole

Technical field

The present invention relates to a kind of breaker unit for solid insulation cabinet, particularly a kind of two insulation of total solid insulating ring network cabinet circuit breaker arc extinguishing pole being applicable in three-phase alternating current electrical network.

Background technology

At present, in the solid insulation ring main unit of the three-phase alternating current electrical network of domestic production, vacuum circuit-breaker obtains a wide range of applications.Once there is blow-by or poorly sealed problem for the circuit breaker inlet wire of solid insulation cabinet in the applicant, and the notification number " indoor high-voltage vacuum circuit breaker that is CN202230967U, isolation and earthed switch combined electrical apparatus ", the complex structure existing, in practical operation, center is difficult to control, and isolating switch is simple air insulation, there is no solid insulation, do not possess rapid closing function, do not there is the problems such as the ability of short circuit current that close, design one " vacuum circuit-breaker and on-load switch " (patent publication No. is that CN 103325639 A and notification number are CN 203339095 U), the volume that has solved preferably existing circuit breaker and on-load switch existence is large, the problems such as the poor and SF6 gaseous contamination environment of power supply continuity.Because its interchangeability is good, therefore be convenient to on-the-spot install, debugging significant prolongation useful life.But, because circuit breaker inlet wire side, the bus section, busbar section of above-mentioned solid insulation cabinet all do not have charged demonstration, so cannot monitor the charged demonstration of bus inlet wire side.In addition, the electric field induction electromotive force of bus inlet wire interface is large, and office amplifies, and cannot do surface metallization ground plane.

Summary of the invention

The object of this invention is to provide the two insulation of a kind of circuit breaker arc extinguishing pole, the problems such as the charged demonstration drawn game amplification that cannot monitor bus inlet wire side that existing circuit breaker exists are solved, its reasonable in design, high except having the dielectric strength of all insulation modularization pole, interchangeability is good, is convenient to outside the advantages such as on-the-spot installation, debugging, not only electric field office puts and is evenly distributed, but also can play the effect of condenser type electrified sensor, and realize live monitoring, use more safe and reliable.

The technical solution adopted in the present invention is: the two insulation of this circuit breaker arc extinguishing poles comprise with sealing gasket and are encapsulated in vacuum interrupter and the watch chain fingertip Connection Block in the insulating cover cavity that epoxy resin makes, its technical essential is: the connecting flange structure of the left and right leading-out terminal of described watch chain fingertip Connection Block is identical, and the equal pressure sensitivity that the conducting metal that is provided with medial and lateral band epoxy resin insulating barrier at bus inlet wire connector place is made answers shading ring, make side insulation layer in shading ring there is uniform capacitive electric field induction.

Described insulating cover outer surface spray metal ground plane.

Advantage and good effect that the present invention has are: due to the watch chain fingertip Connection Block left side in insulating cover cavity of the present invention, the connecting flange structure of right leading-out terminal is identical, and in bus inlet wire connector place is provided with, the equal pressure sensitivity of external refractive index ring epoxy resins insulating barrier is answered shading ring, utilize the equal pressure sensitivity that double hyer insulation body installs additional to answer shading ring, make interior side insulation layer there is uniform capacitive electric field induction, both solve electric field electric current and passed through uniformly interface, also solved the live monitoring function of inlet wire bus section, busbar section simultaneously, make insulator exterior not have electric field partial discharge phenomenon, so its reasonable in design, high except thering is the dielectric strength of all insulation modularization pole, interchangeability is good, be convenient to on-the-spot installation, outside the advantages such as debugging, not only electric field is put without office, even by CURRENT DISTRIBUTION, but also can play the effect of condenser type electrified sensor, realize live monitoring, use more safe and reliable.

Brief description of the drawings

Below in conjunction with accompanying drawing, the present invention will be further described.

Fig. 1 is a kind of structural representation of the present invention;

Fig. 2 is the cutaway view of Fig. 1 along A-A line;

Fig. 3 is the vertical view of Fig. 1;

Fig. 4 is the upward view of Fig. 1.

Sequence number explanation in figure: 1 sealing gasket, 2 insulating covers, 3 equal pressure sensitivity answer that shading ring, 4 vacuum interrupters, 5 glands, 6 watch chain fingertip Connection Blocks, 7 are flexible coupling, 8 contact pressure springs, 9 operate insulators.

Embodiment

Describe concrete structure of the present invention in detail according to Fig. 1～4.The two insulation of this circuit breaker arc extinguishing poles comprise with sealing gasket 1 and be encapsulated in vacuum interrupter 4, watch chain fingertip Connection Block 6 in insulating cover 2 cavitys that epoxy resin makes, be flexible coupling 7, the part such as contact pressure spring 8 and operation insulator 9.Wherein the connecting flange structure of watch chain fingertip Connection Block 6 left and right leading-out terminals is identical, and the equal pressure sensitivity that the conducting metal that is provided with medial and lateral band epoxy resin insulating barrier at bus inlet wire connector place is made is answered shading ring 3, make the electric field of incoming line answer shading ring 3 by equal pressure sensitivity uniformly, electric field office puts and is evenly distributed, and does not have the most advanced and sophisticated partial discharge causing due to electric-conductor reason.In addition, all pressure sensitivity answers the interior side insulation layer of shading ring 3 to have uniform capacitive electric field induction, has condenser type electrified sensor function, makes equal pressure sensitivity answer shading ring 3 to have the safe voltage of 36V, play the effect of transducer, caused that insulator exterior is as the charged display loop of monitoring.Answer the outside of shading ring 3 to have certain thickness epoxy resins insulation layer in equal pressure sensitivity, answer shading ring 3 again to insulate to the equal pressure sensitivity of 36V.Such double hyer insulation body installs equal pressure sensitivity additional answers shading ring, both solve electric field electric current and passed through uniformly interface, also solved the live monitoring function of inlet wire bus section, busbar section simultaneously, make insulator exterior not have electric field partial discharge phenomenon, insulator exterior is installed additional to ground network and adopt electrode spray zinc method to insulating cover 2 outer surface metallizing ground planes, can accomplish absolute safe and reliable.

Function combination by above-mentioned functional module element, formation of solid polycomplex insulation major loop, the incoming line of solid insulation major loop and line outlet all have live monitoring function, and the power supply of can on-line real time monitoring importing and exporting shows.Bulk loop surface all adopts the processing of the metallization ground plane that electrode spray zinc technology carries out major loop surface, and electric field induction is controlled to insulator inside, can not cause that electric field potential induction office puts to be diffused into insulator exterior, and human body touch can not get an electric shock.

Claims

1. the two insulation of a circuit breaker arc extinguishing pole, comprise with sealing gasket and be encapsulated in vacuum interrupter and the watch chain fingertip Connection Block in the insulating cover cavity that epoxy resin makes, it is characterized in that: the connecting flange structure of the left and right leading-out terminal of described watch chain fingertip Connection Block is identical, and the equal pressure sensitivity that the conducting metal that is provided with medial and lateral band epoxy resin insulating barrier at bus inlet wire connector place is made answers shading ring, make side insulation layer in shading ring there is uniform capacitive electric field induction.

2. the two insulation of circuit breaker according to claim 1 arc extinguishing pole, is characterized in that: described insulating cover outer surface spray metal ground plane.