CN201408721Y

CN201408721Y - Built-in voltage transformer-type high-voltage AC demarcation circuit breaker

Info

Publication number: CN201408721Y
Application number: CN2009200455336U
Authority: CN
Inventors: 赵振峰; 孙爱民; 王宝珠
Original assignee: JIANGSU YIYUAN NUOCHENG ELECTRICAL Co Ltd
Current assignee: JIANGSU YIYUAN NUOCHENG ELECTRICAL Co Ltd
Priority date: 2009-05-21
Filing date: 2009-05-21
Publication date: 2010-02-17
Anticipated expiration: 2019-05-21

Abstract

The utility model relates to a switchgear assembly on an intelligent column, in particular to a built-in voltage transformer-type high-voltage AC demarcation circuit breaker which can automatically clear the single-phase grounding fault for a line and the isolated interphase short circuit fault. The circuit breaker comprises a circuit breaker body, a voltage transformer and a current transformer,wherein the current transformer penetrates through and is arranged on a main circuit outgoing line below the inner part of a box body of the circuit breaker body; the voltage transformer is arranged at the upper left position in the box body of the circuit breaker body; connecting wires between the voltage transformer and the circuit breaker body are arranged in the box body; and extended three-phase incoming/outgoing line ends are respectively arranged at both sides of the box body of the circuit breaker body. The built-in voltage transformer-type high-voltage AC demarcation circuit breaker has the advantages of compact structure, small occupied space, low package and transportation cost, convenient installation, high operational reliability and long service life of the equipment.

Description

Built-in voltage mutual-inductor type high-voltage alternating demarcation circuit breaker

Technical field

The utility model relates to switchgear assembly on a kind of intelligent post, specifically is a kind of built-in voltage mutual-inductor type high-voltage alternating boundary demarcation circuit breaker that can excise line single phase grounding failure automatically and isolate phase fault.

Background technology

In the existing outdoor high voltage switchgear, high-voltage alternating boundary vacuum circuit-breaker and voltage transformer are fabricated to separately independently product usually respectively, support separately is installed and is carried out wiring respectively on the shaft tower out of doors when mounted, therefore exist following defective:

1, voltage transformer is external, makes packing and transportation occupy greater room, has increased packing and cost of transportation;

2, special voltage transformer support need be installed during outdoor installation, not only cost is higher, has also increased loaded down with trivial details installation procedure;

3, the external meeting of voltage transformer causes life of product to shorten because of reasons such as the external world is ultraviolet, aging, environmental pollution influence its electric property hugely.

4, external installation back mounting bracket of voltage transformer and connecting line increase, and have increased the potential safety hazard of high-voltage line protection and have influenced attractive in appearance.

Summary of the invention

Technical problem to be solved in the utility model is, provides that a kind of compact conformation, space hold are little, packing and cost of transportation is low, easy for installation, operational reliability is high, service life of equipment is long built-in voltage mutual-inductor type high-voltage alternating demarcation circuit breaker.

Built-in voltage mutual-inductor type high-voltage alternating demarcation circuit breaker of the present utility model comprises breaker body, voltage transformer, current transformer, described current transformer runs through in the box house below major loop outlet that is installed in breaker body, described voltage transformer is installed in the position, box house upper left side of breaker body, and the wiring between voltage transformer and the breaker body is positioned at casing; The casing both sides of breaker body are respectively arranged with the three-phase that stretches out into and out of line end.

Described built-in voltage transformer by its end face and side installing hole and the casing of breaker body in the connector in bight, upper left side be connected and fixed.

Described three-phase is to have coated the cable of insulating barrier into and out of line end into and out of line end.This cable comprises into and out of line end: conducting rod, be connected the conducting rod front end all-insulation cable, be coated on the installing ring oxysome of conducting rod back segment and be coated on all-insulation cable and the cast silicon rubber body of conducting rod blank area and pouring loop oxysome leading portion.

Described current transformer is three-phase integrated composite type zero sequence current mutual inductor.

The utility model has the advantages that:

1, the miniaturization Design of built-in voltage instrument transformer effectively solves its insulating material weather resisteant problem;

2, compact conformation, space hold are little, not only packing and convenient transportation, reduced the installation of equipment supporter in the work progress, reduced cost, and make work progress easier, efficient.

3, the built-in voltage instrument transformer has been avoided loaded down with trivial details external cabling in the equipment construction process, can improve the non-maintaining property of complete set of equipments effectively.

4, the all-insulation cable with epoxy casting and silicon rubber vacuum pouring is into and out of line terminals, can make the binding post exposed part away from casing, has improved fail safe, has also made things convenient for and being connected of line cord.

5, the integral structure of three-phase integrated composite type zero sequence current mutual inductor casting scheme, the certainty of measurement that has solved low current value and high current value are taken into account problem problem and zero sequence CT, the built-in installation question of CT mutually.

Description of drawings

Fig. 1 is an internal structure schematic diagram of the present utility model;

Fig. 2 is the internal structure schematic diagram under the state of overlooking of Fig. 1;

Fig. 3 is the structural representation of cable into and out of line end.

Embodiment

As shown in Figure 1 and Figure 2, be mounted with current transformer 2 and voltage transformer 3 in the casing of the breaker body 1 of this built-in voltage mutual-inductor type high-voltage alternating demarcation circuit breaker, current transformer adopts three-phase integrated composite type zero sequence current mutual inductor 2, it runs through on the interior outlet major loop of the casing that is placed in breaker body 1, voltage transformer 3 in the box house upper left corner of breaker body 1 by the installing hole of end face and side and the fixed connecting piece connection on the casing, voltage transformer A, B be connected in casing with circuit breaker inlet wire major loop A, B; The three-phase of breaker body adopts the cable that has coated insulating barrier into and out of line end 4 respectively into and out of line end; Breaker body the place ahead is a spring operation 5.

As shown in Figure 3, cable into and out of line end 4 comprise conducting rod 41, be connected conducting rod 41 front ends all-insulation cable 42, be coated on the installing ring oxysome 43 of conducting rod 41 back segments and be coated on all-insulation cable and the cast silicon rubber body 44 of conducting rod blank area and pouring loop oxysome leading portion.

Claims

1, a kind of built-in voltage mutual-inductor type high-voltage alternating demarcation circuit breaker, comprise breaker body (1), current transformer (2), voltage transformer (3), it is characterized in that: described current transformer (2) runs through in the box house below major loop outlet that is installed in breaker body (1), described voltage transformer (3) is installed in the position, box house upper left side of breaker body (1), and the wiring between voltage transformer and the breaker body is positioned at casing; The casing both sides of breaker body are respectively arranged with the three-phase that stretches out into and out of line end.

2, built-in voltage mutual-inductor type high-voltage alternating demarcation circuit breaker according to claim 1 is characterized in that: voltage transformer (3) by its end face and side installing hole and the casing of breaker body (1) in the connector in bight, upper left side be connected and fixed.

3, built-in voltage mutual-inductor type high-voltage alternating demarcation circuit breaker according to claim 1 and 2, it is characterized in that: described current transformer (2) is three-phase integrated composite type zero sequence current mutual inductor.

4, built-in voltage mutual-inductor type high-voltage alternating demarcation circuit breaker according to claim 1 and 2 is characterized in that: described three-phase is to have coated the cable of insulating barrier into and out of line end into and out of line end.

5, built-in voltage mutual-inductor type high-voltage alternating demarcation circuit breaker according to claim 4 is characterized in that: described cable into and out of line end comprise conducting rod (41), be connected conducting rod (41) front end all-insulation cable (42), be coated on the installing ring oxysome (43) of conducting rod back segment and be coated on all-insulation cable and the cast silicon rubber body (44) of conducting rod blank area and pouring loop oxysome leading portion.